54 SEDGE FLIES— TRICHOPTERA. 



is frequently due to a hatch of Caddis-flies, and the plop 

 of a big trout by the edge of the rushes, is frequently 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. 



