TBICHOPTERA. 149 



and other articles, in which the little creatures soon 

 appeared fully clothed, and doubtless rejoicing in their 

 jewelled bravery. 



When about to change into the pupa, the larva sews up 

 the mouth of the case and undergoes the change within 

 it The pupa, when ready to emerge, acquires so much 

 activity as to gnaw its way out, and rising to the 

 surface it floats to some reed or blade of grass, which it 

 then ascends, and undergoes its final change. The larvae 

 feed on other living insects and on vegetable matter. 



The female has been seen to go a considerable depth 

 under water to deposit her eggs. 



There are about two hundred species known in 

 England. 



The following table is taken from Westwood's 

 classification. 



