Download or read book Annals of the Entomological Society of America, Vol. 15 (Classic Reprint) written by American Entomological Society and published by Forgotten Books. This book was released on 2017-11-22 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Annals of the Entomological Society of America, Vol. 15 The external genitalia of male insects are so variable in structure even within the limits of a single family, that it is a very difficult matter to trace the homologies of their component parts; and much detailed study of many types from all orders must be done before the subject can be placed upon a isatis factory foundation. The difficulties experienced in the present work in comparing the various types of Orthoptera alone have been such that it was found desirable to give a relatively large amount of time and Space to this order, and as a result the other orders have necessarily been somewhat sacrificed. Some of them, such as the Plecoptera and Dermaptera, have been but superficially treated, owing to lack of material. It is hoped that these neglected groups will receive their due share of attention at another time. 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.