COLEOPTERA 



121 



parently four-jointed, the third joint 

 being bilobed and the fourth joint 

 almost concealed at the base of the 

 lobes, and the fifth joint, which is 

 longer, appearing to be the fourth. 

 This character will not often be 

 needed to identify members of this 

 family. The larvae bore in the solid 

 wood of many trees and are often 

 destructive. The Round-headed Apple- 

 tree Borer and the Locust-borer belong 

 here. (See page 292, Part II, and Fig. 

 211, page 293.) 



75. Chrysomelidae. The Leaf -beetles, 

 as these insects are called, include 

 many species, among which are a 

 great number of the most destructive 

 insects. They are small, usually 

 rounded beetles. Some of them may 

 be mistaken for lady-bugs, but the tarsi 

 will distinguish them, as the tarsi in 

 this family are the same as in the 

 one preceding. The larvae vary greatly 

 in form. Some feed on the foliage 

 of plants with the adults, others live 

 in the soil and attack roots. The 

 Colorado Potato-beetle is the best known 

 and one of the largest of the Chry- 

 somelids. (See page 276, Part II.) 

 Many leaf-beetles have the hind legs 

 strongly developed and are able to 

 leap actively. These are the Flea- 

 beetles. Different flea-beetles attack 



FIG. 87. Types of 

 Beetles. Long-horned 

 Wood-borers (Ceram- 

 bycidce). 



