76 NEW Yi'KK STATE M I SEU \l 



M-:.MAT(>('i:i:ors DIPTKHA n 



Chironomidae 



i:v OSKAI; AUGUSTUS JOHANNSBN 



The present work forms a coin inn:ii ion of the paper entitled 

 Aquatic Nemaioceroiis Diptera." published in bulletin 68 

 i)i' the NY\v York Siaie Museum ir.iii.'t). In that paper the 

 Blepharoceridae, S i inn 1 i i d a < . r u 1 i c i d a e , and 

 ill.- 1> i \ i d a e were treated, hi this paper (he Chironomi- 

 dae will lie considered, the classification reviewed, the chirono- 

 niid genera of ihe world described and discussed, and finally de- 

 scriptions miveii of Hie imagoes of all km>\\ n North American 



species e\ce|il those bdoiiLMMU lo llie i:roiip ( ' e r a < O J) O g O D 



(sens, hit. I. I )escript ions will also he given of all larvae and 

 pupae as far as known. The luilk of the material studied was 

 collected in New York. Inn many specimens were obtained from 

 the .Mississippi \alle\. Rocky mountain and 1'acilic coast states. 

 In dra\\inti up the descriptions of the species upward of 5000 

 pinned specimens and much alcoholic material was studied. In 

 order to save space the references i,, \\orks of authors are abbre- 

 viated. only the author's name followed by a date is given, the 

 complete reference beini;- -i\en in the bibliography in the back 

 of the book. The study upon this family of Hies was begun 

 in the spring of 1901 and was ion tinned throughout four sea- 

 sons. 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. 1 am also under obligations to Pro- 

 fessor Kello.uii of Leland Stanford jr. university. Professor C. O. 

 Houghton of Delaware agricultural college, Professor Aldrich of 

 Idaho. Mr. A. L. Melamler of Washington State, and Doctors Mac- 

 (lillivray and Riley of the instructino- staff of Cornell university; 

 and especially to Professor .1. ({. Needham of Lake Forest uni- 

 versity for specimens and many favors. 



The family of the Chironomidae or midges comprises 

 a large number of very delicate, and often minute flies, of which 

 over 800 species are known throughout the world. They resemble 

 mosquitoes in some respects, but are usually more delicate, and 



