DESCRIPTIONS OF NEOTROPICAL TWO-WINGED FLIES 

 OF THE FAMILY DROSOPHILIDAE. 



By J. R. JVIalloch, 

 Of the Biological Survey, United States Department of Agriculture. 



In this paper are presented descriptions of a number of new 

 species and notes on one or two previously described species of 

 Drosophilidae represented in the collection of the United States Na- 

 tional Museum. 



The species of Stegana, except two, were briefly diagnosed in a 

 synoptic key printed in the Entomological News ^ and the present de- 

 scriptions are given to furnish details not included in that paper, 

 as well as to place upon record the type-numbers and other data 

 not included therein. 



The types collected by Borgmeier, Wetmore, and Holt are de- 

 posited in the National Museum with the others, those of the first 

 collector being sent to the author by the collector, of the second 

 being found in the collection of the Biological Survey, and of the 

 third from W. L. McAtee. 



STEGANA NIGRITA Malloch. 



Male and female. — Brownish black, shining. Antennae, and some- 

 times the humeral angles, part of scutellum, sides of abdomen at 

 base, and upper margin and middle of pleura paler brown, the pleura 

 never whitish yellow in center and the upper and lower vittae never 

 conspicuously darker than the other parts of pleura. Legs pitchy 

 black, usually with apices of tibiae and all of tarsi whitish yellow, 

 sometimes the tibiae but little darkened. Wings brown, paler along 

 hind margin. Halteres brown. 



Frons at anterior margin not over one-half as wide as its length, 

 and about three-fourths as wide as at vertex; eyes about one-fourth 

 higher than long; cheek linear; face not carinate above; antennae 

 extending to mouth ; palpi broad. Scutellum slightly pointed, apical 

 bristles about three-fourths as long as basal pair. Inner cross-vein 

 at middle of discal cell; marginal cell obtuse at apex; fourth vein 



lEnt. News, pp. 96-100, 1924. 



No. 2540.— Proceedings U. S. National Museum, Vol. 66, Art. 3. 



94117—24 1 



