Memoirs of the Queensland Museum, Vol. 4 PDF ePub eBook

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Memoirs of the Queensland Museum, Vol. 4 free pdf Excerpt from Memoirs of the Queensland Museum, Vol. 4 The Family Encyrtidae with Descriptions of New Genera and Species. By A. A. Girault. Introduction. This great group, in the Australian fauna, is very nearly as numerous in species as the Eulophiche. Five distinct subfamilies are recognised the Encyrtinae, the Eupelminse, the Signiphorinag, the Taneostigmina and the Aphelininse. The latter group in recent years has been placed with the Eulophidai, untenably so. From a distance, this is the most unlikable family in the chalcidoid series but close acquaintance reveals so many fascinating qualities that students, after some experience, will no doubt choose it as a favorite. The remarkable diversity in structure, the wonderful color patterns, the unique and odd special structural enormities, the great structural likeness of the members of a genus, the jumping habit, the present uncertainty regarding relationships, the whole diverse and varied panorama is such that the most torpid of interests must finally become conscious of a spell. The family was to me a "black beast." It had been left until last and finally attacked with the determination born of despair. This was due mainly to my inability to place species in their proper genera and I must confess that for the first three months during which species in this group were steadily described hardly one was placed into its proper genus. My interpretation of a genus became gradually clearer as experience increased and Ashmeads (1904)tables of the Encyrtinse, formerly thrown aside as worthless, are now accepted in the main as good. The generic differences are smaller than I had thought. Such characters, however, as pubescence, sculpture and wing pattern must be ignored as regards genera. The genus Eupelmus is large. Ashmeads table of the Eupelminae must be condemned- it is based, in this instance, upon too trifling characters - pubescence on the eyes and the incisions of the caudal margins of the abdominal segments are highly variable characters- some of the language used is misleading- a number of the genera must fall as synonyms. In some of the encyrtine genera, it is extraordinary that two species may occur which are alike in every detail except for some structural characteristic easily overlooked- for example Baoanusia magnidava and B. persimilis- in the latter, the axillae are a little separated while in the former they are joined and with the usual carina between them. The family is open to philosophical treatment of the highest order. Subfamily Eupelmi1Sle. Many of the genera in this group have been founded upon two variable characters and Ashmeads table of genera, as stated before, is very poor. It is surprising that the antenna? have not been used more for principal divisions. Some of the genera, apparently, do not possess these organs for all we know to the contrary. 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.

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Author : R Hamlyn Harris
Publisher : Forgotten Books
Data Published : 27 September 2015
ISBN : 1332303986
EAN : 9781332303984
Format Book : PDF, Epub, DOCx, TXT
Number of Pages : 374 pages
Age + : 15 years
Language : English
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  • Memoirs of the Queensland Museum, Vol. 4 free pdfMemoirs of the Queensland Museum, Vol. 4

    Download ePub Ebooks For Free. Excerpt from Memoirs of the Queensland Museum, Vol. 4 The Family Encyrtidae with Descriptions of New Genera and Species. By A. A. Girault. Introduction. This great group