Bulletin of the Lloyd Library of Botany, Pharmacy and Materia Medica, Vol. 1: The Biology of North American Caddis Fly Larvae (Classic Reprint) - Tapa blanda

Excerpt from Bulletin of the Lloyd Library of Botany, Pharmacy and Materia Medica, Vol. 1: The Biology of North American Caddis Fly Larvae

A few caddis-worms that construct portable cases use no other material than silk in their structure. By far the greatest number of species, however, use stones or sticks cemented around a more or less heavy lining of silk. The cases, regardless of their external form, are circular in cross-section. Some are of uniform diameter, throughout their length, while others taper, cornucopia-like, from a broad mouth to a very narrow caudal end. In building their. Cases the larvae add new material to the cephalic end. Some species build rapidly and cut about as much from the caudal ends of their dwellings as they add to the front ends. These species make tubes of uniform diameter throughout their length. Other species add to the front ends of their cases as the larvae grow in length and breadth, but never remove material from the caudal ends. The result of this form of construction is a case that is of minute size, but large enough to accommodate a newly hatched larva, at its caudal end, and gradually increases in breadth as the larva grows, thus forming a cornucopia-shaped tube. Figures of both types of cases will be found on following pages.

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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Bulletin of the Lloyd Library of Botany, Pharmacy and Materia Medica, Vol. 1: The Biology of North American Caddis Fly Larvae

About the Publisher

Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.