COLEOPTERA. 



579 



and later gnawing holes into the leaves (Figs. 705 and 



706). In May and June the 

 brown, sluggish larvae may 

 also be found feeding upon 

 the upper surface of the 

 leaves. The full-grown larva 

 is chestnut -brown, marked 

 with black spots. The beetles 

 can be destroyed in early 

 spring by jarring them from 

 the vines onto a sheet wet 

 with kerosene ; use for this 

 purpose a piece of sheeting 

 several yards long, with a 

 stick fastened to each end so that it 

 can be easily moved from vine to 

 vine. 



The Wedge-shaped Leaf -beetles. — 

 These insects are characterized by the 

 peculiar form of the body, which is 

 narrow in front and broad behind. In 



Fig. 705. Fig. 706. 



most of the species the body is much roughened by deep pits ; 

 and usually the pits on the wing covers are in regular rows. 

 These insects and the tortoise-beetles differ from other leaf- 

 beetles in having the fore part of the head prominent, so that 

 the mouth is confined to the under surface. Some of the larvae 



