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isn
ISS2.]
290
IWilliston
Syrp1ii(l;i-. In- \)r. S. W. Willi.-loii," wns in-e>-Oino(l lln-uiioli i]io
Scc.ivtarv, with :\ lettci' fi'oiii ilic aullior, dated X(;\v Ilavuii,
Yale (!()ll('oc ]\[ii.<(«iiiu, May l'^, 18S2.
" The C]as.siJicatioii of the Ungulate Mainrualia "' was read by
Prof. Co])e.
Mew iioni illations, Xos. l).'.!), ilGn^ ih;]. wore read.
Tlic l^ivsideiit re|i(irtod that !,(> li;nl lorwiirdcd a incini»i'ial
ti) tlu' I'lvsidciit mFiIk' N.m.v V,)i'k SiMiato, in lavoi' ctftlie cdiu-
i:i{ii.\rr.M.
l'iii;(; 171, line '21, iiflci' .)A/*.v, install I/clir/i.s.
Page 474, line 'S), omit llilii'tix.
Page 471, line ^'7; roiiiovu .-Jilui ojiix'ti and l/i/ii mirrlds Iidui .I'.i.i-
KiD/K, unci iii.-itM'l miller Cusid.'K (liin' .'N) iIic iianics .■h'li/ini'"(l,ii unci
lIi/(S/iiirftox.
Page 1 7-"), I'dol-noli', Ibi- viti,'. read \ ig.
. •yri>liid;r.
^iiissii'v. Altliong. ..,.11
and t'orty deseril)ed gen. ,,,, , ,,. , [.j. >riu nu enaraeler- llv w iii neei-^iveiy
dislin'-uish ;iny eoiisideralile iiiiinlier. .\s a natural ri'sn iniiny gener.i
liave l)een loosely formed and mor(>. loosely de.<erll)ed, nnt, tlie dillleulty
in identifying specie-; witliont tlie aid of luimeriuis types luis become e\--
treimly great. Tlie present paper is tlie result of many Incurs lediou.s
lalior in idenliiyinii- a eon-;ideral)ly large amount of material wholly willi-
out the aid of type-. I'n'pared two or three years ago it has heen re-
Avritlen and changed many times ; liiai it is free from error yel F do not
presume to hope, liut from my own e\peiienee in the (lillieiillies that are
mot with in working with ihe aid of hooks ajcme, 1 hellcvu Ihut i. will
materially aid in the study of onrspecies.
Tn Oslen Saekeii's catalogue ot .Vmi'rican Diplera— n work Indispensahln
lo all entomolo.^ists li fly seven genera are recorded as jni, ivj; heeii ered-
itahly reeogni/.ed from .Norlli .\meriea, '/
O.l'n/iirr'
n of ]Maeiju;irt 1 have
nioc. AMKit. niii.os. SIX', w. \\'i. •.>;„ ntiNTii) .Miii.sT :t, ISH'.>.
ov'T
I
«,
isn
1SS2.]
29i)
[Willisinii.
Syi"l'1n<l:i'. l>\'T*r. S. W. WillistDii,'' w.'w ]irc>(Mil<^il llii'>>ii'_ili llio
So(!i"t'tar\ . with n lollfi' fiMiii the aiilliKf, ilalcil ^v(.'\v IlaNcii,
Yale (\)ll.-o Ariiscn.m, May 12, 18S-J.
" The Olassilloatioii of tlio I'ligulatc }*[ammalia" was read l)j
Prof. Co])0.
New i)iiii' illations, No-;. M.Ml, liG", '.'lil. wcrt^ rcail.
The I'n'.-iilent r('|ioi't('(l tliat he hail ioi'\vai'il''il a niniii »i'ial
1o thi' I'l'csiili'iit, of the Ni'W \'oi'k Siiiate, in i'a\oi' ol'thc coiu-
lijrlion ol'thc J'ala'ontoln'jv of Ni'w York.
I'ower was given to the Hall * 'oinniittce to proeiire a eopv
of tlie ]io!-trait of T>r. Oeo. \\. \Voo;l: anil the Presiilent was
cinpowereil to fill tlu' vacanr\ caM-cil liv the deatii of Sol. W.
]Joheil--. a nieniber of that ( 'omniitteo.
Anihoritv was <_:iven the l/ihrarlaii to ]iMr»'ha-e \"ol-. F-XII
'I'lMiisaclions of the Anu'rican lMiiIolii;ji(;al Assoelatioii.
Ami tli(! iiiecitin^L;; was adjoiirneil.
! •'>.
Confrihiitiiin /,) (/ .l/iiin>i;yiijih of t/n Xfi-l/i Aiiu I'lron Si/rjJiahv. 11;/ ])i\ S.
(fti'iid Iiif"!'!- th(' Aiiii'n'i-iiii I'/iHosop/iiriiJ Si)i'ii ti/, ^f>ll| I'.K /■'>^'.'. )
Tlic Syrpliiilif form one of llic must, diflliailt fiimllic-^ of Diiilcru 1i>
clii^sity. Allhuuuh comi'oscd llirouuliuiit the wnrlil ot'nlioiil niic liiniilnil
niid I'nriy dcsirilii'd 'icni'ni, tlicy ]>rt'srai lu) iliaracliT^ tlml will (lr(i-;i\cly
(li;-1inL;iiisli iuiy coiisidcnililc iiiiiulicr. As a iKitur;il ri'^ult, miuiy ui'in ra
liiivc 1)i'cn loosely formed ami more. loo<ely descailieil, iiiilii llie diHiciilly
ill idcntifyiii!; spei'ies wilhoat tlie aid of luimcrous typi^s has liecoine ex-
tremely jia'eat. Tlie pre-i'iit paper is llie vesull of many hours tedious
liilior ill ideiilifyiaii" M eoiisiderahly lai'Lie amotinl of malerial wholly willi-
oiit the iiid of type'<. Prepared two or three years M'Jo it lias lieen re-
■wi'itleii and elianired many times ; that it is free from er.or yet \ do not
jM'e-^ume lo lioiie, liiil from my own exiii rienee in the dillieullies that are
met with ill worUinir with tlie aid of hooks ulone, 1 helieve Ihiil ll will
materially aid in the study of our speeies.
Fii ()sl(!ii H'lelxcn's ealiiloiiiie n( Ameriean Diptera — ii work indispensahle
to all cniomohtiiists — fifty se\'en li'enera an' recorded as iia\ ini; heen la'ed-
itahly reeou'iiized from North Aineriea. Tufi'iiK fix of ^laeipiart 1 !iav('
riiof. AMia: niiiDs. soc, \\. IP.'. ',>:,. i'ii(Nii:i> .\ri;i sr :l, ISS-.'.
OV'T
«7
Willistori.]
:}ou
I May in.
resuscitatofl, a.ul have also rccos^ni/.o.! an intrrestin^' new sivcos ot -s<hj>-
./,,../.,• Mac. hitlHTto known only fn.n, South An.ni.a. Simv th^' pnl-l.-
;.Uiou oftlH- .atalo.^nu. fo.u- new ^^.m-v. hav.. lurn .Ir^.Tilu.l by M. I..g''t
and llu. writn-. n.akin- in all sixty two -•■...■ni now known troni ^o.Mh
Amerirv As rc-ards tlu" ilistiil.ntion of tins.. -Mura Iwlvo arc pecu-
]!;„• to onr tanna, viz : J::np,o,U.. ('o,nxt,ihnn, llHln„n,w, /■:,(!< >n<,n>!,u„
h:„rh!m,.,aUotn, 'l\'„choa>cn.h, /'h r.H.sf, ., PJn^lonl.,, Vr>o,'r»r-. ^•>;"''-
/„, M.nnnoidus, an-l Mivo^ja.Uv. TW tirsl lour ..f Xh^.. v;^^\^ (•>•<-
,„,„/„, have n.ver yet b.-c. fo-md in the Easten. States, y ule tin- fol-
,r are not vet known west ..f the one hundredth n.endian.
lowin;^ ...V. .. -. - .
vi/- Truih/l>J>nH, Pi/ropJuma, Doro., Ornptamu^, Il/n.f/o'. Iniclnn-mnu*,
I'hraWisu'x. Sowr/oster. Somula, yVninoxtoma, iW'\ Mlh>ii.>. Of these no
do.d.t the diHtribution w 11 yet be toun.l .nor.' extensive. Indeed tlie wide
distrilmti.mof speeies and genera of the fanuly ov< r our eont.nent wdl
not readilv be paralleled by any other family of insects.
T„ the present paper T have -ivn a list nf all the d..serib..d sp<.eit.s
known west ..f the one hun.lredih nu'ri.lian. These^ with the speeies de-
seribe.l as new, reaeh yet but ei^.tysix ; -d' tb.m titU-tour are known
only from the West, while thirty-two, or o.er ...u-lhird, are distributed
from the Atlantic to the Pacilic; rei;ions.
Five .-enera, of one or two species each, namely: Trhjlupln,^. D/ro-
ph,v,m,^CnpesU,hna, ArctophlU,, and I'U-v.Ua.U^, are unknown to n.c :
their systematie positions have in .ons.Mpicn.-e been whody .Irawn from de-
scriptions and li-nres. They, to-elher wUh such spe.ies as are nnknyvv n
,., ,;„, ,r, i,,,ce.led by an asterisk. An exclamation pmnt indicates Iha
the loealitv, or localities, precedi.,- it are giv.m from speeunens tha I
hav.. examined. It has not been deenn.l n.^cssary to repeat any o the
hiblio.-raphieal referencs or synonomy that are dven in Om..,, Sa.'ken s
catalogue, ex.'cpt smd. as will facilitate the identilication ot species. Ihe
speci.nens which I have examined in the preparation of this paper, from
Vvashinu^ton Territory, Ore.i^on, and Kern Connty, California wen col-
lected bv Mr. 11. K. Morrison; from Mendocino county, Caldornia, by
Mr O 'P. Baron, and Irom Wyoiuin- ('.dorado, and Kansas, by Mr h.
wVluil.l an.l mvs.df. Th.' sp.-.a.-s that 1 hav.. Llentdied, or des,.rib,.d. .-r
that have been previously recorded fn.m ,he West, a.v ,ninted m small
capitals.
I desire to .'Xpress my thanks to Mi
and IT. .V. Hnms,
Baron V. U. von
W. II. Patti n and Drs. (i. II. H.nn
lor kind favors in the pr.'paration <
)f this i)aper.
Osteii Sacken, o
f llcidellierj;, 1 am lumh im
•bled
To
fol
his kindly int. 'rest an.l advic.'.
The foll.)wing table of u-.meric .irr
on
ps is based ess.mtially uitoii
Sehin.'r's
in his Austrian
nil)l
era.
It seems iinpi
that of
dide to iiniirove il>
general fealiires
so fat as our American genera are c.)iiceriuH
> t
I
1S,S'.'.1 **''' l\Vil!lsl()ii.
'I'dJiil', <\l' ijl'iiil i>x of iji I" I'll . '
J —Small cross-vein of the wing distinctly before the middle of the
dix'a! I'l'll, usually sinsiirlit .■iiid ivci;iiiLiiilai-. Iliml Iciimni ii-imll\
siciiilcr, nui iliiikc'iM'il : ilw third iDiiniiiiiliiiiil vein nirdy nnirli hciil.
into llu- lirst i>(»l('rinr vein, u<ii;illy .-'.I'lii'iiii or very j^cntly < iirvcd.
1 — AiilciMi:!' loipjicr lliuii the licad I-
"Z — AntciiiKi' ns louji; or >lioii(i- tlimi the iimd.
//— Miiri^iiKil ceil opi'ii, /. -., ilif srcoiid loMuiludiiKil vein li'i'iiiiii;iii«
ill tJK' liordiT of iIk' winLT.
ji—Pac'c not t\tl)crciil;it(', iior(li.-,!iii(tly f'iiriiiiitc' ; not cxcMvalcd lie-
low ilif iMil"iiii;i' in iifoliif : liypci'stonKi not iirodiH'cd. (Small,
nciirly l):irc -pi'cics, will) siiorl o\aI alidonien) II.
•lii — Face liilicri'ulatc, or li\ pcrstoina prodin'i'il.
* -AtidoniiMi in outline, linear oi' oval, iu'ver narro'ved toward
the ha<(', or elnh chapel. d'eLJIlla' ofu>nai >i/.e.)
|- -Body nniforni tnclallie i^recn, or inetallie jrreen and Idaek ;
ahdonuMi oval or idonu^atc, never slenihr ; iVniora not thiek-
ened, nor I'aeial tnliereie dissimilar in mah' and lemah' III.
}..|-_I51;i,k withjnteous, reddish or yellow, when luiiforni'.y
hiaek the hind I'eniora thiekeneil IV.
fl !■— i'daek or .greenish hlai'k. with yellow or yellowish >tripes
or inuuls, or face more or less yellow.
<__Pjice hlaek. ahdonieii slei'der. wiih yellow or urceni-h
yidlow interruiMed i-ro:--, lian'N -^ -V.
^^- Faee partly or wholly yellow. ;ilHloniiii;il markinirs
v(dIo\\ .
-'~- |)(n'snm ot' tlioia\- with yellow lateral -tripe- "VI.
__^-I),,i'<iini ot' th>ira\ wiihoiit y(dl()W hiieral stripes. VII.
^»_Ahdoni('n coniraeled towiird the hase, mure or le<s eliili-sliapid
VIII.
(f^'— MarLiinal erll e|n-ed and peiiolale IX.
J J — The small cross-vein at or beyond the middle of the discal cell,
(■. (.. the discal section of tin- tbni'lh loiiLiit udinal vein liryond the
small erus.s-vein, is hnl little Ioniser or much shortei- than tlir -eesioii
before it : small cross-vein ne.uiy always oliliqne, the posterioi'
femora freiiiiently thickcied.
,z— Antenna' with a di-tinctlv (hirsal lirislle.
^^— Third lon'i'itudinal vein" hent dei'ply into the liist jiosterior cell
y — Mariiinal cell clo-ed and peliolate X.
YY — Mariiinal eidl open XI.
jj — Third loii'.:itudinal vein jiently ciirvcd.
,) — Arista plumose.
r — Alaruilial cell closed ^X.
£r — Mafiiinal cell open XII.
,■;,; — Arista liare or pnhi'scent XIII.
,^,^_Antenna' with a '-iilHerminal hri-tle or terminal style XIV
I.
j__Sniall cross vein Iwfore llir nrddle ol' Ihi: di.-cal I'cll.
1 . .\iMeniia' loniii'i' than the head.
A.— Scntellnm tlattened. with iwo olnnse points: face evenly roumled,
piihesceni, without luherele. eve- -eparated in hoth se.\es, mirrowlv
ill the male ; first po-ierior cell with a stump of a vein Iron; ilic ihinl
lon-ntiidiiial : dark or hl.ack snecle-, unrelieved iiy li-ht mark
jny.j. Microdon
"Williston.] «>'J*- [.Miiy K».
