158 



AN ECONOMIC ENTOMOLOGY. 



trapped by placing small heaps of cotton-seed in the groves, to 

 attract them where they can be easily destroyed with pure kero- 

 sene. 



Fig. 1 20. 



Fig. T2I. 



Dysdercus siiturcllus. — a, pupa ; b. adult. 



In the family Lygaida we have species that are oblong in 

 shape, rounded behind and flattened above. They have quite 



long beaks, a moderate- 

 sized head, and all of 

 them are vegetable feed- 

 ers. The body is rather 

 hard, and the insects are 

 often brilliantly or gaudily 

 colored, black and red, 

 in the strongest possible 

 contrast, being favorite 

 combinations. Some be- 

 come nearly an inch in 

 length, though most of 

 them are much smaller. 

 The best known of the .species is the "chinch-bug." Blissiis 

 leucoptenis, less than one-fifth of an inch in length, blackish- 



The chinch-bug, Blissus leucopterus ; long and 

 short-winged forms, enlarged. 



