BRANCH ARTHROPODA; CLASS IN SECT A : THE INSECTS 209 



The pupae are quiescent and are mummy-like in appear- 

 ance, the legs and wings being folded and pressed to the 

 ventral surface of the body. Among the familiar beetles 

 are the lady-birds, which are beneficial insects feeding on 

 plant-lice and other noxious forms ; the beautifully colored 



FIG. 72. A. family of forest tent-caterpillars (Clisiocampa disstria , resting 

 during the day on the bark, about one-third natural size. (Photograph 

 from life by M. V. Slingerland.) 



tiger-beetles, predaceous in habit; the "tumblebugs " and 

 carrion beetles, which feed on decaying organic matter; 

 the luminous fire-flies with their phosphorescent organs 

 on the ventral part of the abdomen; the striped Colorado 

 potato-beetle and the cucumber-beetles and numerous 

 other destructive leaf-eating kinds; the various weevils 



