114 



GENERAL ZOOLOGY 



branous hind wings. Their mouth parts are fitted for 

 biting, and metamorphosis is complete. There are eight 

 suborders : 



Suborder 1. Adephaga. The beetles in this group are 

 all carnivorous. Two important families live on land and 

 the other two are aquatic. The tiger-beetles (Cincindelidce) 

 are bright-colored active creatures which seek their prey 



"'- 



& -^ - 



FIG. 56. Coleoptera. June-beetles, their grub and pupa; potato-beetle; 

 lady-bird; rove -beetle; tumble "bug"; plant slugs; click-beetle; predaceous 

 ground-beetles; snout-beetles; weevils. 



in open places, such as roadways and sandy beaches. 

 The predaceous ground-beetles (Carabidce) are usually 

 black or brown. They search the surface of the soil for 

 caterpillars and other small insects which they attack with 

 great vigor. The predaceous diving-beetles (Dytiscidce) 

 are found among aquatic vegetation where they catch 

 various small animals. The whirligig-beetles (Gyrinidce) 

 make curious gyrating movements on the surface of the 



