CHAPTER XVI 
THE LIFE HISTORY OF INSECTS 
One of the most interesting things about insects is their 
life history. Most of them during the period of their exist- 
Common CABBAGE WoRM 
a, Female butterfly; , egg, enlarged, — end view above and side view below; 
c, larva on cabbage leaf; d, suspended chrysalis. 
ence pass through a number of changes that have no parallel 
in the life of higher animals. The appearance and habits 
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