CIIRYSOMELIN&. 



Subfamily CHRYSOMELINiE. 



Although this subfamily is a very large one, consisting of 

 about 2,500 forms from all parts of the world, we can list only 

 63 species from our region. It may be stated generally that these 

 beetles belong to the temperate and subtropical regions, and are 

 most abundantly represented in America. 



For the purpose of the present work an insect belonging to 

 this subfamily can be recognized in the following way : (1) the 



antenna 



front leg 



tars us 



sutural apical angle 



Fig. 1. — Dorsal view of Chrysolina exanthematica. Wied. 



tarsi are apparently four-segmented, the basal three segments 

 beiug usually densely set with cushion-like pubescence on the 

 underside, the third segment is expanded laterally into lobes 

 which are not separate, but fused together (except in the genera 

 Atjasta, Ghrysomela *, Phaedon and Plagiodera), and the claw 

 arises from the base of the third segment; (2) the antenuae are 

 separated from each other by the breadth of the front of the 

 head ; (3) the anterior coxal cavities are transverse aud oval, 

 not round ; (4) these beetles are all phytophagous ; (5) the larvss 

 are free-living. 



* I. e., Mela&cmia, auctt. ; see pp. 17, G7. 



