The moth-flies or case worms (Phryganea rhombica)

1639. The moth-flies or case worms (fig. 283. c, Phryganea rhombica) are to be noticed as beneficial insects, on account of the food which they afford in the larvﾵ state to fishes. Residing in the water, and being of a tender texture, they form moveable cases of bits of sand, sticks, &c., in which they reside. On account of their peculiar characters they have been separated from the other Neuroptera by many entomologists, and formed into a separate order called Trichoptera.

Social Bookmarks