Elva Crary Lottie, A text book of field zoology insects and their near relatives and birds , Philadelphie, P. Blakiston, 1911, p. 45.

The Trichoptera have hairy wings, four of them, and they use them only in the adult stage. They are called caddice or caddis flies. The larvae or caddis worms, are highly prized as bait by old fishermen in England. These queer larvae make a case of sticks, sand or straw about themselves then stick out the head and the thorax, and go crawling about in the water for for food. The adults look considerably like small moths.