^Irf'UonoN sj). iiov v "Wn'iliiiicjton Torntnrv. f'liliforniu !
Tliis is tlic liri lime lliis iiciiiis )i;is liccii icconlcd fioiu tin; I'licitie
(•0!isl ; fi;j,lil or niiH- .siM-cics iiri" known from the eastern part of" the (;on-
tinent.
AA. — Scutelluni uilhuut |>ofMl> ; tliinl antmnal joint elons^alc^ ; face i)ro-
(lueed downward, nliUi-dy tul)er<u]al(', yel'o'.v with black median
stripe ; dorsum ot' thorax with lateral, yellow, interrupted stripes ;
abdomen ovul, arched, with yellow bands ; eye'S pubescent,
Chrysotoxiim.
This is one of those genera of Syrplndie, Avliose species me hard to dis-
tinguish and riMinire nineh material to satisfactorily study.
('MitYsoTOMM fV) i)t;i!i\ ATI M Walk., Wa-hinuton Territory ; ^fl. Hood,
Oregon, Apparently a common species. The Icmora ar<- mostly blaek,
and the lateral margins of the abdnnicii yellow, otherwise it agrees with
v. latcrnh Lw., Cent, v, i'l.
II.
A. — Small cross-vein before the middle of diseal cell.
1, — Antenna' as hmn' or shorter than the head.
a- — Marginal cidl open.
a. — Face without turbercle or hyperstoma not produced.
B. — Abdomen of only four ajiparent segments ; \-ery small species
(2-.") mm.) l)lack or greenish black, the ground coh)r unrelieved by
lighter spots, stripes or b.amls *Triglyphns.
BB. — Abdomen of from live toseven segments: third Joint ot" antenna'
oblong.
C. — Face evenly roundeil, not at all ])n>jecting in outline (hind femora
moderately swollen) ; face dark without yellow Pipiza.
Asinglespcciesof this genus is recorded by Oston Sackcn (West. Dipt. p.
'522) from Sonoma Co.. Cat. In Furope the species are very numerous.
CC. — Face slightly carinate below, partly cu- wholly yellow, eyes pilose,
in life usually with bri'j.Iil striiics (small, mostly finely punetulale ;
abdomi'ii oval, obtusely rounded behind, black or black and red, not
banded) Paragus.
The species of this genus like the preceding are very dillicult to sat-
isfactorily distinguish. Three species are recorded from the Eastern
States and I have at least three more yet unnamed fixmi the Pacific re-
gions,
Pakagis DiMiDiArus Lw., Cent. iv. Oo. "Western Kansas, Colorado !
III.
J. — Small cross-vein before the nnddle of diseal cell.
1. — Antenna' as long or shorter than the iiead.
«. — Marginal cell open,
aa. — Face tuberculate, or hyperstoma i)roduced.
*. — Abdonum oval, never narrowed toward the base, or club-
shapetl.
f. — rniform metallic green, metallic green and blaek, or
black species ; hind femora never swollen.
'^^-•1 '^^-^ rWilliston.
D. — False vein of wiivj; iisiii.lly Mulistinct or alxciit ; fnml in ., or fart;
also ( f , ) with frausvcrsc '.« rinklcs ; liinii holder ol'.-cuiriliim sharp .
small, oval, niiMailii', i ' a iy i)arc spccifs Chrysogaster.
a.— Outer i)oslerior angle of lirst posterior cell olitiise. (7in/s»,j, !.■</, r.
aa. — Outer posterior angle of first postiM'ior cell n^rtaiigular or
"'•"'t' Orthninnnt.
The cliiiracter given is that usually taken as the ilistinetion hetweon tho
two genera, hut is very uiireliahle and misleading, ami, moreover, sepa-
rates closely related species ; the length of the antenna' is c<pially tiure-
liable ; T place all tin; species in Meigen's genus. There are suHieient
l)lastie chiiraeters to render the laliulation and identiriealion of our species
'^ ' parativcdy easy matter. At all events, it is evident that <)rf/ioiic>im
canimt Ik- used in Loew's or Scliiner's .>ense even as a suh-genus for the
Ts'^ortli American sjjecies.
Our species may he tabulated as follows :
a. — Tiiird Joint of antrnna' orate or orhieiilar ft.
— Thinl joint of antenna' elongate c
h. — Third joint of antenna' ovale c.
—Third Joint of antenme orbicular d.
r.— l)(,rsum of thora.K opacpie black {,^) ■^nit/rijhn,
— Dorsum of thorax not black opaciue, with dark striiu's ; finely punc-
tulate ; tip of fourth vein bent inwards infjrodtft'di.o.
</.— Outer |)osterior angle of first posti'rior cell not obtuse hifi/.i.
—Outer posterior angle of first jiosierior cell obtuse uxluhitits.
<•. — Tlie ultimate section (.f fourth loimitudinal vein Joins the third be-
yond the tij) of second vein, the dark clouds not continuous nor in
the same line : second Joint of antenna' nearly as long as third : eyes
with distinct linear markings ; posterior Iionleis of second and third
abdominal segments brown /u'tidus.
— ritimatc segment of fourth vein Joins the third opposite or before
til) of second, abdomen not fa.sciate. . .' f,
f. — (loud from tip of second vein continuous or in same line with ulti-
mate section of fourth vein; eyes with markings: second Joint of
anti'nna' nearly as long as third hdhdns, s]). nov.
—Second Joint of anti'ume considerably shorter than third, abdomen
shining b'.-assy on the sides, the disc mori' or less opaifue ; eyes
nearly unicolorous ; stigma brown ".y.
r;.— Second Joint of antenna' half as loan- a> third ; the liiird Joint some-
what narrowed beyond the middle ////•///(-'// ///,•*.
— Antennjc i.ol longer than the face, second joint short xfiijinxli/s,
sp. nov.
CmiYsoGASTF.n sTrr.M.vTi s, sp. nov.
cf^V- Antenna' black, not longer than the face, first joint short, second
joint twice as long, about one-fourth as long as Ihird. Face deep green.
shining, nearly smooth, with sparse pile, and a silvery white triangular
U illiMud.
:m
I.Mri.v t'.i.
S)")! 1)11 I'acll Mill' liriil- llii' ryi- nlp.ivr; ll \ |iCI-tn||i;i Tnitcll |in<ic(t ilisr.
KroMlMl triaiiLTlc ( ; ) swdllni. di^iiiirlly To— iiliiti-, |V,,iii ( . ; wiili well
nmrkcil iMicnil litodnc-;. V.yi>< iiiiifonn. 'I'lmiMx and sciitcllmii sliiiiiiiu:
iiii'.'ii, Ihii'ly |iiiiutnl:iic, Willi nl>-(iiiv jiilc. AlMlnimn hnyad. Mack, with
slii.ri aiiprc^-^i il w hiir- |ii||.. Imh liiilc ^^liiniiiL;'. in the male llif ciitin- maririn
with liic liyji i|)yiiiiiiii >liiiiin,n hrasxy lirccii, the \ciiliT sliiiiini: like tin;
iioiilcr. Wilms fuscous, sti'riii.'i lirown. nuicr aniciior aiisrlc of tlrsl pos-
tciior c( 11 (il)iuM'. f.ct^'s Mack. Loul;-. c<>i|i. f. T mm. California.
CiiiivsiKi \s(i.i: r.i:i.i,rt.i'.s, sp. uov.
(^^. .\nlcnii.T niMi-h lunwu. a liltlc loimcr liian llic face, .sccoiiil
joint a litllc -lioriiT ihan lliinl. Fa.v -i n lihick. li-htly rii-osc, wliiie
l)iln>i', liy|icr~!iiiHa lundcialcly pvodiici'd di>\\ inva id. Froii;,;'. •••iiniu;i(. ( ^i)
not swollen. lV(,iii ( . ) wiih well maikcd lalcral niirosilics, eyes ■■wit li
i!Tcu;uliir n.irrow lim-ir marking.':-. 'I'lmra.v and >rn,illiim \>n'i\\\ i:rccii,
scaliriHN, w iih four iiarrnw copiH ry , Iripcs. .Midonini oval, a liltlc darker
.^rccii. luoiv shiiiiuu' o:i liic liordcrs. punclulatc f,iM;-s i)lark, l>a>c and
tips of all ilic lilii.r. and first joinis of larsi yc!lowi>li ivd. \\in,i;-s nearly
hyaline, sli-hily clouded in tlie oiuer ccll.s, stianiii brownish, last scctioii
of fourth vein ,-liaiulit. reetaimiil.ar, joinin.ir the third nearly at liuht nii.iilcs
oppoMie the lip of s( ('(Mid \cin. clouded with l.rowii, ilie <'loiid eiiher c.\-
teiuliin;- aero--s io lip of secoiiil Vein or more or h-s iiiieirii|)ted in front of
tile third, l.nu's. corp. C. T mm., W'asliiiiLLton Territory, (,'aliforiiia.
Hitler- I'n.iu f, iiitiihiK Wied., which it closely rescinblcs, in ils larijer
si/e. the second joiiii of antenna proporlioiialclv a liti le >liort(,'r, and llie
concaviiy of lower part of face beiu- les.s, in the ab-ence of abdominal
fa.-cia'. and in the lerminfition of the tburlh vein.
('iiitvs(i(iAsri:R NKMioviTTA'rrs r.w., /(it. f (W's. Xatnriv iSTfi. p. ;13:;.
Colo.. W'ashiimton Terr. ' Calif
DD. — F.ace an<l front without transverse wrinkles: falsi' \cin .alw.ay.s
present, the fourth \'ein never bent inwards tow.ard the lip; fiVc
usually wMh di-!inct tubercle, third Joint of antenna' never
elongate. Small or mediuui sized spc 'ies, more or less pilose ab-
<lomen never slender. Cheilosia.
Thi.s genus, a \<ry lariic one in Eiiroiio, has hitherto con.visbnl <.f liut
seven dcscribei] s|M-cies, none of them from west of the Hocky .^^ollntains.
r describe here live additional ones from the Western re;nons, two of
iheiu beloii-inn- to the divi>ion Willi pi|,,s,. ,,ye.^ hiHierio undescribcd in
till- country.
'1 hree or four of Dr. I. oew's si>ecies ari' unknown tome, but this writer's
familiarity with the u-eir,!,-. ..ii.iblcs his specie, lo be placed with a u'ood deal
i>t' certainly from the <leseriptioiis .alone. In the idciitilieation of species
descrilied in but om' .sex, it should be remembered that in the female
111" pilo>iiy of the eyes is less, the antenna' usually lighter colored, and
ilie thiiil joint hiruer.
iHsi:.|
rm
I Willistitii.
"• — Kyi's (list i net ly i)ilos(^ ; _ j,^
— 1'',\ cs Icirc
/^— Tliinl J. lint of .iiiiriiiKf ( • ,) mumII. ovul, l)l;i(kisli ; face witli spais.'
loii^- pile; wiiiL^s not liuliHT Idwaitl the lia~.' ,>rri,l,„t^liH, -.p. nov.
—Thii%l Joint ot'an'.-miii' ( ; ) lafLrcr, MilKpiailralc, niiijisii; wiii;:s iiMl,<,.r
towaid tiic l.a.M' hiMoi,h(l„ih„ux, ^^. wuv.
<*. -SrutfiiiiMi vvitii hri^ily liaii-s on its hofdcr ,/.
r-Si'ntclliuii witiioui lirisiiy liair< on its hoi-dcr h,
</— IhinhTi. ^nitclliini. an<l lowci-part of the; fiicc, liili'ons ; face stronirly
I'xcavatfd aliovc : arisln piiltcisccnt ,".
-- |}lacl< -liiniii;:: ; arista jiilosf Ccxrcpt in fri'stis) /.
'•. — All the f.nioi-a except ilie apex hlacU *leucop<trca
— liind I'euioi'a. (•^(■ep| base and iimia, hlaci^ -pnUipcs.
/. — f.e,u,s hlaeU, knees, base and apex of lihia' and inor<> or less of tiie
lafsi, liitcous ,.
— Anteii,)!' leus liiteous, posterior lilackisli witli tlie base and apex of
femora and tibia' and hist joints of tarsi Inteons pbnaatK.
</.— Second and tliird sei,Mnenls of abdomen, exeent anterior uniilcs,
';i'^"l'i'' (:f ) \ tristis.
—Second and third sen-nienis of abijomen whollv shinin<'- (--^'i
CiliDli KCCHK.
A.— Abdomen with distinct, entire cross bands, le-s, except tlic posterior
'«"i'»''"- '••■'' ,-<,_1ip,)<, sp. nov.
— Abdomen without metallic bands (
J.— Second and tiiird senmenls of abdomen opaipte ( ') j,
— Abdomen whollv shinin". .. . /.
J. Le.iis l)lacU lui/n'pi'nnin, sp. nov.
—Leg-s luteoiis, femora black *-i;ij,i'!hi/(.
/.-.-LeiTs black ,^„,,_,„'
— Legs in large i)arl luteous j„n'ni. sp. nov.
CiitaLo.siA THisTis r.w., Cent, iv, 71. P,ritish America. Tliree male speci-
nicns from Oregon and Washiiiglon Territory agree .so closely with
tiic description of this specie>, that T ix-lieve it to be th.c r:'.!;!C. ! li.'ivc
no other spccimiMis with which to compare them.
Cni'.ii.osiA coMosA [-w.. Cent, iv, (i(i. Colorado! Red River of the .\orth.
The previous remarks will apply eipially well to this species.
Ciii;ii,()siA o((ii)i.;ntai.is, sp. nov.
ri'.— Frontal triangle black, with black pile, swollen with a depression ;
antenn.e black, third joint somewhat brownish, nearly orbicular, small,
arista with scarcely i)erceptible pubesc'enco. Face shining black with
sparse liitescent pile, scare(dy concave from base of anleiinje to tip of
tubercle, deeply and shortly concave below the latter. Eyes thickly
pilose, lutescent below, fuscous aboyc. Tliorax deej) green black, witli
brown or blai'kish pile, intermingled with shorter lutescent. Aluhmien
oval, not at all slcndei;, deep, somewhat metallic green, shining, pile lutes-
WilIisto;i.l
aoG
[May 10,
cent, lonircr lliiiii in Uic tliorix, cspcciiiUy on the sivlos of tlie anterior !»cg-
ineiits, ilio (lorsuiH in tlie iniiUUc iieiirly ]kuv. Lc;ts liliick with bliick and
luti'sci'iit pile, til>i,i' reddish at Inisc antl cxtrtMne tips. Ti'ii-u];u lidit yel-
low, ha]l(Mvs yellow. Winij;? smoliv brown, daiivcr in front and at the
root. One specimen. California. Lonii'. cori). 11 nin\.
