AMERICAN DIPTERA. 275 



dorsum, the black base to the antennse, the solid black of the base 

 of the abdomen, and the luteous halteres and legs, are all peculiar 

 to this species. 



Described from three females, from Jackson's Lake, AVyoming. 

 Collected by Dr. Wm. M. Wheeler. 



Horinopeza nigricaiiis Loew. 

 Cent. V, 66. 



Wholly black, with pale pile. Head concolorous, eyes of the male contiguous. 

 Antennae short, black, third joint oval, the basal joint of the short style thick, 

 the apical one slender. Proboscis very short, thick, blunt, blackish brown ; palpi 

 small, recurved, dull white. Thorax opaque, cinereo-pollinose. Scutellum con- 

 colorous. Abdomen black, shining, hypopygium the same. Legs black, the 

 apex of the coxse and the knees luteous. Knob of the halteres blackish brown. 

 Wings cinereous hyaline, stigma and veins fuscous. 4.1 mm. 



Yukon River (Kennicott) ; Moscow, Idaho (J. M. Aldrich). 



GL.OMA Meigen. V- C/ ~ ''' ^ / 



Species of blackish or yellowish color. Antennae shorter than 

 the head, third joint oval, with a rather stout terminal arista, pro 

 boscis thick, not longer than the head. Eyes of the male contigu- 

 ous above, of the female separated. Thorax rather prominent; 

 abdomen compressed. Legs simple, the hind ones lengthened. 

 Wings rather broad, the third vein imperfectly (?) forked ; discal 

 cell with three veins; anal cell shorter than the second basal, both 

 bounded by a cross vein almost parallel with the hind margin. 



Yellow, red above ; tarsi fuscous towards tip rtifa Loew. 



Black, abdomen yellowish basally 2. 



2. Legs simple obscura Loew. 



Front tarsi and middle tibiae in part swollen and hairy. 



scopifera Coquillett. 



The generic position of Gloma phthia Walker* cannot be de- 

 termined from his description. It is therefore useless to repeat the 

 diagnosis. 



Gloma riifa Loew. 

 Cent. V, 67. 



Yellow, reddish above, black-pilose. Head black, cinereous with white pollen. 

 Proboscis and palpi yellow. First two joints of the antennae rather short, yellow, 

 black-pilose; third joint black, ovate, apex subacute, the seta rather thick, black. 

 Tarsi fuscous towards the apex. Wings grayish yellow, stigma tinged a little 

 darker, veins pale fuscous, yellow towards base and costa. 5 mm. 



New Hampshire (Osten Sacken). 



* Walker, List of Dipterous Insects, etc., iii, p. 492. 



TRANS. AM. ENT. SOC, XXVIII. AUGUST, 1902. 



