258 Journal New York Entomological Society, f^'oi. xxi. 



Ovipositor short, wedge-shaped, about as long as the other abdominal seg- 

 ments, {melampyga Loew.) 6i. 



6i. Tibiae and tarsi wholly black, the femora yellow varied with black; abdom- 

 inal segments fasciate with black and yellow. (N. Y., N". Max.) 



melampyga var. flavonigra Coquillett. 

 Femora, tibiae and tarsi largely yellow ; abdomen not conspicuously fasci- 

 ate 62. 



62. Genitalia shining black, contrasting with the abdomen, (flaviveutris John- 



son, 1902, and not of Strobl, 1898, which is grossicornis Zetterstedt.) 

 (D. C, Mass.,* N. H., N. Y., N. J., La., Wise.,* Col., Wyom., N. 



Mex.*) melampyga Loew, sens. str. 



Genitalia concolorous with the yellow-brown abdomen. (W. Ind., Bolivia,* 

 Tex.,* 111.*) melampyga var. sorosis Williston. 



63. Abdomen black above, the sides not yellowish, but the incisures somewhat 



yellow 64. 



Sides of the abdomen somewhat yellow 66. 



64. Discal cell very small, coextensive with the auxiliary cell, the second and 



third sections of the fourth vein about i: 10; legs with at least the 

 femora yellow; antennae yellow, sometimes dusky at the tip. (Eur.;* 

 Mass.,* 111.,* La.,* Tex.,* Id.,* Wash.*) . . .scutellata Fallens, sens. str. 

 Discal cell surpassing the auxiliary cell, the sections of the fourth vein 

 about 1:8; legs darker 65. 



65. Legs, including the femora, somewhat infuscated. (brassiccr Riley.) 



(Eur. ;* U. S.) scutellata var. pascuum Meigen. 



Legs black except the knees; third antennal joint somewhat darkened at 

 the tip. (Eur.;* Af r. ; Id.,* Vs^dish.*) . .scutellata var. orbona Meigen. 



66. Legs mostly yellow; usually larger species. (Eur.;* Wash.,* Cal.*) 



scutellata var. variegata Meigen. 

 Legs black except the knees; third antennal joint darkened at the tip. 

 (pictella Thomson.) (Eur.;* Id.,* Wash.,* Ore.,* Cal.) 



scutellata var. puella Meigen. 



Domomyza tamia new species. 



(^ 5. Length 2.75 mm. Blue-black species with black halteres ; face 

 receding in profile; wings broad, veins black, the costa evanescent beyond the 

 third vein ; calypteres white and fringed with white hairs. Black, with metallic 

 blue and green reflections. Head dull black, not metallic ; front as broad as 

 high, opaque blackish, no lateral shining stripes, the usual shining portion 

 around the ocelli blunt in front, not triangular, seven fronto-orbital bristles, 

 the orbital pubescence, i. e., that between the bristles and the eyes, compara- 

 tively long and dense; mouth-opening greatly arched, so that the end of the 

 clypeus is directly under the antennae, the face thereby appearing to recede in 

 profile, the face rather sharply carinate by the descending lunule, the antennal 

 grooves deep ; cheeks two thirds as deep as the eye-height, the hairs along the 

 oral margins not conspicuous. Antennas small and black, the outer joint not 



