LIBRARY OF THE UNIVERSITY OF CALIFORNIA. GIFT OF &',M Received cj- . , 1900 Accession No. /2 $ . Class No. - *i LABORATORY MANUAL FOR THE COURSE IN ELEMENTARY AND ECONOMIC ENTOMOLOGY AT THE UNIVERSITY OF CALIFORNIA C. W. WOODWORTH Published by the Author BERKELEY, CAL. 1893 Copyrighted. T FIRST WEEK. Vo*, NEEDED.* A number of grasshoppers. FIRST HOUR. Draw one of the legs, naming the parts as follows: Coxa, trochanter, femur, tibia, tarsus (three-jointed). Describe the nature of the union between each of these parts. Compare each of these parts in the three pairs of legs, and note particularly: (a) Strength- ening ridges, () modifications of the surface for the attachment of muscles, (c) guidepieces at the joints, (d) position and use of spines, (