24 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



except its base, second joint dark luteous, middle tarsi dilutely luleous^ 

 tlio tliird joint subfuscous, the last two joints black, bind tarsi black,- 

 ?';e metatarsi moderately thickened, their tip and the two following 

 joints dilutely luteous. Tegnlae white. Halteres light yellowish. AVings 

 cinereous hyaline ; stigma subfuscous, spurious vein nearly obsolete, ex- 

 cei)t its node. 



Translation, compared with the type specimen in the Cambridge Mu- 

 seum. 



Pipiza modesta. 



Tnglyphus modestus Loew, Centur., iv, 62. 

 Habitat— ^ew York (Lw.) ! 



9 . Blackish steel-colored, clothed with short white pile ; hind tibiae 

 white pilose ; knees, base of tibiae, and the tarsi, except the tip and the 

 front and hind metatarsi, light lutescent. Length, 5.5'"™. 



Blackish steely, moderately shining, clothed with short white pile ; 

 with four obscure dorsal lines. Front rather broad, shining, with a tri- 

 angular white pollinose spot on each side; pile rather long, on the 

 lower half and on the vertex white, on the upper half black. Antennae 

 rather long, black, third joint oblong ovate, below obscurely reddish. 

 Dorsum of thorax and scutellum briefly white pilose. Abdomen deli- 

 cately punctulate, shining, short white pilose. Legs black, the short 

 pile white, hind tibiae white pilose above ; knees, base of hind tibiae, 

 and the basal half of the front and middle pairs, dilutely lutescent; 

 tirst joint of the front tarsi fuscous, tip lutescent, second joint dilutely 

 luteous, remaining joints black ; first two joints of the middle tarsi di- 

 lutely lutescent, third subfuscous, last two black ; first joint of hind 

 tarsi moderately thickened, black, tip luteous, second joint dilutely lu- 

 teous, third more obscure, fourth and fifth black. Tegulae white. Hal- 

 teres dilutely yellowish. Wings hyaline; stigma subfuscous. 



Translation, compared with the type specimen in the Loew collec- 

 tion. 



Pipiza calcarata. 



I'ipiza calcarata Loew, Centur., vi, 42. 



Habitat. — New York (Lw.) ! 



S . Bronze-black, white pilose, frontal triangle and the face wholly 

 black pilose; antennae black, below reddish. Legs black, the knees, 

 front tibiae, except a blackish ring, basal half of the middle tibiae, first 

 three joints of the front and middle, and second and third of the hind 

 tarsi, luteous, hind coxae with a slender process. Wings cinerescent, ex- 

 cept the basal third. Length of body G.5™™; of wings 6«>™. 



Bronze-black, moderately shining, white pilose. Pile of tiie eyes 

 whitish, in some lights blackish or black. Pile of the frontal triangle 

 and of the face wholly black ; antennae black, below reddish, tliird 

 joint oblong ; pile of abdomen very short, black, on the lateral margins 

 and the usual metallic spots longer, white ; legs black ; front tibia3, ex- 



