246 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



No. 180. DOLICHOPUS DOMESTICIS, new .siecies. 



Male. — Length 4.75-5.2 mm. ; of wing 5 mm. Face rather narrow, 

 yellowish, more silvery below. Front shining green, in one specimen 

 violet. Antennae yellow; third joint infuscated on apical half, 

 longer than wide, pointed at tip. Lateral and inferior orbital cilia 

 whitish; about five of the upper cilia on each side black. 



Thorax shining green; dorsum with violet reflections, and with 

 thin gray pollen along the front. Abdomen green with coppery 

 reflections and black incisures; the white pollen on its sides abundant. 

 Hypopygium black with green reflections; its lamellae (fig. 180a) of 

 moderate size, somewhat subquadrate, but narrowing into the stem; 

 this narrowing is about equal on each side dnd they are cut off 

 nearly straight at apex; white with a narrow black edge at apical 

 corners, jagged and bristly at apex. 



Coxae, femora, and tibiae yellow. Middle coxae, and sometimes 

 the hind pair, a little blackened on outer surface; anterior surface 

 of fore coxae with silvery pollen and very minute pale hairs. Middle 

 and hind femora each with one preapical bristle, the latter ciliated 

 on lower inner edge with long slender j^ellow hairs, the longest of 

 which are near the middle and a little longer than the width of the 

 femora, from the middle of the feniora to the base the cilia are con- 

 tinued by little yellow hairs. Posterior tibiae only a little thickened, 

 their inner surface with a glabrous space near the base, which is 

 about one-third as long as the tibia. All tarsi black from the tip 

 of the first joint; middle tarsi one and a fourth, fore and hind tarsi 

 one and a third times as long as their tibiae; fore tarsi with the joints 

 of decreasing length; middle basitarsi with one large bristle above. 

 Calypters and halteres yellow, the former with black cilia. 



Wings (fig. 180) grayish; costa very slightly enlarged at tip of 

 first vein; last section of fourth vein a little bent just beyond its 

 basal third; hind margin of wing slightly indented at tip of fifth 

 vein; anal angle rather prominent. 



Female. — Face wider, but narrow for a female; third antennal 

 joint smaller and less infuscated; tarsi about as in the male, except 

 that they are a little shorter; hind femora with a row of very small 

 yellow hairs on lower inner edge; hind tibiae more slender and with- 

 out the glabrous stripe on inner side; wing about as in the male. 



Described from 3 males and 2 females; 1 male and the 2 females 

 were taken at Westville, New Jersey (Johnson), July 21; 1 male at 

 East Aurora, New York, August 7; and 1 male in the Loew collection 

 taken at New York. 



Type.—UoXe, Cat. No. 23054, U.S.N.M. from East Aurora, New 

 York. 



This species comes close to scapularis Loew, but the humeri are 

 not at all yellow nor is there any yellow on the thorax. It differs 



