GRAIN CROPS 



INSECT ENEMIES 



The Chinch Bug has long- been recognized as 

 one of the arch-enemies of American agriculture. The 

 adult (h) is a small blackish insect, slightly less than 



Chinch Bug 



a, ($, eggs; c, e,/, youag; nymph or pupa; h, adult. Magnified 

 (After Riley) 



1-5 inch long, with the legs dark yellow, and their 

 tips black. The females deposit eggs about the roots 

 of grass and grain. From these hatch young bugs 

 (c) that do not differ in general form from the adults. 

 They suck the sap from various plants of the grass 

 family, gradually increasing in size, and moulting at 

 intervals. In a few weeks they become nearly full- 

 grown, but instead of changing to a quiet chrysalis 

 state, they simply moult again and continue feeding 

 as before. In these early stages, which correspond to 



