A kind of tube

Simeon Shaw, Nature displayed in the heavens, and on the earth, according to the latest Observations and Discoveries, Dublin, G. & W.B. Whitaker, 1823.


The insect, before it becomes an inhabitant of the air, lives under water, lodged in  a kind of tube, whose inward texture is silk; outwardly covered with sand, straws, bits of wood, shells, &. When the hexapod worm is about to become a chrysalis, he stops up the opening of his tube with loose threads, which admit the water but prevent the approach of varacious insects.