Charles Knight, Museum of Animated Nature, vol. II, Birds, Reptiles, Mollusca, Insects, Londres, G. Cox, 1845, p. 367.
The larvae of the Phryganea, a group allied to the Ephemerae, and also often called May-flies, live in the water, and make for themselves curious habitation, which, snail-like, they drag about with them as they crawlalong the sandly bottom of rivers ans streams. The fisherman know them by the name of Caddis-worms, as he knows those of the ephemera by the name of Bank-bait.
These Caddis-worms, the larvae of different species of Phryganea, construct their tenements respectively of various materials : some glue bits of sticks together, and thus make a rough case ; some use portions of reed ; some fragments of rushes, and form a fluted cylinder : some roll portions of leaves spirally around them, some avail themselves of fine particles of sand, and form a very neat and compact cylinder ; others agglutinate together small river-shells, minute pebbles, bits of stick, and other materials, making a rough domicile, lined, however, with soft silk.