FAMILY LEPTOCERID^ 



These are caddis flies with very long antennae, and usually 

 with very hairy wings. It is a large family and widely distributed. 

 About forty species are known from North America, where the 

 genus Setodes is best represented. Some of the caddis flies are 

 very handsome, and also resemble tineid moths, especially the 

 little flies of the genus Adela and its allies. Setodes exqiiisita 

 Wali<er well deserves its specific name. The larvae are found 

 both in ponds and in running streams, but more commonly in the 

 latter. They are not often found in very swiftly running tor- 

 rents, since their food is largely living vegetation, which does not 

 grow in such streams. The case is free, and is ordinarily com- 

 posed of sand, nearly cylindrical, but slightly curved, although 

 there are some cases of different shaoe. 



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