360 ERNEST A. BACK. 



Pleura almost wholly black, lightly golden pruinose. The last three 

 or four abdominal segments, the anterior angles (and sometimes the 

 anterior margins) and the venter black. Legs reddish, femora above 

 with black stripes. Wings subhyaline, tinged with a brownish-yellow 

 color, toward the apex and posterior margin darker ; the fourth pos- 

 terior cell closed on the very margin itself, the third less broad than 

 in related species. (Abdomen very stout.) 



Type. — M. C. Z. Two female specimens. 

 Habitat. — Pecas River, N. M. (type). 

 I have never identified this species. 



Deromyia perplexa n. sp. 



% 9 • — Length 15-17 mm. — Small, rather olive-gray colored species 

 with black palpi and reddish antenna?; mystax white. Thoracic dor- 

 sum with three somewhat olive colored stripes, narrowly separated 

 from each other by a line of the same golden bloom that covers the 

 humeral angles, scutellum and lateral margins and the upper portion 

 of the pleura?; the lower portion of the latter paler, and the coxae 

 almost whitish pruinose. Abdomen reddish-brown, light golden pru- 

 inose on the sides, and in ceratin lights on the posterior margin of 

 the segments. Legs varying from brownish-yellow to blackish-yellow, 

 all the hair and bristles black; the hind tibia? on the inner side with 

 rather dense pale golden appressed pile. Wings tinged with fuscous, 

 clearer toward the base. 



Face and front pale golden pruinose; the occiput more brownish, 

 on the lower orbits whitish pruinose; beard fine, white. Proboscis 

 and palpi black. Antennas reddish, the third segment in one specimen 

 blackish distally; all the segments with black hair. Bristles of thor- 

 acic dorsum, scutellum and ocellar tubercle black ; of the upper 

 occiput, prothorax, before the halteres and on sides of the first ab- 

 dominal segment and on the coxa? yellowish or white. Patches of 

 black ground color may be seen beneath the bloom on the meso-, 

 sterno- and by hypopleura?. Abdomen reddish-brown, with short 

 pale hair; the lateral margins are blackish, but concealed beneath a 

 grayish, in certain lights, golden bloom. Venter grayish pruinose. 

 In the single female, two narrow black lines on the median stripe, and 

 two black spots on the lateral stripes, may be seen. 



Type. — The type series consists of three males and one fe- 

 male. Three males, co-types, deposited at the National Mu- 

 seum, Cat. No. 11,028. The one female at the University of 

 Kansas. The female specimen is the property of the Univer- 

 sity of Kansas. 



Habitat. — Rio Ruidoso, White Mts., N. M. 



