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SCHOOL ENTOMOLOGY 



days. They are light yellowish, and prettily corrugated= 

 The caterpillars of the first generation often attack corn 

 when it is about knee-high, feeding in the axils of the tender 

 leaves so that when they unroll they bear rows of holes. 



FIG. 178. The corn ear-worm (Heliothis obsoleta Fab). 



a, eggs on corn-silk; b, the first three larval stages; c, pupa from below; d, 

 same from above; e, adult moth all enlarged; b, about twice natural size. 



The caterpillars are also quite variable in color, ranging from 

 a light green, through rose color and brown to almost black, 

 and being either striped, spotted or perfectly plain. They 

 become grown in about two and a half weeks and are then 

 from IT to l-o inches long. The grown caterpillar burrows into 