An additional species from California lias lariicr. more reddish siilxiuad-
rate tidrd joint of antcnme, arista siiorl pilose, no pile that 1 can dis-
tingnish in llie faee, and tlie pile of tlie body sliorter.
Ciii;ii,()srA i,Asi()riiTiiALMi s, sp. nov.
cf. — Frontal triangle moderately .swollen, ^vith an impressed longitudi-
nal line, and ligiit yellowish pile. Antenn.e brownisji red, third joint
rather large, nearly square, arista bare, bla-k. Face dc(^p black, shining
Avith yellowish pubescence, slightly excavated below the antennje, con-
siderably i)r()diiced below the eye.s, a well marked groove begins at the
base of the antenna', runs obliciuely outward to the eye, and then curves
downward near the ey(! into the ciieek. Posterior orbits below broadly
dusted with yellow. Hyes thickly reddish yellow i.ilose. Ti\orax metal-
lic grd'ii, shining, thickly covei-ed witii light yellow jVdc!, on ti>e pleuric
bushy. .Mulomen l>road oval, shining l>lack, with abundant pile like tiiat
of the thorax. Ti-guLe light yellow. Legs black with yellow pile, fen\ora
nt the tips, base and tips of tibi;e, and basal joints of intermediate tarsi,
yellow or hUeous. Wings sid)hyaline, with an indistinct brownish spot
near the nnddle, basal part yellowish. Long. corp. lO-Unim. Four speci-
mens. Colorado.
Female specimens that may l)eli>iv!i" to this species from California have
the pile much shorter and more grayish. They are too badly preserved,
however, for me to determine with auv degrjc of assurance.
Ciii:ii-OMA iukiim;s, sp. nov.
9-— Front and face shining black, i'.- former on the sides aiul the latter
exc<'i)t tlie tubercle lightly covi-nnl with minute gray pubescence. An-
tenna' blackish, third joint twice as long as wide, reddish on the under
side, arista bare. Tliorax metallic green, lightly punctulate, pile very
short, Avhitish; sciUellum with an indistinct, transverse groove. Abdo-
men black, with a metallic rctleclion, smooth, shining, elongate oval, Avith
u small tuft of whitish pile on the side of the second segment, and very
short, elsewhere ; second segment with Iargeov;il spots in front, narrowly
separ.'iled ; third segment with liroati cross-bands in front, atlennated in
the middle ; the fourth seuinent with similar but less attenuated ; the fifth
segment partly or wholly, hluisii green, f-cgs red, posterior femora an-
nulate near the middle, or almo..i wholly brown or blackish, terminal
joints of tarsi infiiseated. Wings Iiyaline, stigma dilutely yellow. Long.
Corp. S-'.l mm. Washington 'reriiiory, California. Five specimens.
Tlie abdomen is not sulliciently fasciated to |)lace it among the J/tlanos-
toiim ; in everything else it presents the characters of Chcihsia.
s\
1882.1
307
[Willistoii.
s\
CiiKir.osTA >;r(ii!H'KNMS, s]). iiov.
^. — Deci) bhick, eyes hare. Froiitivi triaiig-lc and faco sliiniuLf lilack,
the toriiKM- fossulatc, the latter very slighll}' excavated lu'low tlic aiitciiii;e.
Antenna' small, l)asal joints black, third joiid reddisii-hrown or biown,
rounded. Tiiorax hlack. nearly o|ia([ue, with short l)lack pih; above and
lonuer on the pleura' and scutelluni, the latter shinint^. Abdomen sliort,
broadly oval, depressed, opaipie black Avith a bluish cast, i)ije on the sides
of I lie anterior segments, reddish-yellow, anterior angles of third and
fourth segments, shiiung metallic. Tegula' with blackish border, and a
fringe of l)lack pile. Legs black. Wings lilackish in front, clearer Itehind,
veins black. Long. corp. T-N nun. Three specin\ens from Mt. Hood,
Ori'gon.
Chkflosi.v I'Ain a, sp. nov.
$— Shining greenish-black, with a 1)rassy reflection. Eyes bare. Front
.1: d face shining, the former with short, fuscous pile, the latter moderately
excaA-ated below tlie antenna', tubercli! broad, obtuse. Antenna' black,
third J'>int oval, somewhat reddish lielow. Thorax and abdomen Avith
short, !utesc(Mit pile, sparse; on the latter, A\iiich is elongate oval. Legs
lut(!ous; the anterior femora toAvard the base, rings of llie tiliia', ami ter-
minal joints of tarsi and the posterior legs except the ends of femora, iiase
and tips of tibia', brown or blackish. Wings lutcscent, veins black. F.ong.
Corp. 5-0 nun. Mt. flood, Oregon.
IV.
J. — Small cross-voin before the michlh; of the discal cell.
2. — Antenna' shorter than the head.
an. — Face tubenadate or hypersloma produced.
*. — Abdomen linear or oval, m!\'er club-shaped.
It — ]?lack Avith luteou^, reddish or yellow ; if uniformly black,
the hind feuu)ra thickened.
E. — Tlyperstoma produced into a long, slender porrccled snout ; fcmin-a
sk'uder (the third longitudinal vein joins the eosta beyond the lip),
Rhingia.
The single American species of this genus R. iinsirn Say, is ver\- coinmon
ill the Lastern States, but T have lU'ver seen a lihiiigin from beyond
the ^Mississippi.
EE. — Face not produced into a snout like hyperstoma, femora nuire or le.",;*
thiekencil.
F. — Face not produced, extending but little beyond the eyes, in ' much
more tulierciilate than in V ; himl femora usually "with spines be-
h)\v, abdomen oval. >lostly black species or with liiteous mark-
ings at bas(; of abdomen, scutelluni, huincn'i, cheeks, etc
Myiolepta.
Four species have been described from Eastern North America, and tin;
genus is now recorded for the first time from the West,
i'KUf.'.\.Mi;u. i'iniA)s, soc. .v.\. U^V 2n. I'Iikxtku Atcit.,ST !!, J^'^y'i.
WillislDii.] ' o08
(May 10,
Myiot.ki'tx vAiiii'F.sLw., f",.nl. ix. T<). Vi,..i„ia.
SiKTinuMK very <l..sc-ly alii,.! to il.is siktIcs. il' ,„.t il,,. snmo, T Invo from
nasliin-ln„T,.,nt..ryMiMl Ivcni .•oniily. CMliturina. 'Ti.c lalcral mannns
''I tln—ron,lM.nn.,nlan. l,asal parts of -Ih. taisi arc lut.-ous. lu'lhe
mail' llic facial IuIhtcIc j. i)niiiiiiiciil, tliMi-li small.
3Iyi(»i,i;i'ta r.i.i,i,A, sp. iiov.
9- — I''lacU. shiiiinir. Front nit], very short hla.k pile al)ov.. • faco.
baro, mifl, iin„lu.T,l, i„ prolil.. hrinly ,.,„n r.x in th,. ini>M],. of ij,,. ron •
<Mvity i„.tw,.rn anirnna. and lip. Antc-nnal basal joints nearly l.lark
'l"|-d jonii lar.uv. oH.i.-uIar, r.'.l. ariMa l.lacU. Th..rax with .shnrt hlack
pil.', somewhat intermix,.,! wi,h y,.llo\vi>h. lonuv. on th,. bonier of iIh^
s.ail..llnn,. Ab,l,nn,.n very >hinin- with sln.rt, whitish lul,., lon-.T an,l
bnshy on th,. si,h.s ot the .seeond se-ment. ilalleres liu-ju v..|low'. Le-s
'•lack uith bla,k pile. Win-s sm,.ky or brownish toward the end
>>!..-ma bn.wn. l.ong. .'orp. 7-8 n.m. Thive speeinn^ns, W'ashinivtoii
I crrilory : Ml. I[oo,l, ()rei;-oii.
FF.— Face m,.re or le.ss ;>rodneed, extending ronsi,l,.rablv l„.low the eves
hiiln.r wln.lly or in lar,-,. p„rt Inteoiis or rechlis'h. the arista "fre'
(inently pubescent or pilose.
G.-Fa..e carinas, abdomen oval Brachyopa.
Our speeii.s may he tabulated as folh.ws :
'/.— .\rista distinctly pula'scent : face and antenna' vellow or yellow-
i.-h re,! ■ ■ ,
, , /).
— Arista bare. . .
/>. —Dorsum of abd,.men brown ■/■•fi'nurihi'cii
— Dorsum of ab,l,nuen yellowish-r,.,!, with brown ineisures, and a
brownish median lin,. '/,,;///,/
'•. — Face and front brownish, densely clotheil with -ravi: Ii |>ollen."
abdomen mostly l]r,)wn ' •/• '
-Face yclh.w, upp,.r pari of fr.mt ( V j browmMi-black. antenna.
y<'ll,.w, thinljoini large ;abdom,.n rchli.h-yrllow with brownish
incisure.' , ,.
IIKAll-l, sp. llov.
^ Hk-Ukvoi-a? notata O. S., Cat. Dipt. 247. White Mts., X. ][. f().
Siuketi) ; .Mt. Hood, Oregon : Wasliington 'I'erritory !
nitAciivorA vaciaO. S. Oana.la (O. S.) ; iCern (',.. California !
A single female sp,.cimen from this locality agrees .soelos(.ly with Haron
Oslen Saeken's doerijaion that f b,.licve it to be the same spcei,.s. Th(.
legs and anienna. arc, iiowev,.r, m,Mv rcldish than brownish, and lii.^
wings are ([iiitc. hyaline, imu-e so than the pivc'diuLi'.
JJllACIIVOl'A MKDI.V, SJ). n,lV.
9— Face and lower part of fn.nt re,l,lish-ycllow. th.. latter projerling
rather more than not.il^i; antenna. tlii. sanu. coh.r m- a little li-i-liler, the
tiiird J,.int very large, arista br,.wn, y,.|lowi^h iil th,. bas,., "fnmt in
the upp-.r iwo-lhinls black, grayi.-h p,,llinose. |),.rsnm of tli,,rax neirlv
♦ I
tl
1.SSL>.1
309
[Wilhstnii.
lihick, \\itii sliorl wiiitc pile and tliick irray ]ioll(ii, Icavin;^ tlini- ilurkcr
stri|)"s, -cuiflluiu rcil ; airlimcn yrllow, tlir -•■unu'iils wiii' n:ir-(i\\- pos-
li-rior lir(>\viii>li liii'-. \.r\i< rcdili-li-yi'llnw, lln' liiml 'iliia' s.)in<'\vh:it
lirowiiisli. icniiinal juint- nf tarsi rii>ciius, or hlacU, hind Icmoni a little
inci-a->atf. Win^- hyaline with a sli-iilly yellowi-h ihiLii'; tiist posterior
cell hrielh- iieliolate, the lia^e of second iiosierlor i-i-ll is an obtuse angle,
al)our midway between the two preeedin:'; speeii-s. Loiii.-. eorp. O-T nun.
One specinu'ii, Kern county, Calitbrnia.
G-G. Faee more pfodueed. obtusely lidierrnlate ; abdomen lona' (xylo-
liionui; with seutellar. jioslabir. doisopleiii-al and mesopleiiral
liri.-tles. All the femora thiel^i'Ued and iri'eLrnlafly -piiiose. . . .
Eugeiiiamyia \\ l>tn.
F.i(.|-.NiAMVi.\ KiFA \VlsUi., ( anada Hntomoiogist, Vol. xiv, p. Sir
(';ditorni:i !
J. —Small efoss-vein. liefore tlie middle ofthe discal eell.
!>. — -Antenna' slnifter tiian the liead.
(I. — Marginal cfdl open,
ii;'. — Faee tulxTCulali'.
*. — Abdmnen elonixate, not elnb shaped.
|j.)._I51aek or greenish-black, wi:l> yellow or yellowish or fer-
ruginous iiilerrnpted abdominal ero-s bands.
y._Facc black.
H. •Winiis not lou'ier tiian the abilnmen ; ocellar tubercle large,
promint'Ut ; idMlomen dcpresseil, long, (dliptical, somewhat nar-
rowed ai tiie base, i lie lighter markings ferruginous or oranuc-yel-
low " (Schiner) '. ^^Pyrophcena.
HH.--Win!:-s longer than tin' abdomen ; ocellar tul)ercle not unusually
lariic, abdomen more sh'udcr, the cross liands yellow, or gre<'nisli-
yi'llow.
I. Anterior tiiiiic ai;d nu'iatarsi of male dilated. . .Platycheirus.
Fi,.\TY(i!i:i II s (;i AtMi.vit s Say. Washington 'I'erritory, K'ern Co.,
CaliftH'uia !
I cannol di^li"'ruish specimens from tliese localities from our Eastern
ones; liie e(dor of liie nind le^s vary much a- ihey do in the F;ist.
«
? Fi,.\TY(Hi:im;s iiYi'i'.iiUDni-.i s Slacker.
Another s|)ecies fivmi \Va-lnn<j.ton Territory does not dill'er in any note-
worlliy degree from a female siiecimcn (d' /ii/jx rlhu-cix idenlilied by IJaron
Osten Siu'Uen, i)Ul liu' male's libiic arc not-dilated. I am strongly imdincd
to ludievi' tliat the diliUation is nothing more than a s|>ecific cliaracter, and
that the name /'!■ Ii/rln ir'/K shotdd he given uji as mi-lea-!ing, and all the
species placed \inder MiltiiiiiHlniiiii. /'. iiH'tihuihi^. is xai'ialile, .and only a
large atnouut of material will settle the question whether they are a group
of closidy allieil species, or nu'r(dy varieties; in the tbrnier case, tlu- genii.s
siiould he letaineil, in the latter, it -liould he united with Md'Hiii^lDiiiil.
<i»iigij^
Willlston.] .'}!() ,„ ,„
[May lit,
II.— Anterior ti))i,(> and tarsi of miil(! not dilatctl Melanof toma.
Mi-;i,ANO.ST.)MA TKiurxA O. S., West J)ipi. I}-,';',, Wasiiini^ton Te;ritory,
California ! conunon.
MKf.A.NosTOMA S( AiAnis Mci.uM'ii ; Scliincr, Fauna Aiistr. Dipt., 291,
Colorado! Knroix- and Xorth Aniorica.
VI.
J.~Sniall cross-vein before the middle of tjio discal cell.
~. — Antenna' short,.
(t. — .^laruinal cell i)\wn..
aa.—Faee tuberenlate, hyperstonia not i)rodueed.
*.— Ahdoinen oval or elonpite, not club shaped,
ttf. — Hlaek or -rreenish-biai'k, with yellow in:irkings.
^^■ — Fa<'e wholly or in part yellow.
;:. — Dorsum of thorax with yellow lateral stripes.
J.— Abdomen with seven visible segments, the hypopygiuni unusually
•'"■•'^'' Sphaerophoria.
