COTTOy 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 insect.s, 

 there are four stages. These are, fl ) the egg : (2) the lar- 

 val, or grub stage, which is the gro^nng period ; (3j the 



Fig. 17.3. — Punctured Cotton Squ.^re. 

 Showing egg puncture of boll-wee-\dl and " flaring " of liraets. 



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 acti\'ity and of egg-laying. 



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



