COTTON INSECTS 



395 



363. Stages in the life of the boll-weevil. In the life 

 of the cotton boll-weevil, as in that of most other insects, 

 there are four stages. These are, (1) the egg ; (2) the lar- 

 val, or grub stage, which is the growing period; (3) the 



FIG. 173. PUNCTURED COTTON SQUARE. 

 Showing egg puncture of boll-weevil and "flaring" of bracts. 



pupal, or changing stage, in which this insect is compara- 

 tively inactive and in which no food is taken ; and (4) the 

 adult or mature stage, which, with the boll- weevil, is the 

 period of activity and of egg-laying. 



364. How the injury is done. Injury to the forms, 



