PLATE XVI. 



Fig. i. Fig. 2. 



THE TRICOPTERA OR CADDIS FLY in its larval and pupal conditions. 



Fig. i. The Larva Phrygena (Sedge Fly), five times natural size. This larva spins 

 a cylindrical tube, and when it reaches maturity closes the end and enters its pupal 

 existence (see page 67). 



Fig. 2. The pupa of the same fly ready to tear open its pupal envelope and to 

 enter its imago or perfected flying existence. 



Copyright. 1 



TO FACE PAGE 67. 



