Overview

Excerpt from Insect Fauna of the Rhode Island Coal Field Known only by its wings, which differ considerably in form, the fore wing being slender, nearly or quite three times as long as broad, the apex produced and roundly pointed, the coetal margin gently and rather regularly arcuate, the lower margin more strongly and regularly but not greatly arcuate; the hind wing is much broader and less pro duced, not much more than twice as long as broad, the apex hardly in the least produced and broadly rounded, the costal margin strongly arcuate apically, but very gently before that, the lower margin regu larly and strongly arcuate throughout. The neuration is essentially similar in the two wings, though varying a little. The mediastinal and scapular veins are both simple, the former running to beyond the mid dle of the wing and terminating in the margin, the latter to the apex, and both close together and to the margin throughout their course. The externomedian is the principal vein, occupying withits branches the apical half of the lower margin; a principal superior branch is thrown off well before the middle of the wing, and runs subparallel to but distant from the scapular vein and so has an arcuate course; from it fall two or three inferior distant branches (two in the fore wing, three in the hind) which run parallel to the main stem. The interno median and anal veins are simple straight divergent veins, which have an apical arcuate or declivent fork, connected at base by straight cross veins with the veins on either Side, forming large apical cells much after the manner of Rhaphidia, the further general resemblance to which is heightened by a more or less distinctly and distantly scalari form series of submarginal distant cross veins; other cross veins, straight or faintly sinuous, sometimes transverse, sometimes consider ably Oblique, are scattered distantly over the wings, giving them a very widely open reticulation of polygonal, triangular, or rhomboidal cells. 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.

Full Product Details

9781333994952

Table of Contents

Reviews

Author Information

Tab Content 6

Customer Reviews

Recent Reviews

Countries Available