160 



PESTS OF GARDEN AND FIELD CROPS 



The larvsB of this species feed 

 on the leaves. They are one 

 fourth inch long when mature, 



Fig. 168. — Work of the Spinach 

 Flea-beetle. Original. 



Fig. 169. — The Spinach Flea-beetle. 

 Enlarged and natural size. Original. 



rather thick bodied, grayish in 

 color or sometimes dark purplish. 

 On each segment are rows of 

 raised tubercles. There are two 

 broods in the course of the summer, the adults hibernating. The 

 use of Paris green to poison the larvae and adults, and the destruc- 

 tion of weeds in the fall and 

 spring, are the remedies. 



The Triangular Flea-beetle 

 {Disonycha triangularis Say) 

 is about the same size as the 

 preceding, and has the same 

 feeding habits. Its thorax is 

 marked with three black dots 

 arranged in the form of a tri- 

 angle. 



The life history is similar 



Fig. 170. — The Triangular Flea-beetle. 

 Enlarged and natural size. Original. 



to that of the preceding, and the same remedies will apply. 



