Samuel Orchart Beeton, Beeton’s Dictionary of Natural History: A Compendious cyclopaedia of the animal kingdom, Londres, Ward, Lock & Co., 1871.

The common name of the species of Phryganea which reside in the water in cases, which they form of various substances, such as bits of stick, grains of seed, small stones, etc, held together by a silken thread, secreted in their bodies in the same manner as in the silkworm.