J, R. MALLOCH 261 



Type. — North East Truchas Peak, New ^Mexico, above tim- 

 ber line, August 2, (W. P. Cockerell), [U. S. N. M.]. 



A rather aberrant species. The orbital 1)risthng shows an 

 approach to that of the genus Dendrophaonia, but the cheeks, 

 thorax, and legs are bristled differently from those of the species 

 of that genus. 



Phaonia azygos new species 



Male and female. — Black, subopaque, densely pale gray pruinescent. 

 Thorax with two faint fuscous vittae anteriorly which do not extend beyond 

 middle of dorsum. Abdomen with one elongate black spot in middle of each 

 tergite, which form an almost uninterrupted vitta, the spot on fourth tergite 

 very faint. Legs black, the knees slightly reddish in female. Wings slightly 

 grayish, the cross-veins faintly browned. Calyptrae white. Halteres yellow. 



Male. — Ej-es very faintly hairy; frons on upper half very narrow, consisting 

 of the whitish contiguous orbits, the setulae confined to anterior half; para- 

 facials almost linear; cheek twice as high as width of third antennal segment, 

 sparsely bristled on lower margin, two or three of the bristles upcurved; 

 arista plumose; third antennal segment three times as long as wide. Pre- 

 sutural acrostichal bristles absent, the hairs fine, in al)Out four series; post- 

 sutural dorsocentrals three; prealar long; sternopleurals one to two; no hairs 

 near notoj^leurals. Abdomen ovate; basal sternite bare. Fore tibia without 

 a median posterior bristle; fore tarsus slender, longer than tibia, without erect 

 sensory hairs along sides of basal segment; mid femur with a complete series 

 of fine bristles on posteroventral surface which become shorter apically; mid 

 tibia with two posterior bristles; hind femur with a complete series of antero- 

 ventral bristles which become longer apically, and some shorter bristles on 

 apical half or less of postei'oventral surface; hind tibia with one anterodorsal 

 and two anteroventral bristles, the calcar short, about one-fifth from apex, 

 apical anterodorsal and anterior bristles subequal, apical posterodorsal 

 absent. Outer cross-vein almost straight; veins three and four divergent at 

 extreme apices. 



Female. — Frons normal; hind femur with three or four anteroventral 

 bristles on apical third. 



Length, 5 mm. 



Type. — ]\Iale; Black Mountain, Lake George, New York, 

 September 4, 1920: allotype, female; Thatcher Park, Heldeberg 

 Mountains, Albany, New York, May 27, 1920, (H. C. Huckett), 

 [Amer. Entom. Soc.]. 



This species runs to nigrocincfa Stein in Stein's key, but that 

 species does not occur in North America. 



TRANS. AM. ENT. SOC,. XLVIII. 



