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ORDER TRICHCOPTERA. 



(Caddis-Flies.) 



The adult caddis-fly resembles a small moth, but 

 it has wings with hairs instead of scales. The 

 wings meet at an angle over the back, resembling 

 a little roof. 



The eggs are deposited usually in jelly-like masses 

 on the surface of ponds. Last summer we noticed 

 scores of globular masses of eggs floating about 

 on the surface of the w^ater for a few weeks. They 

 gradually disappeared in the water, or fell into the 

 hands of enemies. 



The larva (Plate 13, Fig. 8) is somewhat like a 

 caterpillar. It builds a permanent home for itself 

 of sand grains, tiny pieces of stick, etc., cementing 

 the particles together with material from its own 

 body. In this tiny house, which as a rule, is not 

 more than an inch long, it lives and drags it along 

 with it as it moves about in the water. When mov- 

 ing in the water the head and 3 pairs of legs are 

 extruded, the rest of the body being in the case. 



The Genus Hclicopsyche builds a little home in 

 the form of a tiny snail shell, and as it moves about 

 it carries it on the end of its body. The shell-like 

 portable house is made of tiny pieces of sand 

 cemented together. (Plate 13, Fig. 11.) 



Another Genus Hydropsyche, whose larv?e are 



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