I have; numerous specimens of this genus from the Western regions,
among which there are probably four or five species. I recognize, how-
ever, only one species, viz :
SiMi.-Kitoi'iiouiA MrcuiuA O. S., West Dipt., 3:50, California !
* SiMi.KiiOi'iiouiA suLiMiuiui-KS ThoHisou, Eugcu. Uosa, .jOI i^iirnhus),
O. S., 1. c., Calif. '
JJ.— .Vbdomen not showing nu)rc than six .segments, hypopygium not
unusually large.
K.— Eyes of male with an area of enlarged f .cets above ; abdomen
rather slender, fourth .segment with yellow median stripes and
oblique side spots AUograpta.
* Ar.i.ooHAPTA FiiACTA (>. S., West Dipt., p. ;}:!!. 8anta Monica, Ciil.
KK.— Eyes of male witliout area of enlarged facets (fourth seo^ment of
abdomen fasciate). ' "
L.— Thorax with a median, dor.sal, cinereous line; ocellar tubercle re-
mole from vertex; slender species.
M.— I'osterior femora enlarged and bent Toxoraerus.
»
ToxoMKiU',s GE.Mi.\ATUs (Say). Wiishington Territory! California,
Eastern States.
.SVvrtv^ _r/(w///f/^^ Say, Com])!., AVr. ii, 80.
To.r<)iiifr>/n iu)t,itnx .Mac(|., Dipt. E\ot., r» Suppl., !).'5.
Minmjntpttt iji'iniiiiitii Schiner, Novara Ivxjted. (). S. Cat, Dipt. j). 12."),
AVest. Dipt., ]). ;);{().
MM. — Postorior femora simple , Mesograpta.
M.:dO(;iiAi'TA .MAHGiNATA CSay). (). S., Kern Co. Cal. ! Atlantic
States, common.
il
<J
'■^«-'] -^ll [WMUston.
LL.— Tlinrnx wifliout iiiodiaii dorsiil (Miicroous stripe, ofollar tulirrclc ii.s
usiiiil ; iibdoiiicn more oval.
N.— Ilcail ohtiisclyr'oiiiciil, front plant', l\\vv receding, tliinl joint of
anlcnn.i' orbicular .Dorns.
NN.— Front more rounded, faee le.s.s receding, third Joint of anlen.ife
large, elliptical .Xanthdgramria.
a.— Bands of abdomen entire or su!)inlerrupted /;;/>.
b. — Hands of alidtmien broadly interrupted :
Xantii()oi{.^m.\[a i)ivis,\, s|), nov.
r? V-— Fiice and rlieeks yellow, or roddisli-yellow. Front motallif
greenish black, continued as a broad stripe to the base of the aulenuie,
somewhat exi)anded below, on the sides yellowish. Antenna' black]
somewhat ivddish below on the sides of the second and third Joint near
th(,' base, third joint oval obtuse as in fdi.v, but a little smaller. Dorsum
of thora.x deei) metallic green with yellow lateral stripes, pleura' yellowish
with white pile. Scutellum a somewhat translucent yellow, its base nar-
rowly black. Abdomen : fir.st segment with a small yellow spot on each
side just under the iudteres, second segment with an oval spot on each side,
soimnvhat attenuated toward the middle, third and fourth with large rec-
tangular spots, separated by nearly their own width ; fifth with an ante-
rior fascia narrower in the middle and encroaching slightly upon the pre-
ceding segment. Legs yellow, anterior and middle femora sonu'tiiues
narrowly bn wn aniiulale near the 1)ase, posterior legs mostly brownish
or blackish, e.\:'cpt the base of femora and knees. Wings hyaline, with a
smoky tinge, stigma yellowish. Long. corp. 9-Umm. Eight specimens.
Washington Territory.
VII.
J.— Small cross-vein before the middle of the discal lell.
2. — Antenna' short.
a. — ilarginal cell open.
aa.--Face tuberculate, hyi)erstoma not produced.
*•— Abdomen oval.
ttf.— Black, or greenish. black, with yellow markuigs.
§^• — Fivee wholly, or in iiart, yellow,
r-.— Dorsum of thorax uniform, without lateral stripes.
O.— Thickly pilose species ; abd' men (piite oval, broader bevoud the mid-
tile : face iierpendicular, sr.inewhat projecting below anil reachinn- far
back untler the eyes, (iiasal i)ortit)n of abijtmien yellow, ternTinal
portit)n black, wings with dark spot. /,. Incovnm) Leucozona.
Li:tj( o/.ti.NA i.rt tuiiM (Linne), Schiner— Meig. Beschr. ill, ;il;] ; Tab. 30,
f. 27 {Syrphus) ; Mt. Hood, Oregon ! Europe ; North America.
OO.— Rather l)are species ; abdomen with yellow bands, either all en-
• tiri', or one or all inlerruptetl.
P.— Fyes of male with an "rea t)f enlarged facets above ; front very
convex : hypopygium very small. . .'.' Catabomba.
Cat.\1!0MI1a I'VUastui (Linne), (). S. Meig., System Beschr. iii (.SV//'.
W illi.-tiiii.i ''-l-J I May I'l.
plum.) Kuroiic iiiul ^Vcstcni Aincricii. Very iilnindaiit i?i tlio Pacijc rc-
p;i()ns.
PP. — Eyes of lualc witlmut area (if rii!ai'u:'(l facets alioNc; Iroul didiIit-
atcly CMiix'cx ; liypopyiiium imi wvy small,
Q. — Sixtli aliiloiuinal scLiiucnt of male as loim' as two prcffiliiiL!; tosctlior,
but narrower, soincwliat tiiliular, unsymmctrical ; on uiHlcisidi; of
seventh sei;:nient two loniT liiieaf siil) jiafallel appendaiies, ai'iaiate,
hidenticniate at end, einiiedded in grooves wln'ii at rest. In llie fe-
male fifth scLTinent lialf as \tn\'S. as precedinu,-. Scailellimi nii;e!i
raiseil, exposinu' inetanolum Eiipeodes.
EriMCdDKs voLicnis Ct. S., West Dipt., ;!'2l). AVashinixton Territory,
I\ern eonnty, Califoniiii. I Nevada, I'tali, Colorado, common.
QQ. — IlypoiiyLiiuni without slender a]ipeinla;:'es, sixth seinnent of male
not jieeuiiar ; fifth segment of female one-third or one lourth as
long as pi'cceiling.
R.^TIiird loiiiritndinal vein witli a di>tinet sinuosity ; third joint <if
antenna' elongateoxal Didea.
Talile of Sjieeies :
(/.. — -'rinrd joint of antenna' obtusely pointed; third longitudinal vein,
-with a considerable sinuosity. .\b(lonnnal cross-l):,nd of second and
tliird abdonnnal segments broader towards, liut not rpiite reaching,
the lateral marLiin fi/xripcu.
(III. — Third joint of antenna' more evenly oval: the tiurd longitudinal
vein less sinuous ;
//.— .Abilominal cross-bands attenuated at outer eiuls, and usually ([uite
meeting the lateral mai'gins :
T)mt':.\ I.AXA (). S.. Cat. Dipt. -.'ir). White Mts.; Mt. Hood, Oregon ;
Washinglfui Ti'rr, !
h/i. — .Vbdominal cross-bands nearly obsolete :
■' Dini'.A Ai.( ii>i( !■:.
.s'// /•/;// v.s' Alciilici'. WalUer, T.isI, etc., iii p. ■"):',). lluilson I?ay Terr. ;
Oston Saeken Cat. Dipt., '.2d \a\.. p. .'U, noie 20.").
A single specnnen from Mt. liood. Oregon, resr'mliles I), lit.ni very
much, but the two small ovai yellow spots of the second segment, the re-
maining segments bi'ing dark metallic green with an ojiaiiue, black longi-
tudinal line, stem to indicate a distinct species, and apparently Walker's
Alridii-r. The generic dillerences of both tlu'>e species, however, from
some specii's of .s'///'y»/// (( .r/., >'. Idjijionir/t.s), are feeble.
RR. — Third hmgituiliiKil vein straight, or gently eurveil ; third joint of
antenna' sIku'I oval " Syrphus.
This ireiius ap[iears to be a prominent one in the Wi'stern regions ;
maiM' of the lla^icrn sjieeie-* appear, and others have strong resemblance-*.
Two Sjieeies whicli present well marked characters, I (le--eribe as new.
The following table contains, ■ 1th the exception of dliuidi'itii:*. tiir.siitiifi,
iuul finnijii aids, all of the known species north of Mexico. It is composed
iss-j.j
:n3
iWillisli.il.
of th(! two ttiblcs given by Oston Sarkfii error. IJost. Snc. N. II., IMTo,
]->. l;;s, anil W(<l. Dipt., p. o~"»), uiiilcil, witli thci addilioii ol tUo species
herein (le.-crilieil.
Syhimius.
a. — Seeoiul ami third cross hands of ahdoinm never interrupted I>.
— Three principal cross. h.ands liroadly interrupied ''.
b. — First crossliaiid broadly ;ind distinctly intei'riipled in both sexes. ...c.
— First cr()ss-l);ind narrowly interrupted in the male ; not interiaipted in
the female /'.
c. — Abdomen ehjiigated. narrrow, linear ilitu mipeit.
— Ab(h)m. n oval d.
d. — Femiira black at the base ''.
— Fenioi'a yi'llow at the base riht sii , , itrnfritni.
e. — .Miildiuinal cross bands do not reach the lateral marizins //.
— .Miiloniinal ci'oss-banils reach cpiite tlu' lateral margins /.
/. — I'lyes pubescent tnrct(.i.
— I']yes trlahrous rihci^ii q*.
(J. — Cross baiuls allenuati'd on the sides opiinilor.
— ('ross-l)ands reach the sides in nearly their full width ; not attenuated
near the er.ds l.txunirii.
ft. — F.ace yellow (ibhreriulnx.
— Face with brown stripe aiiifrifdinii'.
i. — Abdomen elongated, narrow, linear j.
— .Vbdomen oval /.
j. — Fyes i)idiescent nlnluiH.-i, s[). nov.
Eyes glabrous /..
k.- — .\ntemia' inserli'd on yellow gnuind initb( llitdrxiK.
— .Vntenn.-e insert(,'d on bhuk ground ^t iiiculnhix.
I. — Fyes pubescent vi.
— Eyes glabrous n.
in. — Alidomimil spots st raight //.
— Abdominal spots coarctate in the middle, souiclimes broken in two ;
^ iiiiiiihipis.
' ' " '( iiiWudcnK.
n. — Face yellow ; third longitudinal vein straight ro/i/mitii.r.
— Facial stripe anc front black rihttlnnx, sp. nov.
0. — Abdominal spots lunate, face with black on the tuliercle . .hiiiihinii'ux.
— .Vbdominal spots straight, lace \\ithoul black. . . .(llyjuiirtux. >p. nov.
Sviipurs i.Ai'i'ONK t s Zelt., Dipt., Seaiul. ii, 701, ;.. Wyonung 'i'err.,
Kansas, Oreii'on. Southern California, Xew Kn'j.')and ! Crcenland, Furope.
Specimens laiieii in ConiU'ctieul. late in Oelober. lenc the sinuosjiy oi'thc
third \eiii as strongly marked as in any Western ones, 'i'lc s|u'cies is
wides|U'ead and common.
Syiu'IUs oriNATOK O. S., West. Dipt., :!"2T, Oregon, Washington Terr.,
face conspicuousl V brown or black in the mi(hlle.
314
[Miiy 1''.
^■'"^'""■^ .,,. ...tvv..ntv-nves,M..Mm..nsaro
. . v,nvvvcullvafommnM si-.'icn a- i
Califurnuv! AVP'^'^^^ • ^ -lo.,. .
:,, „,v toll'-''"""- . . n ^ Pr Bos. Soc. 'N.'f- »'■•'■• ...,,„,„
,„■< uir.Ksn l/nuu", <>• S-. ' ^; ,, ,,. siuTimcns with the
^^'I'^'vun UelVnuorahlac-U, ^^^-'^-^''.^I^^Lu.u Co.. CaUlonu..
basal portion oi AVf-t. l)ipt> •*~'^ ^
*Sv,u..ns ruoriuTrs O. b., ^^_^^ ^^^^
^•3SS,^^-- -— "■
lustre, a. <1 '■>'" ,„„„ ,,,„,.k in ll"' 1"«'' l'''"',, .,. ,-,Ui' lW!irl,nr«»
».'."■""* ■ '„.cf..."..l...-. S.T.."."''' '■> .■',,,. I ,.-.» ..l..<-k. "■.■""""'
,,■„■. "«'•■■;'"■ ,H....-al .....r?i..«. """*'':"'""■, ,;a,ll.. in.i.v, ".■^■i.t
l...lt ■" »'" '" '-,„„, 11,0 ......Me, y.'"';»- ^^"',- „,;„,l, OiTS"...
„r„w.,. L....g. "•>"-'- ""
lalV,.- ?.■.•-.. W;>'l- ' |,,„,u al Ite '«'»?• '^' ..,, so.'oi..! a...l
,o...»«..." "'"";" .";',S,m »l...t^ l'"-' '■"•'■' l'»" "?" ; ,: .opara..'.. "V
''"« '»■■" "' wt,, V atl." '"■ "■'■ "" ""■ ™"'iftU «"..,..« on U.o
1S.S2.J
SIJ
Oi.J
fWillistoii.
and 1,:,.,. or,ihh. ,,,,„,„ ,„ .M-ow„i.l,-hl;uk. Win,, .in,,-.] ^vi.h l.nuvnisl.
s,.,„.. a.>k,.r „,inl lon.in„,i,.:.l v.in v..,,- sli.luly ..u-vcd. Lou^:
t-mp. 'J-10 mm. l-.,nr s,„.rinK.ns. VrMsi,in.ri.,„ T,.r.
VIII.
J.-Sma]l cross-vein l.rforo tlu- muUU..., „f the discal cell
". — .M.-ifiiiiial (cll ()|i(;ii.
""■*:;:*''"';•; '"'"■'■'•mate ..r hypciNtom:) i)r<)dn(vd.
'■"llulprd!''" ••"""''^■^'■^' t"^^'"-'! ""^ l'^-- '»mv .,r l.-s. el,,!,-
S.-P,,.t,.rinr f,.,nnra slender ; wini^^s usuallv with hn.wn ; faee tu]„.reu
I''"'; li.NP'T>lo,aareirea.ing; l.-np.r, nu.re siend.r speeies. . . ! . . .
Bacha i(h-:iptiiiiinx).
