INSECTS. 141 



and dark brown or black. The hind wings are 

 of a paler shade, with a broad, blackish outer 

 band enclosing a pale spot toward the apical 

 portion. 



Comstock states that there are five broods of 

 this insect in a season in the South, while in 

 the latitude of Missouri, Southern Illinois and 

 Virginia, Riley thinks there are but three. 



The adult insect deposits its eggs in the tip 

 of the ear, among the silk. After hatching the 

 larvae feed until about one-third grown, when 

 they begin- to tunnel through the kernels under 

 the husks toward the butt of ear. In Tennessee 

 the writer was unable to grow sweet corn suc- 

 cessfully owing to the ravages of this pest. 

 The grown worm is about one and one-fourth 

 inch long, rather robust, tapering toward the 

 head. In color the worms vary from pale 

 green to dark brown. There are several black, 

 shining, elevated tubercles on each segment, 

 each bearing a short brown hair. 



The full-grown larvae make a round hole in 

 the earth, the inside walls of which they 

 cement over. At the bottom of these chambers 

 these larvae change to pupae, where they pass 

 the winter. 



It is recommended to plow in the fall, thus 

 throwing up these chambers and subjecting 

 the pupae to winter exposure and destroying 



