PLATE VII, 



FIG. 2. Caddis Fly. Larva in Sac. 

 Natural Size. 



FIG. i. The Tricoptera Phryganea (Sedge- 

 Fly), three times natural size. This larva spins 

 a cylindrical tube, and when it reaches maturity 

 closes the end and enters its pupal existence. 



FIG. 4. The Flying Form, Magnified 



FIG. 3. The Pupa, three times natural size, 

 ready to tear open its pupal envelope and to enter 

 its imago or perfected flying existence. 



THE TRICOPTERA, OR CADDIS FLY. 