Tl,e dillerem.e- he,n-e, n these two ^enera I canno, sa,i.n,c,orilv n.d<o
^- .:tve two spe,aes ..f i;.,.^,, iVom California, hoih of uhiel. see.u
on
dill'ervMl from ;
*HA<n. ,.KM,u (). S.. We>, Dip,., 'J:;,. (,.,.. Xew Mexieo and •
^UAdtA AN.,,sTA(). S., WeM Dipt., :]:;^, Calilon
rnia.
pe-
SS.-Posterior iVnu.ra sv ollen ; hyperston.a produeed ; short, Muall s
T.-lIyprrslomaprodu.vd anleriorlv, in l.rolile (hvplv eoneave fro.n
j,.nt..nne to ,,,,: ndrd j-nnr of ante,n,n. .u'ar v\ S^^^^^^^
fourth longitudinal vein joins the third in a righ, ' ,r aeu'e a,;:,;"';
Sphegiiia.
vvH^'whii's";'''"'" r"""^'"" '''■■•••'""•>■ -'^ <^--"" -n-esp,.nd prelty
VN.II M,hs. ..onvTA Lw., S. iNK.s.ATA Lw. an,lS. .innrvriMsrw
).iit m the absence of better material in ti.is ...nus [ w
describe them.
■ill not venture to
TT.— If
yperstoma produced more dow
AsrtA mkt.\li,k:a, sp. ii,,v.
J^-~^'T '""''""■ ""■"^"'' '"'""'■'' ''''"•'- ^''*^'!"- t'x' latter while
x'llinose. Antenme bla.k. third Join, brownisl, hl,.H.k below, n.ar the
-ase n.d. llu.rax n,e,allie-green bia-.k, liuHy pun,.,u>v,l, ,\bd,„nen like
'^' tlH.ra.v. the third s..,,nen,. in the tVanale. with two, s.nall .,r in
1
bas
the
tMict,spo,snearthe front; in the n,al,. the front half eve-p, the anodes red
^'°; "■ ''^' '""•'■•'"'• "'•'! '"i^l<ll'' l-'-nora. except the base and :^^,.U the
postertor coxa., fen.,u-a, except the ba.allounh, tibia., except th.. ba.d
tMml and ttps, and the pos,e,-ior meta,a,-si black, other pa lis li.ht veHow.
Winiis hyaline. Lon^^ corp. 1-.-) mm. ' "
Three s|)(!(.imens, Ml, Hood, ()|.,,o.on.
ri<o.-. A..,.,!. ctLos. so... XX. 11-. o^. riMATi:j,Ar.,,s.rS l>^«
r
Willis'oii.l
31()
[Miiy 1.1,
Tljo bliirk of th<; 1(',<,'3, in ono specimen, includes a larger part, witli a
portion of lh(i anterior and niiiMle tarsi.
IX.
J.— Sinal] cros.s-vcin before tlie niidille of tliscal cell.
3. — Antenna' sliorter than the head.
aa. — ]Mariiinal cell closed and peliolate.
U. — Second and third Joints of antenna' elr)nsate ; ari.sta very densely
plumose, appeariujf like a solid mass. . . ^Copestyhim.
* Coi'ESTYi.rM MAU(wx.\TUM f^^Hiay), (). S. Say, Compl. \Vr. ii, :5()()
( VoJturlht). Mexico, Texas.
UU.— Third jniiit of antennte elongate; arista feathery
c Volucella,
P'"'""^'^' \ Temnocera.
* VoLUCKLL.v AviDA (). S., AVcst Dipt., '533. C'.vlifornia. ^^Fexico.
VOMM'KM-A sATiu <>. S., 1. c, Colorado. Ctali I
VoLUCKLFiA r A 9(1 ATA Maccj., Dipt. Exd., ii. 2, 21, 1. Western
Kansas I Texas, Colorado, ilexico.
. YOLICKLLA FACIALIS, sp. noV.
(^ ^. . ("losely related to V. crerta "Walk., but differs in the face being
quite yellow, with yellow pile, and the dorsum of thorax and pleurae be-
ing covered with black pile.
Face yellow, yellow pilose, cheeks Idack, shining, bvre. Antennic :
first two joints brownish-black, third joint red, or reddish-brown, arista
darker, black plumose Front in female j'ellow, darker at the vertex,
yellow i)ilose ; frontal triangle {r^) black, or brown with shorter yellow
pile, vertex with tuft of long yellow pile. Tiionix black, shining, the dor-
sum broadly black pilose, in front and behind and on the sides with
longer yellow pile, pleura^ with black pile. Abdomen black, shining,
second segment except the middh^ third or half, and narrow i)osterior
border, light yellow, the narrow jxisterior part of third, the fourth and
fifth segments- conspicuously red pilose, other parts of abdouK-n with
shorter black pile. Legs black, black pilose, basal portion of tibije and
all the tarsi dark red. Wings hyaline, the veins with brown clouds, a
brown spot opposite the small cross-vein. Long. corp. 1-1-15 mm. Thiv.e
specimens. California.
The posterior part of the abdomen in V. crerta is usually black pilose
without any trace of the red, but rarely in some specimims the abdomen
is markinl precisely like fdrialls, and hence it is quite probable that
s lecimens of the California species may sometimes lack the rufous pile.
The black pile of the thorax will at once distinguish the species or
variety if it should prove to be such, as in a large number of specimens of
eceetib I have never found any with such thoracic pile. However, as
regards its specific distinction, see Eristnlis flavipes mcbinastoninH Lw.
^
IHSL'.]
;u"
[Wlllistuli.
Tlic. 'j;f'nns 'IVmnofn-ii !<; nn \in-;iti-f;ictory oiir, ;niil I Iirlicvi' du'^Ii; to
1)1! siippi-c^scd. Till- chiiMctiT-i rdinl ii|,;,n :,ri> tin; nioiv slcu.liT iliiril
joini MfanlL'iiiia-, an. I tin; pn'srnce of l)risilc>, on tlic scuh'lliim.
I ilo not know (Mtlicr of tlic follosviiiii s|)e<-ii's :
*Ti;.M.\oci;UA SKTKiKK.v (). S. \V(.st Dipt., :!:!t, .\<\v >rcxifo.
*Tkmn-o(KU.\ MKCACKi-iiAi.A l,\v., (.'ciUur. 1."), Tu. California.
//
JJ.-Th small rros-^-vciii at or hi'yoml the niidilh' of tlu: di-cal ccli,
olili(iiic.
«. — .Viitcnna' with a (li<lii,( lly (1 irsal l)i-i->li('.
ij. — Tiiird lon;iiliidinal vein (l(('|)ly siinioii-;.
J'. — Miii\u'iiial (■(■II cjo.-.c'd and pcliolaU,'.
v.— Tiiorax ni'V('r with yellow spots ; winixs hyaline or with a dark >pot ;
face oblur-ely tuliei-cniale " Eristalis.
Ei,!z;liteen species of Kristalis ai'c recounii/.ed hy I'.aron dsten Sack.'n as
liiivini!; been descriiied from America, norlli of >[e\-ico. More than twice;
ius many names have lieen iiiven, chietly by AValker and :\Ia((piart, but
tht.' facilities enji)yed by Ostcn Sackcn, toii'i-llier with his well-known ac-
nuMcy and faithfnlness, render it uiinccu'ssary to any furtiiur discuss the
ino-«t of lliem at present.
Since the publication of this catalogue two species hav<.' hecn published
by IJiH-ni in the AiiihiJvs ihx S„r. h'„t, d, Fiuiucr, IMSO, 'JKi-'-.MT. /:,'. ,/<.'/■, /^«(
is iiiven below in i)arl : A', -.omihis --_ I], frinixn rs'/s Wicd.
I hav(,' endeav(u-ed to tabulate l)elow all of tin; sijccies known to me, and
have added the diaiiitoses, or descriptions, of all the remaining, wiili the
additi(Mi of what I identify as E. .U, /:/,'i,t''' AVied., a South America-,
species = /i". miilrorJus (.). S. (non Walker, unde-erilx'd, see cataloLMe,
etc.), toirether with two lu-w ones. Tiie g.Mius though laru'e, and espc iall\
predominating in America, is readily delined, .showing comjiaraf'.ely lit-
tle structural variiUion. The eyes are contiguous, or suii-conligi.ous, us i-
ally pilose, although in .some species, ixufeiui.i; occupying only a spot in the
?-'iiddle ; in inn uk they are nearly l)are, being sparsely pilose near the top.
The third joint of the antenna' is sub-(iuadrate, tlius .'it (uicc; distinguishing
it from ViiliicfUit i\ut\ T,iiiiinrn',i. The fu'e is never produced, in nearlv
iill of the species with a not very prominent tubercle, Avitii a median stripe
and che(!ks black, bare, and shining. From Milixi<i and Pkn>i>iU<i it mav
readily be distinguished by the absence of distinct y(dlow >pots or stripes
on the dorsum of the tliorax, which is, however, sometimes distinctly fas-
ciate or viltate with dull gray or olivaceous ; from the latter genus also by
the absence of pubescence on the wing, rhough, indeed, this rhar;icter is
only relalive. There is a tendency to dill ■fences of coloration and mark-
ings between the mule and female, sometimes so striking as to cause one
to doubt their relationslii).. l^neh diflerences may consist in tlu; ab-
sence of yellow upon the abdomen, or in the presence of stri[ies of the
WiUis..,,..] -'^^ t^'">-''''
tlionix. T\u- winu's show scarcely any variation ; tlic third loiiniludiiial is
..Ic'cply lii'iit into lliu lir>I posii-riur cell, and tin- nuiruiinal fidl is dosed,
tliu hitter eiiaraeler si'paraiin;^' it from all (■Ihcr Xorlli Auieiiean -'eneni
oxcupt the one> lueviously mentioned.
Ekistaijs.
1. Ari-ta nakcjd or indistinetly pnl)e>eent '^•
— Ari>ta pilose or distinctly pube-^cent (near the hase~) :>•
•i._Sentelliim of the same color a-- thorax, ahdoinen without limht mark-
inj;s, shinin.ii-, eyes nearly hare, spotted in life, dorsnin of thorax in
female distinctly vittate '"" "•"■
—Scutelhim yellowish translucent, li'xhter than llie thorax : alnlomen
unlcolorous, shininij; blackish, with indistinct or sul>obs()le|M sid(!
spots on second se^-munt, pile of eye mostly confined to an elongated
vertical elliptical line. Size and appearance of a honey-bee fc/ia.r.
3._Thorax with thick or long pile, posterior border ol third s,.^-inent not
velvety lilack, wings mostly Avith a brown sjiot 4.
— Thora". and al)di)men nearly bare, or willi short, not wooly pile, the
abdoi.iinal segn\ents usually with ligliler hind borders. Less
]io,„l>iii<-]\k(i ^•
4. — Tarsi red, largi; species : Intmblc bee-like •>•
— Tarsi dark, sn\aller species •'■
.-).— Thorax wholly yellow pilose above tl<icii>es.
Thorax with black pile in the middle when seen from the side
lliin'jiL'tt var. uuhmoxtoinus.
0._Abdomen with yellow or reddish on the siih's of the second sogment
only, thickly mostly black pilose (dsewliere. posterior half of third,
and the fourth segment shining ; legs black n,i>ttiinlL
Third s(;gmcnt with yellow or red, the pile of the abdomen almost
wholly yellowish, and long '•
7._Abdomeii mostly reddish-yellow with a nearly equal median black
stripe ; eyes barely meeting in the male ; legs hhwk. uKU't'iiiny. sp. nov.
—Thin! segment with a smaller reddish-yellow spot in the side, second
segment velvety black, third with ii triangular velvety expansion in
jYojii vi'cidoitiiJift, sp. nov.
y._Third abdominal segment with a posterior velvety black cro.ss-l)an(l
lint titti rrH,dal in the middle •^•
—Third abdominal segment with a distinctly interrupted band, or else
wholly sliiiiiiig. Not with a comidete band l-'-
i). 'J"iH)rax with transverse olivaceous fasci.e, front narrow above ( ' ).10.
— Thora.x without such fascia- 1^
10.— Hind femora not swollen, second segment of abdomen with large
si)()ts, third segment in the male, with anterior rectangular spots
Avanting in the female, and hind borders of second, third and fourth
segments yellow. Legs varying from ahuost wholly yellow with
black on tips of hind femora and tibia', to black with yellow knees. . .
tr<iniiCt:rKns-
I
]<'^2] '*'•' fWllllst'm.
— Iliml t"iinnr;i ili-linrtly <\vi>l|i>ii. Ii.iinl- nf tln)i:i\ cun^iiicuuii-, tliir.l
SCJ,Illriit ol' ;il)il(i|ili'll in fi'lll:l!(' nt'lrli willi |T(1 or yi'llnw >iilr s|>(il>.
utlicrwisc rcsriuliliiiir llir inrvinii- sincic- very iniic'i, iiiul liki- it
(|nilr va rill I lie i-inrtcrniii.
1 1 . — Tliinl ^I'unii'iit of iihdniiiin linmilly uii'l ciiiisiiiciioiwly ycllnw, juiiiiiii:
the yellow (jf'llic s('<'uii(I scLCniiMit in front, llic velvety faseia ol' tliinl
se2;n\(Mil ahliri'x iated on tlic sides ; thorax with indistinct stripes ; eyes
nfniale tollellill'^ eaell oth'T \-ery sli<^htly 'Mi'i'jiii!' Wieil.
— Tliinl seLrinenl ofalidonien willioiit yellow, eyes of male broadly eon-
ti'inoiis \'l
Vi. — rnuil of female iiarn)\v. Deep liliiisli-l)la<'k, xailelliim scarcely dif
fereiit. the abdomen with dull or ob-olete lrian:j,-nlar <p()ls. the hind
borders of ilic se'^'inents indistinct or ab-ent. (onical ; tips of femoni.
the po-ierior at the base especially in the teiuiile, ba-al half of tibia',
and more or less of basal joints of anterior and midille tar~i, liiflit
y(dlo\v. WiiiLis with a dark sjiot sfi.roruin.
— Fnint of female bniad. Ij^rhtcr markin.iis of abdomen (the lateral tri-
an;j;les unci jiosterior bonlers) nsnally quite di>tiiict, sometimes
nearly oli-olete : third and f nirtli <euMiients with a v(dvely mediiin tri-
aii'iidar expansion with its base in IVont ; tijis of femoni. iiiiterior and
middle tibia', except tips and basal half of iio>terior tibi;e ycHow.
"NViniis soiiielimes with a distinct brown spot liirt'is.
V.\. — Third >eLrmeiit without Cor with very minute) v(dvety markings,
abihimen mostly >Iiinin!j;, second, Ihinl. and fourth se;j;nieuts with
frinn'c r)f whit<' pile !-'•
— Third sc;i;nient of .ibdomen with an anterior sjiot, iind a posterior
interrupted vcdvety black fascia, second se;:;meMt with sub-ob^ohMe
triaii:i:ular ycdlow sjiols, ]iosterior border of segments narrow or in-
distinct ; basal half of all the tibia' yellowish-wliilf. Wind's pure
h valine iliiiiiiliiifxs.
