Aquatic Nematocerous Diptera, II; Chironomidae ...

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: AQUATIC NEMATOCEROUS DIPTERA II Chironomidae BY OSKAR AUGUSTUS JOHANNSBN The present work forms a continuation of the paper entitled Aquatic Nematocerous Diptera, published in bulletin 68 of the New York State Museum (1908). In that paper the Blepharoceridae, Simuliidae, Culicidae, and the D i x i d a e were treated. In this paper the Chironomidae will be considered, the classification reviewed, the chirono- mid genera of the world described and discussed, and finally descriptions given of the imagoes of all known North American species except those belonging to the group Ceratopogon (sens. lat.). Descriptions will also be given of all larvae and pupae as far as known. The bulk of the material studied was collected in New York, but many specimens were obtained from the Mississippi valley, Rocky mountain and Pacific coast states. In drawing up the descriptions of the species upward of 5000 pinned specimens and much alcoholic material was studied. In order to save space the references to works of authors are abbreviated, only the author's name followed by a date is given, the complete reference being given in the bibliography in the back of the book. The study upon this family of flies was begun in the spring of 1901 and was continued throughout four seasons. The work was done in the entomological laboratory of Cornell university under the direction of Professor J. H. Corn- stock, to whom I wish to express my thanks for advice in the preparation of this work. I am also under obligations to Professor Kellogg of Leland Stanford jr. university, Professor C. O. Houghton of Delaware agricultural college, Professor Aldrich of Idaho, Mr. A. L. Melander of Washington State, and Doctors Mac- Gillivray and Riley of the instructing staff of Cornell university; and especially to Prof...