W. Percival Westell, Pond Life, Book IV, Look and Find Out, Londres, MacMillan & Co., pp. 106-107, 1944.

The Caddis Fly is familiar enough to most boy and girls who go pond-dipping, at least the larvae of this water insect are well know, as they are seen crawling about their case, or sticking under water to pieces of dead wood, posts, bridges and other objects.

The clerverly made home which the larvae builds, and in which it remain both as a larva and pupa, resembles a small tube made of dead leaves, pieces of stick, grains of sand, tiny shells, or other things, fastened together with silk. The tube is open front and back, but only the front door is large enough for the larva to poke its head and legs out of, so that it can crawl about and take its house with it wherever it goes.