SOUTH AMERICAN DIPTEEA. 279 



62. Eristalis obsoletus Wied. 



Two specimens, Rio de Janeiro and Chapada. I would only add 

 to Schiner's remarks that the pile of the femora is variable. 



63. Eristalis ochraceus n. sp. 



% . Length 12 luiu. Face yellow, thickly covered with light ochraceous yel- 

 low pollen; cheeks shining red. Front tinged a little darker than the face, 

 with yellow pile. Antennae and bare arista light reddish yellow. Eyes briefly 

 pilose, the facets on upper half distinctly enlarged. Mesonotum densely 

 opaque ochraceous yellow, with similar colored pile; four or six slender stripes, 

 feebly indicated. Pleurse lighter colored than the mesonotum. Scutellum 

 opaque reddish yellow. Fii-st abdominal segment whitish yellow ; second seg- 

 ment of the color of the scutellum, with a slender blackish brown anterior mar- 

 gin, a linear brown stripe, and a narrow posterior blackish brown band in front 

 of the yellow hind margin ; third segment blackish, with a red lateral spot and 

 hind margin, and a narrow entire shining median band ; fourth segment opaque 

 blackish, with a shining metallic band ; hypopygium shining. Legs red ; base of 

 the tibise and the tarsi, except their tips, yellow; distal portion of hind femora, 

 and a ring on the hind tibise, blackish, the distal part of front femora and 

 tibiae brownish red. Wings pure hyaline; veins reddish. 



One specimen, Chapada. 



64. Eristalis furcatus Wied. 



Two specimens, Rio de Janeiro and Chapada. The scutellum is 

 as Wiedemann describes it. The synonymy offureatus Macq. admits 

 of no doubt. 



65. Eristalis scntellaris Fabr. 



Numerous specimens from Chapada and Rio de Janeiro. In one 

 female specimen only, are there yellow spots on the second segment 

 of the abdomen. Doliosyrphus Riley'i Will, is the same, as I sus- 

 pected. 



66. Eristalis coiiictis Fabr. 



Twelve specimens, Rio de Janeiro and Chapada. Is closely allied 

 to scutellaris, but will be distinguished in the female by the front 

 being broad above, by the tibire, especially the hind pair, being 

 lighter colored, by the median opaque stripe of the second abdominal 

 segment not reaching the posterior band, by the smaller size, etc. 

 The males differ, besides in the facial profile, in the antennse being 

 longer than in scidellavis. The margins of the scutellum are beset 

 with short, dense, velvety black pile ; the yellow spots of the ab- 

 domen are smaller, the hind femora larger, etc. 



