A Catalogue of North American Diptera (or Two-Winged Flies) (Classic Reprint)

Download or read book A Catalogue of North American Diptera (or Two-Winged Flies) (Classic Reprint) written by J. M. Aldrich and published by . This book was released on 2016-06-27 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Catalogue of North American Diptera (or Two-Winged Flies) The present work is based upon Osten Sacken's Catalogue of North America Diptera, second edition, published in All the references of that work are embodied in this, with only such changes as later studies seem to require. Still, the great amount of work which has been done on North American Diptera within the quarter of a century has largely changed the face of the subject. Hence the reader will probably observe, especially at first, more of contrast than resemblance. The number of species has doubled; the number of references to previously known species has almost doubled; several families have been monographed or revised, with more or less change of nomenclature; along with this has gone the publication of a multitude of smaller papers, touching every family but one, and the larger part of the genera. Under these conditions it is inevitable that great changes should appear in the new catalogue. It is the more necessary that I should acknowledge my obligation, which is far greater than appears on the surface. Fauna! Limits - These, as in the former catalogue, include all of North America, in the widest sense, taking in Panama on the South and Greenland and the Aleutian Islands on the North. The West Indies are included, even down to Trinidad, adjoining Venezuela. There is no place to draw a line between the islands. The Bermudas and the Hawaiian Islands are not included. 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.