William Houghton, Sketches of British Insects: a Handbook for Beginners in the Study of Entomology, Londres, Groombridege, 1888, p. 66.

These insects are all aquatic, the larva forming for themselves litle homes of dead sticks, stones, bits of grass, shells, grains of sand, etc., in which they dwell. Some are active, and carry their houses about with them ; others attach them firmly to stones and other submerged bodies.