176 ARTllRol'dUS ; INSECTS. 



Rove Beetles. 



These are long and narrow, with stout 

 jaws, and the hind bod}- much longer 

 than the \\'ing-covers. When they run 

 they raise the hind body and move it in 

 different directions. They are found 

 about decaying substances. The larvae 

 closely resemble the perfect insect. 



Fig. 298. — Rove 

 Beetle. 



Horn Bugs. 



Horn Bugs are Beetles which have the body very 

 hard and oblong, the thorax and head very large, and 

 the upper jaws large and often curved and branched. 



Fig. 2gg. — Horn Bug. 



They keep in hiding in the daytime, and fly about at 

 night. In the adult state they eat the leaves of trees; 

 but the grubs live in the trunks and roots of trees, 

 sometimes for six years before they become Beetles. 



Scarabaeidse 



The Beetles known as Scarabaeida: have the antennae 

 ending in a knob made up of three or more leaf- 



