LEPIDOPTERA. 



361 



ally the larvae soon after hatching migrate down the branch 

 towards the trunk of the tree until a fork of considerable 

 size is reached before they begin their tent. This is neces- 

 sary, as the completed tent often measures two feet or more 

 in length. The larvae leave the nest daily in order to feed ; 

 and spin a silken thread wherever they go. The larvae be- 



Fig. 442. — Clisioca}n-pa americann, eggs, lent, larva, cocoons, and adult. 



come full grown early in June ; one of them is represented 

 on a partially-eaten leaf in the figure. When ready to 

 transform they leave the trees and make their cocoons in 

 some sheltered place. These cocoons are quite peculiar in 

 appearance, having a yellowish white powder mixed with 

 the silk. The pupa state lasts about three weeks. 



The easiest way to fight this pest is to destroy the webs 

 containing the larvae as soon as they appear in the spring. 

 This should be done early m the morning, or late m the 



