Diptera Danica Asilidae Bombyliidae Therevidae Scenopinidae 1908

Author : William Lundbeck
Publisher : Forgotten Books
ISBN 13 : 9780260878168
Total Pages : 170 pages
Book Rating : 4.8/5 (781 download)

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Download or read book Diptera Danica, Vol. 2 written by William Lundbeck and published by Forgotten Books. This book was released on 2017-11-12 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Diptera Danica, Vol. 2: Genera and Species of Flies Hitherto Found in Denmark; Asilidae, Bombyliidae, Therevidae, Scenopinidae The larvae are elongated, cylindrical, finely striated longitudinally. The body consists of thirteen segments including the head and when the segment-like part in front of the last segment is counted. The abdominal segments have sometimes transverse swellings, especially below, or they have warts. The head is small, retractile, and brown, chitinised. There are some bristles on the head and the last segment. The mouth parts consist of a median, hook-formed labrum, knife shaped mandibles and large and broad maxillae With a generally two-jointed palpus. The mandibles and maxillae are movable up and down. There are small antennal papillae but no eyes. The larva is amphipneustic with spiracles on prothorax and on the penultimate segment (or segment-like part); the spiracles are small. The pupa is free; on the front side of the head across the lower part of the eyes lie the antennal sheaths, directed to each side; they have a strong spine at the base and are compressed With some strong downwards inclined spines. At the bases of the sheaths of Wings and legs there are generally small spines. The abdominal segments have each a girdle of spines above and a girdle of bristles below; at the apex of the body there are some spines. 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.