218 



INSECTS AFFECTING THE INDIAN CORN. 



INJURING THE EARS. 



The Corn- worm or Boll- worm. 



Heliothis armigera. 



In the Southern States this insect is called the 

 Boll-worm because it feeds upon cotton bolls ; but at 

 the North it is known as the Corn-worm from its 

 habit of eating the kernels of ripening corn. On this 

 account it has come to be recognized as one of the 



Fig. 116. corn-worm : a, b, eggs, side view and top view, magni- 

 " tied: c, larva; d, pupa, in cocoon: e, moth with wings ex- 

 panded : f, moth with wings closed. 



most vexatious insect enemies of this crop, and 

 no thoroughgoing remedy that is practicable on 

 a large scale has as vet been devised for it. The 



