Elementary entomology ((c1912)) (21193992616)

Title: Elementary entomology
Identifier: elementaryentomo00sand (find matches)
Year: (c1912) ((c10s)
Authors: Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882
Subjects: Insects
Publisher: Boston, New York (etc. ) Ginn and Company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library



Text Appearing Before Image:
64 ELEMENTARY ENTOMOLOGY
Text Appearing After Image:
FIG. 83. The spiny elm caterpillar, or mourning cloak butterfly. (Slightly reduced) Partly grown caterpillars, chrysalis, empty chrysalis, and adults. (After Britton) wherever it goes, so that the many threads soon make a fine silken car- pet, which serves as a foothold. At the end of a week they molt; the skin of each caterpillar splits down the back, and it crawls out with a new and« larger skin, which has been forming beneath the old one. The caterpil- lars remain quiet during molting, but they soon be- come active again and feed with in- creased voracity. Every week for the next three weeks this molting proc- ess is repeated, the cast skins decorating the de- foliated twigs, as shown in Fig. 84. As they grow, the caterpillars scatter over the neighbor- ing leaves, but still remain in colonies. Their appetites seem to increase as they grow, and