162 



ARTICULATES: INSECTS. 



EOVE BEETLES. 

 These are long and narrow, with stout 

 jaws, and the hind body much longer 

 than the wing-covers. When they run 

 they raise the hind body and move it in 

 different directions. Tliey are found 

 about decaying substances. The larvje 

 closely resemble the perfect insect. 



Fig. 298.— Bore 

 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. 299. — Horn-Bug. 



They keep in their hiding-places 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, and some kinds thus live in the larva 

 state for six years before they become perfect beetles. 



SCAEAB^IANS. 

 The beetles known as Scarabaeians have the antennae 

 ending in a knob, which is made up of three or more 



