Obscure dark colours

Maria. E. Catlow, Popular British Entomology, Londres, Reeve, Benham, and Reeve, 1848, p. 154.

Phryganea

The insects of this genus are found near water and are called Caddice-Flies or Water-Moths, and the larvae, caddice worms, in which state they reside in the water in cases made of sand, shells, &c. ; the perfect insects are generally of obscure dark colours.