E. T. CRESSON, JR. 101 



STUDIES IN THE AMERICAN EPHYDRIDAE 

 (DIPTERA) 



BY E. T. CRESSON, JR. 



This general title is selected to cover a series of systematic 

 papers treating of all the North and South American genera and 

 species of the dipterous family Ephydridae known to the author. 

 Each paper of the series will be complete in itself in the form of a 

 revision of one or more genera. At the end of the series a gen- 

 eral summary will be given, comprising notes on the systematical 

 relationships and arrangement, and a table of the known genera 

 occurring in the Americas. 



The material upon which this series of papers is based has 

 been accumulating for more than six years and is no doubt the 

 most extensive collection in this family ever gotten together for 

 study. This is due largely to the generosity of those individuals 

 and institutions who have patiently allowed the author to retain 

 their material for so long a period. For this privilege the author 

 feels deeply appreciative, and trusts this mention will suffice in 

 lieu of individual acknowledgment. Following is a list of in- 

 dividuals and institutions who kindly placed their collections 

 at the author's disposal. The abbreviation in brackets [ ] fol- 

 lowing each, is that used in the list of specimens examined given 

 under each species to indicate the source of such material. The 

 source as given does not in every case indicate ownership, but 

 rather refers to the individual or institution through whom the 

 material was. secured for study. 



Prof. J. M. Aldrich, [Aldrich]; Nathan Banks, [Banks]; Erich 

 Daecke, [Daccke]; H. S. Harbeck, [Harbeck]; C. W. Johnson, 

 [Johnson]; W. L. McAtee, [McAtee]; M. C. Van Duzee, [\'anD]; 

 The American Entomological Society, [A. E. S.]; T)ic American 

 Museum of Natural History, [A. M. N. H.]; The Academy of 

 Natural Sciences of Philadelphia, [A. N. S. P.]; The Boston So- 

 ciety of Natural History, [B. S. N. H.]; University of California, 

 [Cal.]; Cornell University, [C. U.]; The Hungarian National ]\Iu- 

 seum, [H. N. ^I.]; Illinois State Laboratory of Natural History, 



TRANS. AM. ENT. SOC, XLII. 



