. Elementary lessons on insects . Fig. 29.—The net-making caddis fly Hydropsyche. At the left below is a larva in its shelter, its head behind its catching net. At the right is a pupa that has left its pupal chamber under the barricade of stones below, and is swimming to the surface to transform. Above is the adult caddisfly. The line at the right shows actual length.

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Keywords: ., bookcentury1900, bookcollecti, bookdecade1920, booksubjectinsects