14. — Second seument of abdoiiKMi with yellow triani:les, and a posterior
uninterrupted or subinierrupted vcdvety cn)^s-band, posterior mar-
gin of spuinents '^-4 3'ellowisli-white, with a friiiLre of pale uolden yel-
h)W hairs. (Lenu'th !)-!:> mm.) x//j>:ifor.
— Second se'.5inent except tlie metallic side spots that extend the whole
lenjjth of the segment, \(dvety black : tliinl segmi'iit with a V(dvety
triangle in tVont, the fourth with similar, but very small : the yellow-
ish-white hind bonh'i-s fringed less consiiicuously with light colored
]iile fl/i>ii,<<ii, sp. nov.
/>(V'(//.y ///(»///./^/.<( Lw., Centnr. vi, (i8. licd Iliver.
Diagnosis, translation. •,. • "Sub-brassy bi,.ck, shining, clothed with
rather long lutescenl pile ('imbe'); front broad, near the eyes black
l»ilose. but tlie vertex itself with luleous jiile ; eyes pilose ; antenna' red-
dish ferruginous, the first two joints black, the aristii pihise -, face, except
the usual Htrijies yellow, with diliitely bitesceiit pih' and pollen : siaitel-
fw
Williston.]
320
[May Ifi,
I
lii'.u wlioll}^ Icstaccous ; cacli scjrnicnt, of tho abdomen except, the first
with a lilaek posterior fascia, sccoikI ami tliifd emai-giiiate ami velutinoiis,
the tbllowiii'j; suh-sliiiiiii!; ami in the i)()steri()r m.iruiii, very narrowly
yellow. Feel lilaek, extreme apex of the femora, the basal half of ante-
rior ami posterior tibia', the midtlle til)i;e except the apical third and tlie
first Joint of the niiddk; tarsi, pallid yellowish ; ' ahe hyalina', vena disci
colore snbfnsco late circnmfusis.' " Long. corp. t)[ lin., Long. ill.
4jlin.
/•Jri^f'il/.H iihai'iiri'f^ '\.\y., 1. c. '>T. lied IJivcr.
Diagnosis, tran'^lation. " ,■. Urassy black shining, clothed ^vith rather
lonji' <liliitely bitescent cineronsiiile ; front broad, above bhick pilose ; eyes
pilo>e. antenna' reddisli fei-rnginons, lirst two joints black, -arista pilose,
face except the usual stripes yellow t(!stace'>us, white pollinose and white-
pilose ; scutellnm brown, black near the base ; each abdominal segment
except tlie first with a postorim' black fasein, not emarginatc ami with a very
slender posterior yellow margin ; feet black, apex and baseof;ill the femora,
tlie iiasal third of anterior and posterior tibi.'C, intermediate til)ia' except the
ai)ex, and tin; first two joints of all the tarsi pallid yellowish ; wings pure
hyaline, veins of the disc clomled with fuscous. Long. corp. o-.li lin.,
long, al., 1;',— IH lin.
EuTST.\T,is T,ATiri!ONS Lw., 1. c. ()."). Matamoras, Texas, Towa.
Diagnosis, translation. "c5''V- Black, moderately shining, wholly pal-
lidly pilose ; antenn.-e fuscous, seta' bare, Inteous ; scutellum testace(nis ;
second segment of the abdonien with two sub-triangnhir testaceous spots,
posterior margin iiallid, posterior margins of the following segments pal-
lid, 'in front pallidly pollinose; feet black, the knees, tibia>, except the
apex, and the base of the intermediate tarsi, pallid fiavescent ; eyes of the
male contiguous, in tlie female by the front broadly separated. Long. corp.
r^!^^-:)}, lin., long. al. 1,1-1^ liti.
EriftiiJlK Ktrirt'px Lw., 1. c. ()i. While :Mts., Canada.
Diagnosis, translation. " ■'\ Black, shining; head wholly concolorons,
antenna' obscurely rufous, arista bare; sciitcllum and two spots of tin.'
second abdonunal segment brown ; posterior margin of tin; second, third,
and fourth abdominal segments pallid yellow : win'i's hyaline, costa ex-
cept the apical third fuscous-clouded. Long. corp. 1;',-!,'V lin., long ul.
;!;; lin."
h'rin/,ilif( iiilosuf Lw., 1. c. TO. Oreenland.
Dianiiosis, translation. "o'"' + - Black, thickly clothed witli long yellow
l)ile ; eyes black pilose; antenna' black, arista bare: face black ; thorax
unieolovous, opaque; scutcllum lutcoiis; lirst two alidomiiial segments
opaque, secured on each side with a dilutely lutesceiit s|)ot ; third segment
black, 'vith two opa([ini spots, confiuenl in an abbreviated fascia ; two ul-
timate segments lirassy [luetallic]. blacl-;, shining, with a minute triangu-
lar spot, opacpie ; pile of llie (hu'sum lupiiious, on the sides of tlie middle
1S82.]
321
rWilliston.
hlark, rcniaiiulor yollow ; wincjs puro Iiyalinc, veins fuscous lilack, in tlic
IVniale willi blackish spots. — Lon,!^. corp. ')h-^')\ liii., lonp;. al. 4.',-.")^ lin."
ErinlaliH (vstrifor/nis Walker, List, etc., iii, ~u'-> (S//rphuK). Hudson's
Bay Territory,
"Mas. Nijrer, thoracis pilis anticis nigris pootecis fulvis, seutello fulvo,
abdomine jtilis albis nigrls fulvisquo fasciato, anteunis piceis, pcdibus
nij^ris, nlis limpidis fusco unimaeulatis.
" Body black ; head clothed with dull tawny hairs, shining and promi-
nent in front ; mouth pitchy ; feelers pitchy ; bristle ferruginous, downy;
eyes pitchy, each with abroad stripe of short black hairs ; all the facets very
small ; chest clot lied with short black hairs, and or. the hinder part with
pale tawny hairs ; scutcheon tawn}', very thicklj' clothed with pale tawny
hairs ; abdomen nearly :)val, broader and a little longer than the chest,
cldtliecl with white hairs at the base, with black hairs in the middle, and
witli liright tawny hairs towards the tip; legs black, clothed with short
black hair; knees pitchy ; shanks and feet clothed beneath with tawny
down : bind Hu't tawny; claws and foot cushions tawny; tips of cltiws
black ; wings colorless ; largo dtirk brown spot in the disk ; wing ribs
pitchy ; veins black, ferruginous towards the base and along the free
1)orders ; poisers ferruginous. Lengtii of the body 7 lines ; of the wings
[spread] 14 lines."
Erltitalis iiUiiri'pH ^.^lacci., Dipt. E.Kot. ii, 2, .lO, 41, Carolina.
" Ater. Thorace antice duabus fasciis transversus albidis. Abdominis
primo, secunilo terliofiue segmentis maculis lateralibus llavis. Facie fron-
ti(pie albis. Long. 4 1. n'-"
"Face testacie.- a duvet blancet bande nue, luisaute. Partic anterieuro
du fnuil a duvet et polls blancs. Antennes testacoes. Yeux nus. Thorax
d'uu noir velonte ; la seconde bande transversale sur la suture ; ecusson
fauv(^ Abdomen, les taches laterales laissant un espace droit entn'dles ;
celles du troisieine segment n'atteignant jias le sord posterieur ; incisions
jaunes ; quatrieme a pelits jioils noire. Cuisses noires, a gcnou.v fauves ;
jauibes jaunes, a extremile l)raun( ; tarses noirs. J^alanciers jaunes. Ailes
hyalines ; a base un j)eu jaunatre ; cellule basilaire externe s'etendant jus-
(|u'a la moitie de la discoidale."
Eiixtiiliti ihirrim Rigot, Dipt. Xouv. xxi, Annal Eiit. So<'. Fr., 1^*78, 2\(>.
Diagnosis, translation. f<\ Fiyes jiilose, arista at the base brielly pilose
(similar to E, (irliiinforum) ; antenna' reddish-brown ; face black, on the
sides obscurely cinereous pilose: thorax black, densely fulvous i)ilose ;
SiMitellum fulvous; tegnhe testaceous ; abdomen, second segment, on each
side, with a broad spot, triangular, fulvous, third with similar, but nar-
rower, spots, narrowly margined with yellow ; femoi'a obscurely reddish-
brown, knees and tibia' pallid testaceous ; apex broadly reddish-l)rown,
tarsi obscurely red, ajtrx slightly infuscate; wings nearly hyaline, bas(!
and external border, dilutely and very pallidly inl'usrated. Long. Ilhniu.
North .\nu^rica.
Williston.]
322
f^f!ly n».
Kkistai.isi KN.w (f, in III'). >Iciu-. .\ tliintic MudMidrllc Stiitcs, \N';i>hii).iit<ijj
Tcrriipry ! I'liiroiu', Asi;i, AlVic;!. A ^inulc -pcciincn from ilic I'acil'ic
co;ist a'ii-crs in rvi ry rcspcc -Avilh Eiisiura oni-s. Tiic (li>tnhnlii>a of this
s])('ci('s is rfin;iri<ab]c ; iillliouuli at i)rcscnr vi ry al)un(laiit in llic rciiion of
iS'mv Kniiiaiul, A was puvcr oi)si;rvi;cl or kii()'.vn lo collectors longer ago
than ISM :
Eiti.sTAi.is i'i,.\\ ii'i:s, var mi.t.axostomus Lv ., Ccntiir. v\., 09. I
liave a siniilc IVniale s]i(cini<Mi tVon\ Oi-cjioii that [ doul)! fully refer to this
species. While 1h(> dorsum of thelhon»\ is l»lai-k pilose the yellowish pile
of thealidoinen is eon lined I o the terminal seuinents. I have eoUeeted
large numbers o^ jhn-ijux in Conneelieut, and among lliem I have found
ti/pii'/il speeiiuens (,f iinhnu»<tu)iil and others agreeing ipiile wiili iiw: speei-
iiien from (Oregon, -while still others iiave the yellowish pile of the alido-
mcn more or less inlernuxed with black. A typical indtinoxlonnin pro-
senls a very dilferenl appearance from Jl'd'i/icn, and yet from the col-
lection I have, I doul)t the speeiiic dislinc-tion. The name iiiih()iost<)inii!<
uiay Ite retained, however, to express the dillerence, more particularly
of the dorsal thoracic jiile.
EiiisTAi.is sriPATo!! O. S,. West. Dipt., IMG. Colorado, ■\Ves|(;rn
Ivnni>as ! New Mexico, California.
EiiisTAi.is Miurrs I.w., Cent, vi, (iCi ; O. S. West. Dipt., li:!"). Wash.
Terr., Oregon, California, Colorado ! .V very common species, over thirty
specinu-'us are in my collection. Tiiey show a considerable variation as
observed by Oslen Sacken (1. c.).
EiiisTAi.is (•'.) Mkiokmi \Vie(l., Aus. Zwui. Ins. ii, ITT, :>•"), pi. x., fig. IT).
(]■:. iiinlroi'hmi). S.), Brazil (Wii'd.) New England '. Utah, Alaska (see
(). Sacken. West. Dipt, :V.V,). This species agrees so closely with Wied-
luan's figure and description of Mrii/aiii from ]>ra/.il, that I t)eliev(! it to be
the same. I shall, however, send specimens for c(Uuparisou with South
American ones.
EUISTAI.IS MONTA" I S, Sp. IIOV.
^\_].;y,.s thickly pilose, sub-contiguous : front and face reddish-black
•\vith yellow lule, the facial stripe and cheeks bliu'k, shining, antenme
brownish-black, arista bare. Thorax black, densely covered with yellow
])ile, the -cutellnm yellow. .VlMlomen reddish-yellow, with thick reddislr
yellow pile, lirst segment lilaek ; --eeoud segmeiil In the middle op. [Uc;
black, narroweil behinil, in the third seguieni the black is contiued lo a.
broad nu'(lian stripe, opacjut! in front, shining behind ; fourth segment
similar, wholly shining, hypopygium black. J/cgs black willi black i)ile,
all tb'- lil)ia' at the base yellowish-red. Wings hyaline with a brown spot.
Eong. corp. I'J mm. One specimen. Wyoming Territory.
Elllf^TAI.IS ()( (IDKNrAI.ls, S|). nov.
J^9, — Eyes ]^ilosc, front ( , ) brownish black, dusted M'ith yellow on
the skies, face on the sides thickly covereil wiih sanu' colored ilusl. and
\\
1SS2.]
32:j
[^ViIlist^ll.
^v]lilisll yellow pile, mc<li:iii siripc aiid (■licc!<s shiniiic liliici< ; ;mtciiii;i'
rL'ddisli-lirowi ;irist;i n'd piibc-^ccnt. '^rimrax Mark, witli ratl.cr ^lllll•l,
tlik'k, ycllov ,illi'; scutcllum suli transluccnl yrjlow with longer pile.
Aliiloiiieri l)la( k, thickly covcrcil with yellow pile iiiofe or less iiitiTinixeil
with I'laek at the incisures, second sen'iucnt on the sides broadly yellow,
in the middle w holly opaque ; third scLini(>nt on the sides with smiillcr
reddish spots, extcndin,^' onc-lmlf or two-thirds of the way buck, and a
broad, shininLr cross-band narrowly inlerrupled in the middle ; 1'oiirth
ReirnK'nt sliiiun?^, with a small opiupie spot in front. Leiis bbick with
black pile, knees and l)asal third of all the tibia' yellow. \\'in,ij;s hy;iline
Avith a small d;irk brown s[)()t. J.ong. corp. 10-12 mm. Four specimens.
Washington Territory.
Eristalh Ilronsii, sp. nov.
Q. — Eyes with short whitish jiile ; front brownish-black in the middle,
tliickly covered with red dust oti tin." sides, ])ile below yellowish, black
near the octdli, face with whitish i)ile and yellowish wliite dust, narrowly-
shining' black in the middle, cheeks black, shininu; ; antenna' bi'ownish-
black, arista brownish-yellow, sparsely pilose. Thorax on the dorsum
brownish-olivaceous, somewhat lirassy on tlie sides ; in the middle form-
ing two rather broad stripes, inclo>ing a narrow black stripe that is
broadest beyoml the suture ; ph'ura' black with longer whitish i>ili', thi' pile
of the dorstim rather short reddish-yellow ; scutcllum reddish-brown.
Abdomen black, sub-metallic shining, with very short whitish pile, jxis-
terior margins of second, third and foiirlh segments broadly whitish-yel-
low, the velvety black occupies the whole of the nnddle of the second
segment, expanding nari'owly out ward in front of the whitish posterior
margin ; third scLi-ment has the velvety black confined to a ti'ianglc on the
anterior part, extending narrowly backw;ird ; fourth segment with a
small sjiot in front. Ia^s^^ l)lack with while pile, tips of femora and basal
third of all the tibia^ yellow. Wings byaline with an indistinct brownish
sjiot. Long. corp. 10 12 mm. Thretf specimens. Massachusetts, July ;!.
