190 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



(fig. 133) yellow, rather long; third joint more or less blackened at 

 tip, a little longer than wide, somewhat oval in outline, hut pointed 

 at tip. Proboscis brown; palpi yellow. Lateral and inferior orbital 

 cilia white, about five of the upper cilia on each side black. 



Thorax green with coppery or bronze reflections; dorsum slightly 

 dulled with grayish pollen; pleurae dulled with white pollen. Abdo- 

 men green with bronze reflections, its sides with white pollen and 

 with yellowish hairs on second and third segments. Hypopygium 

 black; its lamellae (fig. \33a) of moderate size, somewhat triangular 

 in outline, but rather suddenly narrowed at base, whitish with a very 

 narrow black border on apical margin, this black widens at upper and 

 lower corners, jagged and bristly at apex, fringed above with little 

 black hairs. 



Fore coxae pale yellow, their anterior surface covered with white 

 pollen and minute white hairs. Middle and hind coxae yellow with 

 the outer surface more or less blackened. Femora and tibiae yellow. 

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

 ciliated on the lower inner edge with a few long yellowish hairs, the 

 longest of which are longer than the width of the femora. Posterior 

 tibiae very little thickened, their inner surface with a glabrous stripe 

 on basal half. Fore tarsi about one and a half times as long as their 

 tibiae, black from the tip of the first joint, which is about equal in 

 length to the two following joints taken together, third nearly as 

 long as second, fifth scarcely as long as fourth. Middle tarsi about 

 as long as their tibiae, black from the tip of the first joint, which has 

 a large bristle on upper side at apical third. Hind tarsi wholly black, 

 a little longer than their tibiae. Calypters and halteres yellow, the 

 former with yellow cilia, sometimes there may be a black hair among 

 them. 



Wings grayish, a little tinged with yellowish brown in front; costa 

 scarcely enlarged at tip of first vein, last section of fourth vein a 

 little bent before its middle; hind margin of wing a little indented 

 at tip of fifth vein; rather evenly rounded, but the anal angle some- 

 what prominent. 



Female. — Face wider than in the male but narrow for a female; 

 the front in one specimen is blue; fore tarsi but little longer than their 

 tibiae; fore coxae with more or less black hairs on inner half of their 

 anterior surface; hind tibiae without the glabrous stripe on inner 

 surface; hind femora without cilia below, but with a row of little 

 delicate white hairs on lower inner edge; otherwise as in the male. 

 Middle tibiae with three bristles below, one pair at apical third and 

 one bristle at basal third. 



Redescribed from many specimens. The Aldrich collection con- 

 tains specimens from Westville, New Jersey, August 14; Philadel- 

 phia, Pennsylvania, August 20; Delaware Water Gap, New Jersey, 



