E. F. Staveley, British Insects, a familiar description of the form, structure, habits and transformations of insects, Londres, L. Reeve & Co., 1871, p. 148-149.
This case has little beauty when old and brown, and of this small tailor or tentmaker within seems to be aware. The writer once turned a handful of these creatures, with soddened dingy-brown coats, looking as if made of old tea-leaces, into a glass full of fresh-growing water-plants. It was a most amusing sight to see the eagerness with which the whole party instantly set to work to cut themselves out new coat, which they constructed patch by patch, cutting away a fragment of brown leaf, and sewing on a piece of green leaf alternately, till they all turned out as smart as a party of Robin Hood’s merry men. Their appearance during the process, however, was anything but handsome.
Others make their case of pieces of stick placed either across, sticking out on all sides, or cut into equal lengths, and lying parallel with each other and with the body of the larva, arranged in an exquisite spiral form. Some build up their cases of grains of sand, forming a thin, smooth, shell-like tube, slightly curved and tapering. Others, and these are amongst the most beautiful, cover themselves with small fresh-water shells, and it is really hard to believe that it is unwittingly that they choose the most beautiful forms of theses. These cases are all held together, and generally lined with silken threads spun by the larvae. Some are at liberty in the water, others are attached to plants, and do not move.
A lady has recently made some amusing experiments with the Caddis larvae. Inducing them to leave their cases by tickling the end of the body (where certain hooks enable the insect to retain their hold of the case); she provided them with fragments of glass, gold beads, and other articles, in which the little creatures soon apperared fully clothed, and doubtless rejoicing in their jewelled bravery.