For some time I w;is inclined to consider this the female of what I
identify as A'. Jfcii/i nii Wied.
VV. — Wings covered with minute pile, brown on anterior portion: thorax
often with yellow spots Pteioptila,
Pti-.i!()1'T1la. cki(1(4i;u.\ CW'ied.), Alls. Zwci. ii, 10"), '. (iecu-gia!
Florida, Texas, Central America.
JJ.- Sm\ll cross-vein at or beyond the middle of discal cell.
M. — Arisi.i dorsal.
/?. — Third longitudinal \cii; ^\^ ejily sinuous.
yy. — .Marginal c( !1 open ; pc-lerior fi'm(H'a sw(dlen.
I'ltOC. AMI'.lt. I'lm.OS. SOC. \X. ll'J. 2o. I'lilNTI.l) AlCt'sT S, ISS.V
rt
AVilliston.] '^^4 [May 10,
"W. — Favo cnrinato seo XIII.
■WW. — Face tubuiciilivte, or i-ouikUhI, not fariiiato.
X. — Facf! of male less tulx-rciilalc llian in female, l)0(ly uniformly
blade, williout markinLrs.
Y. — Hind tibiiu of male witli a strong projecting s])ine in nruldlo.
Teiichocnemis.
YY. — TTind tibiic of male without such spine "Pterallastes.
XX. — Face alike in botli sexes, abdomen in male at least (except Mdllota)
not uniform.
Z. — Hind coxa' with spur, duller in the female, hind femora with tri-
angular protuberance, hind til)ia' with terminal spur (r{' abdomen
mostly red, .; nearly black) Polydonta.
r(/iA'i)oxTA cuKVirK.s (Wicd.), Ans. Zwei. ii, 140, !}. (). S. West.
Dipt., '.V.]H. New England ! California. The probability is that the species
somewhat doubtfully referred to this by Osten Sacken, 1, c, is the same.
ZZ. — Hind legs without such spiirs or protuberances.
a. — Third joint of antenme broad, face ('oncave l)elc,w the anten-
na' (thorax not vittatc, thickly pi'ose) abdomen without
biinds Mallota.
MaTjIjOTA S.xfKKNi, s]). nov.
MaUiitii posfir/itti O. Sacken, West. Dipt., ;5:)8.
J^. Ditl'ers from .V. (V) poxtieatu of the Eastern States in a dark brown
spot on the wing, in the marginal cell being closed in ihe bt)rder, and
in the eyes of the male not being contiguous, otherwise quite like the
Eastern species.
Frontal triangle and face gray with yellow pile, broad facial stripe and
cheeks deep black, shining; antennte i)lack, third joint more or less
brownish. Dorsum of thorax and pleura* with long dense yellow pile,
scutellum yellow, similarly pilose, abdomen deej) shining black, nearly
bare, legs deep black, with black pile, middle and posterior tarsi brownish-
red, iiostericr femora very much thickened. Wings hyaline with a large
brown spot, reaching from the origin of the third vein to the small cross-
vein, the second longitudiiml enters the costa at tip of the tlrst, not at
some distance beyond, as in the specimens T h;ive of the Eastern species.
Long. corj). 14nim. Washington Territory. Two specimens.
aa. — Third joint of antenna' ovate, face excavated or not below the an-
tenna', thorax, or at least abdomen, witinnarkings Helophilus.
Ili^r.oi'iiii.r.s LATiKKoxs Lw., Cent, iv, 7:5. Wyo. ! Northern States,
Nebraska, California.
IIi;r,()i'urr,ts mi-.xicamjs yh\cq. (][. poli/f/niiiinuis Lw. Cent. x. 55. See
also O. Sacken, Catalogue, Errata.) Apparently a A'ery common species.
1 have .seventeen specimens from Washington Territory and California.
Helophilus, sp. A small species from AVyoming, apparently undc-
.scrib(!d.
issj.l
tWilHstoii.
XII.
JJ.— Sriiiill cross-vi.'iii ul or beyond the middle of discul cell.
(i_. — Aristii dorsal.
Third lonjiitudinal vein gently curved.
8. — Arista leathery plumose.
z, — Marginal cell ojien.
b.— Tliickly ]iilose : alidomen withou.t bands, sliort. thick, arched ; liind
femora stroniilv thickened, tibi;e mueli bent ; face siraiLdil, cxicnd-
ing back under the eyes, conical, iiointed ; wings with a brown
spot ' "Arctophila.
*AiU'T()[>iin,A KLAGUANs (). S., West. Dipt., %\r>. Colorado ^lountains.
bb.— licss i)i!os(! : abdomen with bands : hind femora slender ; face trun-
(..,(,. Sericomyia.
Skiucomvia CMAr.coPYGA Lw., Cent, iii, '.30. Washington Territory,
Mt. Hood, Oregon! Sitka. A dozen siiecimcn from the two former lo-
calities, I have no doubt belong here ; the male not described by I.oew,
dillers in having tho third segment wholly opaque.
XIII.
J J. — Small cros.s-A'cin at or beyond the middle of disciil cell.
a. — Arista dorsal.
^5^J_ — Third longitudinal vein gently curved.
"cr. — Arista bare or pubescent.
c._:\r;u-ninal cell closed ; tlumix with yellow markings; abdomen fasci-
ale ; antimnie short Milesia.
cc. — ^larginal cell oi)cn.
d.— Lonsi', slender, abdomen narrower toward Ibeba'^e ('wiuL^smore
or less brownish) Ocyptamus (I'.aelia).
dd. — Abdomen never linc;ir nr elub-sbaitcd.
e. — Face distinctly carinate, convex or nearly perpeiidictdar in
profile, hyperstoma not itroduced. eye> bare, hind b'lnora
incrassatc, with a triangular protuberance Tropidia.
TuomnrA (jtrADU.VTA (Sayl. Compl. Wr. 1, 1 i {Xnlohi). Wabliington
Terr., California, New England !
-Face withoitt a dis'inct median ridge, or carina, or if somewhat
cai'inated. the byiierstoma produeed.
f, — "All th(! feni'ora strongly thickened and spino-e lielow ; tarsi
crassale. Face luberculate ; anteniiie short, tliiid joint as bing
as two preceiling. Small cross-vein subnormal : first posterior
cell acute at outer anterior angl(>, rounded on otiirr posteri(U'
part, the section of vein at distal end ot cell, sinuate. ISody
]iroportionatelv short and broad, bare, with minute scpianne."
T,oe\v, Century v, ;1H. Small species *Lepidomyia.
ff. — All the femora not" strongly thickened ami ^pinose below. Mostly
large species.
g. — Ncarlv bare siieeies, esp'-eiiiHy on the abdomen, the pile
never long mn- dense ; eyes btire.
ee.
■Hlllli
w
AVillist<m.]
;]2G
[Miiy I'.i,
h. — Fiioc ilcscfiidiiiu' lint very little holow tlir Pj'os, iirchcd
or siilx'iiriiiiitc. never liil)(r(iilat(\
i. — Third sc^i'ment of iihdoiiien in ni:il(.' very iniieh coii-
traeleil, eylindrieiil, the liiiid femora iniieh swolli'ii,
■\viili bilid spine iieiow iit tJie ti[). Kycs very larn'e,
face small Senogaater .Maeti., Jlist. Xat. Dipt. 2.
f>cnorjfister Comfftoel:!, sp. nov.
(^■. — Head Li'lobular, large, composed almost wholly of the eyes Avliicli
meet in front for a short distance above the antenna', the vertical trianj^lo
narrow, lonir: ii small i)ut very distinct area of enlarged facets on each
side above the anteniiie. Frontal triangle and face small, the latter
arched, siibcariiiale, sjiort, eoneav(! from aiitenme to tip, yellow with sil-
very glisten, and a browiiisli median strijie. Cheeks narrow, antenna'
reddish-yellow, lirst joint veiy short, second nearly ecpiilaterally triangu-
lar, third joint oval, arista bare. Tliora.v black, with ."our narrow, but
conspiciH)Us olivaceous stripes, ihi' outer p;iir extending from the more
reddish, somewhat swollen humeri. I'leura' black, with a conspicuous
broad white-dusted vertical patch; scutellum black, yellow at the tip;
abdomen browtiish-black ; first segment as broad as thorax, nearh' black,
yellow on the sides ; second segment elongate, scarcely half as wide be-
hind, with two silvery ■ longate spots; third segment of the same length,
narrow, cylindrical, yellow in front ; fourth segment as long as preceding,
wi'h the globular hypopygium forming a spheroidal mass. Legs yellow,
hind femora much swollen, arena ed, black, becoming red at the tip, l>e-
low at the end with slender process, and bej-ond a smaller tooth-like one,
hinil tibia> arcuated with a triangular projection at the end, hind tarsi
brownish, wings nearly hyaline, third longitudinal via gently curved.
Long. Corp. VI mm., long. al. 8 mm., X. Y., Corr.ell I'lnversity. I'rof.
J, ir. Comstock.
The present species is a very interesting addition to our fauna. Hitherto,
so far as I can learn, but one species is known, »S'. cr.'.vulrscenti ^lae., 1. c.
and Dipt. E.xot. 11, -2, 72, Tab, 1:5, f. ;5, from Guiana, South Ameriiia. I
lake much pleasure in dediciting it lo Prof. Comstock, whose work in
Ihilomology is so favorably known.
ii. — Hind fei.uu'a more or less swollen with spines or bristles below, abdo-
men elongated, somewhat llatteiUMl, not contracted in the middle,
'^riiorax wilho\it distinct yellow markings.
j. — Hind femora very much swollen; small cross-vein at right .nnirles
to longitudinal veins Syritta.
SviiiTTA I'li'ii.Ns Unne, ^rcigen Zwrhl. Ins. iii, ^K!. Europe. Com-
mon apparently over all of North America.
jj. — Hind femora never remarkably swolhin, hind coxa' often with a
spinous process, small cross vein of wing always oblinue.. .Xylota.
XviiOT.v oiisciitA Lw., Cent, vi, .'i."). ;Mt. Hood, Oregon ; Wash. Terr.
Calif. ! lied Kiver of the Xorih. Specimens from the former locali'''s
w
1SSJ.J '*-'^ [Willislon.
{liirce so closely with Locw's (Icscription thai I helicvc thciii to he llio
SiUUO.
Xylota K.uNrii.A Say. Compl. AVr. 1, lo ; PI. S, fi.ir. 4. Wash. Terr.,
("alii'. : New Euglaiul. Xumerous specimens from the-e loealilies re-
semble so closely the Eastern ones, that I scarcely doiiht their identity.
The thinl. joint oV the larsi varies from, yellowish to (luite black, ant^he
spine or lub.'rcle of the hind coxa; is ipiitc disiinct ; Ihe antenna' vary
somewhat is color. U X. '/umlri.in'n-uJ>'t:t Lw. really a dislinc species V
Observe the discrepancy between the diagnosis and description as regards
tlu^ male coxa'.
Xvi,oTA nouA CFab.) :S[eigen. Oregon, Wash. Terr., Calif. '. Europe
and North America. Common.
Xvi.oTA, sp. no\. Colorado.
Dillers irom .s'. hirohir Lw. in the presence of long coxal spines; in all
the tarsi cvceot the last two joints, the anterior and middle tibia', and the
posterior libiic at base and tips being yellowish-red.
hh.— Face descendinir more or less below the eyes, often ol)tuseIy tnbercn-
late Thorax either with distinct spots or abdomen banded.
k_The sixth vein bevond the jniiclion of the posterior basal cross-
vein, extends fofwar.ls snbparailel lo the border, the discal cell
rounded on its posterior angle, hind lemora swollen (and wUh a
triangular iirotnberance below on outer part; anterior parr ot
winii's more or less clouded).
l_Secwnd joint of antenna', elongate; anlenna' about as Ion- as
liead . . . '. Mixtemyia.
11 —Second joint of antenna' not elongated, the antenna' shorter than
luad ..'. fipilomyia.
Sl'IT.OMVIA INTKKRII'TA, Sp. noV.
,^^ (J. —Very closely allicnl to X loi}fiiriin<i.% but seems to .show a ciistant
difference in that the first, third an<l fifth cross-bands an' distinctly t!iou.j:li
narrowlv iiiK'rruiile.l. and that the last section of the si.xth longitudinal
vein is distinclly shorter, scarcely more than half as long as the po.-terior
basal cross-vein. The jx.sterior side of the hind femora are iu some speci-
mens ciuite black. Washington Territory.
The generic diflerences between our species of Mixtemyia and Si)ilo-
myia an; very trivial.
kk —The last secli(Mi of the sixth vein short, runniu'-;- directly into the
lionler of the wiuiT. hind femora not swollen, nor with spmes or pro-
jection below. , . . r~ ,
m'_Antenna' in^erh'd high up on a ('(mic;il project am, fron ver>
sliorl face much produced directlv downwards, obtu-ely lubereu-
lale, antenna' shorter or !<uiger than the head Sphecomyia.
SiMiixOMYiA viTT\TA (Wied.) O. S., Wicd. Aus. Zwci., ii, sV, aud in
(PsiintK oriiKf '(.■*). Eastern Stales '. Colorado.
*SiMir.cuMviA r.ni:vuouMs (). S., West. Dipt., :!ll. California.
■Hi
:1
Willistun.l ,*J28
[.May 1)1,
Sphecomvta I'ATToxrt, sp. nov.
(f 9, AntLM.niu nvl.lisl.-Mack, very sliort. joints noarlv oniie same
Icnjirh ; tl.<. first cylindrical, llic srcnd sul.-trian-ular, the iliird ronndcd
redd.sh I,el.,u- ; arista reddish. Face .olden yell(,^v, with a black stri,.e
rcuchin- from the antenme to the oral mar-in, cheeks black • front in
fei^vle black ^vith a -olden spot on each side. Thorax black a hir-o spot
on the pleura' and a smaller one under it, humeri and basal i-art of'lcutc]-
hxm yellow. Abdomen black; first se.-ment with a narrow posterior bor-
der, second se-ment will, two narrow yellow cross-bands; the anterior
one near tlie middle of the se-ment broadly infrrupted, the posterior
mar-mal one entire; third and tourlh se-menls similar, the middle cross-
bands successively a little wi,ler and le.s broa.llv interrupted ; fifth se--
iiicnt nearly all yellow. Femora brownish-black at the base, becomin'^r
mldrsh at the end, especially on the posterior pair. Anterior tibia', exc..p^t
tl.c base and tarsi, <piiie black, middle and posterior tibia' and tarsi e.x-
cei.t the last two joints, reddish-yellow. Win-s tinued with br.,wnish
alon- the veins, hyaline in the middle oflhe cells. Lon-. corp. l:j-14mm
Two .specimens. AVashiniiton Terrilorv.
