296 A. L. MELANDER. 



ish to hyaline, with an elongated inconspicuous brown stigma; discal cell short; 

 the penultimate section of the fifth vein much shorter than the ultimate section ; 

 furcation of the third vein acute; fourth vein abbreviated, not reaching the mar- 

 gin. Knob of halteres black. Abdomen scarcely shining. Hypopygium small, 

 filament yellow, thick, with its tip concealed. 5 mm. 



Guerrero, Mexico (Smith). 



Empis triangiila Coqnillett. 

 Proc. Wash. Acad. Sci., 1901, p. 410. 



Black, the halteres and legs dark brown, knees yellow, tliis color rarely ex- 

 tending over the greater portion of the femora and sometimes of the tibiae, ven- 

 ter of abdomen of female largely yellow; eyes of male contiguous, third joint 

 of antennae nearly linear, at least five times as long as broad, the style scarcely 

 perceptible; proboscis from one and one-half to twice as long as height of head ; 

 hairs and bristles of thorax and scutellum black ; thorax somewhat polished, very 

 thinly gray pruinose, not distinctly vittate, scutellum bearing ten marginal bris- 

 tles; abdomen slightly polished, hypopygium rather large, obliquely ascending, 

 the lower piece bearing a cluster of rather long, black bristles at its apex, fila- 

 ment hidden, venter of abdomen destitute of processes and of spinous bristles; 

 legs simple, slender, almost bare ; wings hyaline, veins and stigma brown, second 

 snbmarginal cell somewhat triangular, pointed at its base, about one and one-half 

 times as long as broad, discal cell subequal in length to last section of fourth vein, 

 last section of fifth vein half as long as the preceding section. 2-3.5 mm. 



British Columbia ; Alaska : Tip of Last Vegas Range (Hudson- 

 ian Zone), New Mexico (T. D. A. Cockerell). 



Empis coriniis Walker. 

 List Dipt. Ins., iii, p. 496. 



Black (male\ or cinereous (female). Ijip, eyes and feelers black; chest of the 

 female adorned with three indistinct hoary stripes; hind borders of the abdomi- 

 nal segments of the female hoary ; legs black ; knees tawny ; shanks and feet 

 piceous; wings colorless, rather broad; wing-ribs and veins piceous, the latter 

 strongly marked ; poisers piceous. 4 mm. 



Hudson's Bay, St. Martin's Falls, Albany River (Barnston). 

 A mutilated specimen from Colorado may belong here. 



Einpis luctuosa Kirby. 

 Empis luctuosn Kirby, N. A. Zool. Ins., 311, 2. 

 Empis genicidata Kirby, ibid. 



Body entirely black. Proboscis very little longer than the head ; wings a little, 

 embrowned, with a large black stigma, irridescent, nervures black. Length of 

 body including wings 6 mm. 



British America. 



E. geniculate Kirby. — Almost black. Wings slightly embrowned, beauti- 

 fully irridescent; legs, where the shank is united to the thigh, white. Proboscis 

 nearly as long as the thorax. Length 6 mm. 



