NEW DIPTERA FROM NORTH AMERICA. 



By D. W. COQUILLETT, 



Custodian, Section of Diptera. 



The present paper is based primarily on a series of specimens col- 

 lected by Mr. II. 8. Barber, who, as assistant to Mr. E. A. Schwarz, 

 accompanied the latter on a collecting trip to portions of New Mexico 

 [rtid Arizona during the past summer. The object of this expedition 

 was to obtain specimens of Coleoptera, and the collecting of the 

 Diptera was therefore a digression from the real o})ject for which the 

 trip was planned. The Diptera thus secured are almost without excep- 

 tion in first-class condition, and form by far the most valuable collec- 

 tion in that order that the United States National Museum has actjuired 

 during the past year. Owing to pressure of other duties oidy a por- 

 tion of the collection has as yet been worked up, but even this portion 

 ha,s yielded many new and interesting forms which it is deemed advis- 

 al)le to make known at as early a day as possible, and they arc there- 

 fore duly characteri>,od in the following pages. 



To the descriptions of these new forms are added those of several 

 others obtained from various correspondents, and for some of which 

 manuscript names have been sent out. Altogether, 4 new genera and 

 94 new species are described in this paper. 



Family TIPULID.E. 



ORIMARGA ARIZONENSIS, new species. 



Body and head black, head and thorax rather densely gray pruiiiose, 

 •ibdomen very thinly grayish pruinose, slightly polished, apex of 

 female ovipositor reddish yellow, her pleura with a whitish vitta on 

 the lower part; male claspers very broad, about one-fourth longer 

 than broad, bluntly rounded at the apex; antennae and mouth parts 

 dark brown, halteres whitish, the base yellow, the knobs pale brown; 

 coxa- dark yellow, remainder of legs pale yellow, apex of femora, both 

 ends of tibiaa, and the tarsi toward the tips, brown; wings hyaline. 



Proceedings U. S. National Museum, Vol. XXV-No. 1280. 



8o 



