52 SEDGE FLIES TRICHOPTERA. 



invaluable, though these patterns also do well at times 

 other than the close of day. 



The afternoon rise on fine, sleepy, warm afternoons 

 is frequently due to a hatch of caddis Hies, and the 

 plop of a big trout by the edge of the rushes, is fre- 

 quently the death knell of a big caddis fly. 



The larvae of this family are the familiar caddis 

 worms encased in sticks, stones, or leaves cemented 

 together. They are very good scavengers, feeding on 

 animal matter, but do not hesitate to attack fish fry 

 whenever opportunity offers. The dragon fly larvae 

 are their bete noire^ the long spear with which they are 

 armed, proving a capital weapon for poking the caddis 

 worm out of the protecting sheath. 



A good deal has been said about the transportation 

 of natural flies to newly made fisheries. The family 

 which lends itself more than any other to such planting 

 is the one now under discussion we have on various 

 occasions very successfully introduced several species 

 into waters where they did not previously occur, and 

 being very prolific they soon form an important 

 addition to the food supply. 