This species is xnvy like S,,ha:>„!iia brerimn.i, (). S., hut ditlers in the
antenna! bein- still shorter, and the picture of the abdomen diderent.
°'™"~iU,"'h!,'"' ^''"'■•';.^""i^f'''^ "'>^^- <l<>«-'b n^'iu- the middle of head in pro-
gg.-Lar-er pilose species, the ab,lo;n(M;\;iwaVs with VhrntT^TrZ^
Jlm^um ot thorax never wiih yellow «ulrkin-s other than on the
n.-Scu_tellum, mar-in and [tleura of thorax with bristlv hairs- face
disnncily tubcr.-ulate ; feuK.ra slender ; abdomen ■uniforn'i me-'
'""''•' "'" '"'"''^''1 = . .Chrysochlainys.
The following table of the Xorth American si,ecies I reproduce from
Osten Sacken (West. Dipt., :540j, without chan-e :
Arista black
, . , , . rrn'siin.
Arista reddish.
Le- entirely reddisli yellow " 7-.,
Anterior femora at base and lips of all the larsi blackV.V.'wr,'/^'
All the femora brown ; tibia' likewise infuscalcd niuripes.
Cniivsonu.AMYs cuoKsrs (). Sacken. West. Dipt., :U1. Washin-ton
Terr., t'ahfornia I Utah. '"'
nn-— Thorax without any bristly hairs.
o.— Face short, not produ.'ed, exiendin- but verv little below the
eyes, shorter than the front, concave fnnn antenna' to tip,
m.t tubereulate, transversely arched, hind fe,n<.ra more or
less thickened.
p.-Abdomen cK.n-ate, hind femora with short spinous liristles
behnv -1-. 1
BracliypalpuB.
t
is»;'j.]
329
[WilliMoii.
BitACiiYrAUTs iMi.ciiEK "Wlstn. ('.in. Entomoloirist. vol. .\iv, p. 7S.
Oreg'uu, Vasliinirton Terr. Readily reco<nii/c(l by the abdominal segments
lifinir Itroadiy bandrd and bordered behind by iirilliant brassy or bronze,
the fourth seiinicnt in the male -wholly so. Tb.e tirst seument in the
male with a narrow posterior border e.\tendin,n' across I'rom its sid(;
spots.
pp. — .Vbdomen very broad, thora.v densely pilose, very larire sjiecies
Hadromyia Wlstn, I. <;.
IlAnKoMYiA GKAXDia WIstn., 1. c. 'Washinuton Terr. The present
spoeies is llu; hir^'est Syrphid of whieh I have any knowledi:e ; it measures
nearly an ineh in leniith by a third of an inch in width across tin.' alido-
men.
oo. — Face produced, lonu'cr than the front.
q. — Face ju-oduccil foruards, pointed, con eaxc from antenna' totiji, not
tuliereulate, subcarinate, eyes of male coniiiruoiis or nearly so in
fi'ont ot ocellar tidiercle, hind femora thickened, usually with
inistly points below, abdomen without yellow markinus.Crioprora.
A. — Dorsum of thorax beset with thick or yellowish or yellowishrufous
pile, on the pknira black ; win^i's with bi'ownish clouds aloiiii' tin-
veins.
a. — Front in female broad, beset with yellow jiile ^nlnjicv O.S.
h. — -Front in female narrow, iiesetwith bhudc [)\\i\.f(iiii)r<it(i. sji. nov.
H. — Dorsum of thorax beset with louii" ,u;rayish or whitish pile, above on
pleura' yellowisli-white, abdomen dark bluish-mclallic (in the male
with black opaque second sciiinent, and a black opaciue cross-band on
third) > .,
( '■•ci/dtiof/itxtfr Lw.
I have m;vor seen a specimen oi eninioiiin^ti'r ; it is pirobalily distinct
from ryincUd, althnuuii the description api)lii's (piito well to my female
eji<tnelhi. A comparison is needed of s])(;(imens from the Atlantic and
Pacific States in order to make the description of Loew's species Uiorc
complete.
*Ckioi'I{ora AT.orf.x (). S., West Dipt.
ClilOl'UOUA CVAM-.r.LA ( ). S., 1. C, iiiJi).
description, as usual, is (luile accurate
CmOI'UOKA I'lCMOItATA, Sp. IIOV.
(j"9- Everywhere deep shiniuij; black. Front in female narrower
than in ci/nnelhi, with i)lack pile, eyes in male less continuous than in
cyanella ; the face a little less produced and more obtusely pointed. An-
tennae reddish-brown, aiista yellow. Thorax and scutellum with rather
abundant yellow ]iile, biack on the jdcnira'. Abdomen with a brassy re-
flection, black pilose, intcrminuied with lonuer yellow on the sides of the
second s^'^i'ment. Lcu's win dly black pilose, the anterior tiliiie and tarsi witli
ijolden pubescence. Hind femora in the male much thickeiu'tl in the male
and bent Avith a row of short spinous tuliercles t»elow, posterior coxa? obtusely
WW (Poro(ii). California,
('alilornia. Oslen iSacken's
*}•
Willislui).]
m
[Mny
tuliri-ciii;it(', und lilii.i' in lowrr third strDii^ly lioni ; in tViii;il<' the fciiKini
aiut lilii.i' not liciit, liic I'uniicrswnilcn luil the Uilicrcli's iiuli>liii(l. Wiii-s
>\illi liiiiwii clotids aioiii;- tliu vein and ii very dark spot near Uh.! tip of
\iiiary, tiic inner portion ut the cells hyaline. Lon.i;. Corp. 15-10 mm.
an
pp
i>hin
;t(in Ttrritorv,
— Fm<
»t evenly eoncavc, tnlicrcnhile ; hind femora slender.
Fae(! produced downwards and forwanl>, prolioscis Ion;" ; eyes of
male well separated, abdomen uniformly lilaek, short, liroad
Eiirhinamallota i>i^.
liul. Soe. Knt. Fr. Apr. ISS-,;, Xo. (>, ]^. IS, llntc/t/jtu/jia \Villi.-^lon, Can.
Kntomolo-i^t, Vol. .\iv, p. Tii, May, 18S2.
KiKniN\-\rAi. I.OTA i.ri'iNA, AVNin., 1. c. Caiifoniia.
EiitiiiNA.MAi.i.orA MoKii'i:,'* AVlstn., 1. e. Northern and Souther;i Cali-
fornia. T know thi< sjjecics only in the female; sliou'd the males e\es
ho found to lie eontiL:uou> in front of the oeellar tuliercle, I kmiw of no
other character to separate it from Eriv]>li'>rii, j'hilli[)i Ver. Zool. J5ot.
<;cscils;. Wien., L'l, T:;.'), isti."), pi. -Jii, H;;-. :>(!.
qo — Face produced directly downward, more or less arched or tul)ercu-
lati' in the lower i>ari.
1-. — Kves of male separated hy the oeellar tuhercle. Antennal promi-
1, alidomen with :i— I i»airs of larucoxal, o!ili(Hie
decora.
iience verv conica
rr.
^Evi
Tahle ^
a. — Al)di
h.— Thre
c. — Secon
mai'iii
vcUov
Soniul
le ocelli ; ante
Criorrhii
hitu
■lor
leri
-.Srcond se^rm.nt with an intt^rrujiled cross-liaml, third and fourth with
entire cros-. liand, attenuated in the nuddle iieliinil and on the sides. .
scitula, sp. nov.
CnioiiiniiNA ntiMKUAt.is, sp. no\
.— F
;ice vein
)w, shiniii'j,' with a senn-translueencv ; cheeks lilac
front in female on U]iper half, lilack : whitish pollinose on the sides helow
the vertex, frontal triangle in male like the i'-dw ; autciune yellow, some-
what infuscated on the first two joints and on upper |)art of third : thorax
hlaek, with shm't thin yellow pih; : sculellum hlack, the edo-e luteou.s ;
aiulomen
lilaek
w It
h reeumhent, n<>l alumdant yellow i>ile ; second se.i
ment with trian'iular yellow spots, in the female the third and fourth,
ts on the anterior marsiins. liftli mostlv vidlow^
with rectau'iular vellow spo
except a narrow m
edian line and the ti|
1 ; Ic'jcs \ello
w , front and middl
and a rinn' on ili>.tal (lart of ]>ostcrior femora, jjosterior tihi.i' in middle
JSSJ.]
331
Willisloii.
'0
posterior mclalarsi. and three last Joints oT ail tin- tarsi lirown : wjiiiis
hyaline. Lonj,-. cori). 10-11 nun. Two s[ie(iniens. Wasliinirlon Terri
tory.
I siis|iecl tli.it the male may also show in some decree the aliihMnin.il
iM:irKin^s oilier tiian tlie spots on seeond s("j,nient, ami that the coloration
of the IciTs ina\ he \ariahle.
riiioitmriN A S( iTLLA, SI), nov.
r-y I . Face yellow, in profih^ uitli a well marked ohtnse tnhercle ;
cheeks hlaok ; front in female hiack on ujiper three-toiirths, uith liiayish
red (lull and short hlack pile : frontal triaiiiilo in male yellow ; eyes coii-
tiuiious for a lon;rer ilistance than in cmiUs, tlie anteniial proUiherance not
so Lrreat. Antenna' ycdlouish hrow n or hlackish-hrown, the seeond joint
sometimes yellow w ith hlack ahove, third Joint always of a liiiliter color
helow ; thorax hlack, shininL', dorsum w itli hlackish i>ile, yellowish on the
borders ; luimeri yellow with smaller confluent yellow pleural sjiots ;
mesopleuni' 'jjray pilose and pollinoso ; seutellum hlack, the ed'.:(' sometimes
narrowly luteoiis ; ahdomen hlaek ; second seunicnt w ith two larii'e yellow-
spots rather narrowly separated, uitli rounded heads and narrowed
toward the margins ; third seuinent w ith a yellow cross-hand on the
anterior mamin. douhly convex heliind, the greatest convexitv heimj;
toward the middle, Avith sharp median aniiular incision, and attenuated
nearly to a jioint on the sides of the ahdomen ; fourth seu-ment similar in
female, in male wholly hlaek or with trianuular spots on anterior margin
and reddish hehind ; hypoi)yirium red or yellow . Anterior coxa' white
l)ollinose in front, femora hlaek except the extreme tii)s, anterior and
middle tihia' and metatarsi, yellow or reddish yellow ; posterior tihia'
yellow iit the hase and tip ; termiiuil Joints of antericu- and ndddle larsi
hlaek ; posterior tarsi fuseous or hlack ; winils nearly hyaline, rather more
clouded toward the front. Lonii'. eorp. 11-1 15 mm. Kiiiht speeiniens.
Wa.shin,u;ton Teiritory, Orejion.
This species has the face in iirolile similar to that of MiUmi notata
Wied. ("(Jenus novum" O. S. C'atalo::. p. i;!S) as liLiured hy ,Mac-
nuiirt.
XIV.
JJ. — Small cross-vein lieyond the middle of diseal cell, oldique.
an- — -Vntenna' with a sulitermiual iiristle or terminal style.
B. — Third Joint of antenn.-e jiroduced ahove into a lonu' conical proc(!ss,
incliiu'd forward aiul terniinatinjji: in the thickened arista : ahdomen
oval hlack, with three iiiterrupted nu;tallic cross-hands; third lon,i;'i-
tudinal-vein straight Merapioidiis Tdgot.
, 'Mera])ioidus villosus IJiu'ot., Hul. Soc. l"nt. Fr. IS?,), p. (i-t. (ieorgia '
8S. — Antenna' longer than the head, second and third Joints swollen,
tcrmiiin'ing in a short thickened style ; third longitudinid vein
strongly angulated, eijiitling a stum]) of a \'ein into the first posterior
eel 1 Ceria.
I'Koi'. .\mi;k. [Miii.os. soc. x\. 112. 'Iw i'ur>;'n:i) avoist 14, isiS'.'.
'-'''- l.liincli:,
Ttililf of sjH'fips :
a. — AiitciiiKil pnijcitiuir of the IV(nil \cr\ slioil ; (iist Jniiii <>| aniiiiiKi'
ni'iirly as Ioiil; as '.asl two to'icihci' * xi-jnij) m.
— Antciiiial projection iR'.irly a> Inni? as (irsi Joint oC antenna', \\n'
latter scarcely loii'j.er tli;ui the >eeonil joint.
b. — Second, third an! I'oiirlh si.iiinenis ol' alidmnen each '.\ ith Iwd*
yellow spots and posliiior inarLCin * pktuhi.
— Ahdonien without such spots, handed.
c. — Second se,niuent of alidoincn much -horli-r than the third ;
front of fiinalc hlack with yellow spots tihhrccidtK.
— Second se^mi-nl of alidonien nearlj' as lonii' as third ; front
of female yellow h(dow, lilaek ahove fritlois.
Cei!IA 'rKii>i:.Ns I. w., Cent, x, ."iT. Loew's de.scrii)lion .ipplies very
■well to a siniile n>ale ^pei inuii from Southern I'alifc.rnia, except that the
cheeks are wholly lilack, and the hind taisi yellow at the base. Other
Bpeciniens from ^Vashin,irton Territory, however, that, are apparently of
the same spei'ies, have the anterior ami miildle femora hlack, except the
extreme tips, the posterior hlack, except ut the i»use, the tihia' fuscous
near the outer ends, one of the phMiral spots and the su[>ra-alar vittula
entirely wantinj;-. The female differs in tin- front \H''\n<^ l)lack on the upper
two thirds ; the seeoiul and third sejxments of the ahdomen stronijcly
marked with whitish pollen, and the le.i;s almost wholly ycdlow, the
anterior femora being blackish in front, the posterior liglitly fuscous
near the til). \ i\'niii](.' ithbnii'dtn taken with a male at New Ihnen, has
it.s h'gs yellow also with fuscous markings of the femora ; the front ia
Idack wUh four small yellow spots.
,'<[ated Mectiwj, June 10, 1SS.2.
Prcsoitt, 4 iiuMitl)ci-.s.
Pre.sidoiit, INfr. I''rai,i;v, iu the Cli;iii'.
A li.'ttcr ;icce|ilii],u' uiciiihofsliip \v;i.- !'(>ceivt'(l fioiii ('. K.
IJawliiis, dated lioi-kinouiit, Riiinliill, JMiLihiiid, May I'J, 1882.
Mr. ]'. n. Law accepted liis apiiuiiitiiiciit to prepafe an
ol/iluafv notice of the late Mf. Vaux, \)\ letter dated May 2o,
1882.
A reipiest for exchanges (t>) be datc(l luick at h.'a.st to 1875)
\vas receiv(.Ml from tlie Societe Z()()j(>oi(|iio ile Frtince, No. 7'
Rue des Uraiids Aii^unstins, J'ari.s, in a letter dated May 27, and
signed 11. rier.son, Sec. Adjt. On motion the Librarian was
I .