Classification Of The Ichneumon Flies Or The Superfamily Ichneumonoidea PDF Download

Excerpt from Type Species of the Genera of Ichneumon Flies In working since 1902 on the classification of the Ichneumonoidea, a complex with some species distributed among over genera, it soon became evident to the writer that in order to do the most satisfactory work one of the first steps was to being up to date and keep up to date Dalla Torre's admirable catalogue. So far as the North American forms were concerned, this had been done prior to 1909, when the writer joined the Bureau of Entomology, United State Department of Agriculture. During the following four years, while in the Bureau of Entomology, the writer extended the work of cataloguing so as to include the whole world. This led up to the consideration of all known genera, and finally to the adjustment of their names by means of ascertaining the legal type of each genus, where the type had been already selected, and the designation of a type in all other cases. The necessity for such a procedure must be patent to all true friends of science, when it is remembered that. One of the chief ends of scientific nomenclature is stability and that this end can be best approximated, where generic names are at issue, by arguing the case of each name from the standpoint of the definite premise - the type of the genus - just as in the case of the species the type of each species is the final court of appeals. 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.