Publisher's Synopsis
Excerpt from Bulletin of the Lloyd Library of Botany, Pharmacy and Materia Medica: Entomological Series, Nos. 1-5; 1921-1926
Whether the caddis-worms construct portable cases, or silken tubes, or make no cases until almost time for pupation, they all secrete a glue, or silk, through Openings in the lower lip, or labium. This silk is produced in large glands within the body cavity. These glands, like the silk-secreting glands of caterpillars, are modifications of the salivary glands, to meet the larvae's needs for silk. The silk is emitted as a liquid, but has the remarkable char acter of hardening immediately after expulsion from the larvae's bodies and of adhering fast to submerged objects, though they be wet and saturated with water. The silk is not usually spun in fine strands, as is that of the Lepidoptera, but is more glue-like, form ing a homogeneous sheet over the object cemented. 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.
