242 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



the upper half or two-thirds, yellowish-red below; the arista reddish. 

 Thorax beset with blackish or lutescent pile, lateral margins and a 

 stripe of even width each side of the middle, cinereous pollinose; bris- 

 tles black; scutellum lutescent or yellowish, with short yellow pile. 

 Abdomen pure bronze-colored, densely beset with short golden-yellow 

 pile in the female, somewhat darker in the male; the black sub-opaque 

 hind borders of second and third segments sub-interrupted. Legs sat- 

 urate yellow; the last two joints of tarsi inluscated or blackish; the 

 four front femora (male ?) may have a dark-brown spot in front. Wings 

 yellowish hyaline on the antero-proximal portion, grayish hyaline along 

 the posterior portion ; costal cell yellow, stigma darker; a brown cloud, 

 in the shape of a short cross-band, between the origin of the third vein 

 and the cross-vein at the base of the last posterior cell ; anterior cross- 

 vein likewise clouded with brown. 



Four specimens (D. W. Coquillett, Professor Riley, G. J. Bowles). 



Chrysochlamys buccata. 



ChrysochlamyH buccata Loew, Centur., iv, 72. 



Habitat. — Virginia (Lw.). 



9 . Length, S""^. Bronze colored; scutellum testaceous; front black, 

 with a cross-band of ochraceous pollen in the middle; antennae black 

 above, reddish below; arista reddish; cheeks with a black stripe. 

 Blackish-bronze colored, greenish shining; front deep black, shining, 

 with short black pile ; in the middle a rather broad cross-baud of ochra- 

 ceous pollen. Antennae rather large; first joint black, the second and 

 third joints black above, reddish below ; arista bare, reddish. Face reit- 

 \lish yellowish, very concave and ochraceous pollinose above, swollen 

 below, with a large obtuse, somewhat brownish tubercle; cheeks sep- 

 arated from the face by a narrow black stripe. Dorsum of thorax 

 clothed with short lutescent pile ; lateral margins, and two longitudinal 

 stripes of even width, cinereous pollinose. Scutellum reddish, with 

 short lutescent pile; bristles on the margin black; lateral corners 

 blackish. Abdomen shining, with short lutescent pile; hind margin of 

 first and second segments opaque black. Legs ochraceous, the basal 

 half of the four front femora and the tip of all the tarsi black; front 

 tibiae, except the base and tip, and the base of the hind femora, slightly 

 subinfuscated. Wings somewhat cinereous hyaline, lutescent near the 

 base; costal cell and stigma luteous, the base of the third vein and the 

 cross-veins at the middle of the wing clouded with black.— Translation. 



Chrysochlamys nigripes. 



CJirijsocldamris nigripes Oaten Sackeu, West. Dipt., 341. 



Habitat. — Massachusetts (O. S.). 



" ^ , $ . Length, about 9°*™. General color much duller than in G. 

 dives, metallic blackish-green ; pollen on the face and front dull yellow- 

 ish; frontal pollinose cross-band ( 9 ) much narrower, and hence the 



