2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



The types of very nearly all the species described b}" Coquillett 

 and Townsend, most of which are deposited in the United States 

 National Museum, have been examined. Prof. S. J. Hunter of the 

 University of Kansas very kindly loaned Townsend's types deposited 

 there, for examination. A study of these revealed that three of the 

 types, long submerged in synonomy, undoubtedly represent distinct 

 species, but in most the synonomy of Coquillett and of Aldrichwas 

 confirmed. Van der Wulp's types of Mexican and Central American 

 species which arc located in the British Museum, were not seen, but 

 correspondence with the museum cleared up some of the uncertainty 

 surrounding these species. It is to be regreted that the position of 

 Miltogramma erytlirura and M. nana of Van der Wulp could not be 

 unquestionably settled at this time. The types of species described 

 by Meigen, Rossi, Fallen, and Zetterstedt were not seen, and their 

 present location is not known to me, but most represent well known 

 European species, of which I have seen determined specimens from 

 several European workers, and about the identity of which there can 

 be little doubt. Macquart's types of the North American Meiopia 

 lateralis and Senotainia rubriventris were not seen and their present 

 location is not Ivnown. However, very fortunately, both maj' be 

 quite certainly distinguished from the other known species b}" the 

 original description. 



In the course of the work on this group, considerable scattered 

 information has been secured on the morphology of the immature 

 stages, which has been submitted for the purpose of clearing away 

 some of the uncertainty regarding the taxonomic position of the 

 Miltogramminae. Notes on the biology of certain species have also 

 been included. 



To Dr. J. M. Aldrich, I am most deeply indebted for so freely 

 placing the facilities of the United States National Museum at my 

 disposal, and for frequent consultations and much correspondence, 

 at the cost of much inconvenience and loss of time to himself. To 

 Prof. vS. J. Hunter, I am also very deeply indebted for the loan of 

 type material from the University of Kansas Museum, the examina- 

 tion of which has contributed materially to the accuracy of this 

 paper. I am indebted to C. W. Johnson for the opportunity to 

 examine his fine collection, and that of the Boston Natural History 

 Society, as well as for much helpful correspondence on the group; 

 to Prof. M. Bezzi of Italy, who loaned for study specimens of several 

 European genera of Miltogramminae not known in the North 

 American fauna; to Doctor Zerny, who loaned for study North 

 American material deposited in the Imperial Museum at Vienna, 

 which included the type of Arrenopus americanus; to Maj. E. E. 

 Austen and his assistants in the British Museum for helpful cor- 

 respondence concerning Van der Wulp's types; to Prof. R. W' 



