Excerpt from The Monthly Bulletin; California State Department of Agriculture, Vol. 9: Special Pest Control Issue; August, 1920 The adult parasites escape from circular exit holes cut through the dorsal region of the shell. Cutting the shell of the older scales is a Slow and laborious process. The parasites effect a small hole through the shell by biting out tiny pieces with their sharp-pointed mandibles. After a hole is cut, it is slowly enlarged by cutting around the edges. When the exits are large enough to permit escape the parasites force themselves out of the old shells. 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.