J. R. MALLOCH 137 



is a synonym of auf<oba Walker, which lielongs to the genus Coen- 

 osia) ; Nortli Mountain, Pennsylvania, September 1 ; Falls Church, 

 Virginia, June 28, 1912, (C. T. Greene); Rowayton, Connecticut, 

 June 16, 1909; Danbury, Connecticut, June 15; Mt. Ascutney, 

 Vermont, July 11, 1908; Brookline, Massachusetts, September 6; 

 Sharon, Massachusetts August 3; Chester, Massachusetts, 

 July 25, 1913; Buttonwoods, Rhode Island, June 22, 1912, (C. W. 

 Johnson); Broad Top, Texas. 



One male from the same place, and with the same date, as the 

 type tliff'ers from it in having the fore femora pale, but in other 

 rc^spects agrees with it and evidently is the same species. 



Helina hylemyioides sp. n. 



Female. — Black, covered with yellowish gray i)ruinescence. Head entirely 

 black. Thorax subopaque, with two narrow^ distinctly separated vittae 

 on anterior half between the dorso-centrals. Abdomen with an irregular 

 central stripe and lateral checkering on dorsum. Legs black. Wings yellow 

 at bases, the cross-veins slightly infuscated. Calyptrae yellow. Halteres 

 yellow. 



Frons at least one-third as wide as head at vertex, slightly broadi-ncd 

 anteriorly, triangle very short, orbits narrow, with a few setulose hairs in 

 addition to the five to six bristles; eyes almost bare; third antennal joint 

 narrow, reaching almost to mouth-margin; arista haired to apex, the longest 

 hairs about as long as width of third antennal joint; cheek slightly over one- 

 third as high as eye, marginal bristles irregular, the upper two or three rows 

 weak, no upwardly curved bristles present. Thorax without strong pre- 

 sutural acrostichals; postsutural dorso-centrals, three; prealar bristle long; 

 sternopleurals, three, the lower posterior one weak; ventral surface of scutel- 

 lum with weak erect hairs to apex. Basal abdominal sternite with a few 

 setulose hairs. Fore tibia with one posterior bristle; fore tarsi not thickened, 

 longer than tibia; mid tibia with one or two antero-dorsal, two postero-dorsal, 

 and two or three postero-ventral bristles; hind femur with long hair-like 

 bristles from base to near apex on postero-ventral surface, and a few stronger 

 bristles on apical half of antero-ventral surface; hind tibia with two strong 

 antero-dorsal and four weaker antero-ventral bristles. Third vein bare at 

 base; costal thorns long; veins th.ree and four divergent ajMcally. Length, 

 7 nun. 



Type.— 9 ; Field, British Columl)ia, July 2, 1906, (S. Brown), 

 [A. N. S. P., Type no. 6224]. Paratype.s.—Fomalos; Grant, Colo- 

 rad(^ altitude 9500 to 10,000 feet, July 21 and 22, 1906, (L. O. 

 Jackson). 



This species bears a close reseml)lance to tlie group containing 

 luconnii, but has only three sternopleural bi'istles. The scutellum 



TRANS. AM. ENT. .SOC, XLVI. 



