NEW DIPTERA, OR TWO-WINGED FLIES, FROM AMER- 

 ICA, ASIA, AND JAVA, WITH ADDITIONAL NOTES 



By J. M. Aldricii 



Associate Curator, Division of Injects, United States National Museu?n 



This paper contains descriptions of 4 new genera, 13 new species, 

 and 1 new variety of Diptera, together witli some miscellaneous 

 notes. It constitutes a report, which for various reasons it seems 

 desirable to publish, on an accumulation of specimens collected from 

 many parts of the world. All the species are represented in the 

 United States National Museum collections by type or paratype 

 specimens. 



Family CYRTIDAE 



Genus OCNAEA Erichson 



Eriosoma Macquakt (preoccupied), Dipteres exotiques, vol. 1, pt. 2, p. 288 



(Sep. p. 172), 1839. 

 Ocnaea Erichson, Eutomographieu, vol. 1, p. 155, 1840. — Cole, Traus. Amer. 



Ent. Soc, vol. 45, p. 23, 1919. 

 Exetasis Walker, lusecta Saundersiana, p. 203, 1S52. 



Two species were originally included in Ocnaea^ both new, micans 

 from Mexico and longlcornis from Brazil; the second was figured. 

 Coquillett ^ designated Ocnaea tnicans as the type species. Mac- 

 quart designated Acrocera calida Wiedemann as type of his Erio- 

 soma. Exetasis contained originally but one species, tumens, new, 

 which is therefore the type ; Loew - placed the genus as a synonym 

 of Ocnaea. 



The genus has very striking characters. The proboscis is very 

 short; the densely hairy eyes are contiguous from the mouth almost 

 to the vertex ; there is a short frontal triangle bearing the antennae ; 

 the anterior ocellus is absent; the antennae have a greatly elon- 

 gated third antennal joint, curving downward, not bearing a style 

 or arista. The venation is complete and in general not unlike that 

 of Tdbanus^ except in a few variable details and in the regular oc- 

 currence of a cross vein in the first posterior cell at or beyond the 



iProc. U. S. Nat. Mus., vol. 37, p. 577, 1010. 

 " Wiener Ent. Monatsschr., a'oI. 1, p. 34, 1856. 



No. 2932.— Proceedings U. S. National Museum, Vol. 81, Art. 9. 



110571—32 1 1 



