BIRDS FROM BRAZIL AND SOUTHERN VENEZUELA—FRIEDMANN 387 
LEUCOPTERNIS MELANOPS (Latham): Black-faced Hawk 
Falco melanops LatHam, Index ornithologicus, vol. 1, 1790, p. 37 (Cayenne). 
SPECIMENS COLLECTED 
1 ad. 9, Brazil, Cucuhy, Rio Negro, February 8, 1930. 
3 ad. o, 2 ad. 9, Venezuela, Cerro Yapacana, Upper Orinoco, March 31- 
April 28, 1931. 
A male collected April 28 was noted as being in breeding condition 
when shot. 
As far as I know this fine hawk has not been recorded before from 
the Rio Negro area. It was not known from Venezuela until very 
recently when Gilliard (Bull. Amer. Mus. Nat. Hist., vol. 77, 1941, 
pp. 458-459) listed specimens from the Caura River and Mount 
Auyan-tepui. 
This series agrees with material from British Guiana. The width 
of the black streaks on the top of the head and interscapulars is very 
variable; apparently it averages broader in males and narrower in 
females. A British Guiana unsexed bird is, however, the most broadly 
streaked one I have seen. Gilliard (cit. supra) writes that comparison 
of a female taken at Mount Auy4n-tepuf with four nearly topotypical 
specimens “indicates that our specimen may prove worthy of recog- 
nition when more material is obtained. Chiefly the Auy&n-tepui 
specimen disagrees with the series at hand by having ground color on 
head and neck white, not suffused with buff; by having broader darker 
shaft streaks on head, nape, shoulders, malar region, auriculars, and 
anterior flanks, by having dark upperparts, including tail, black instead 
of brownish black, and, finally, by having no suggestion of the white 
tail tipping, present in all others. It averages larger than true 
melanops: wing 234.5; tail 147; culmen from base 29.5; exposed culmen 
21; tarsus66 ...’’mm. The present series, which should belong with 
the Mount Auyan-tepui bird, completely negatives the characters of 
the dark shaft streaks on the head, nape, and shoulders, and of the 
white tail tipping (present in five of our six examples). Our British 
Guiana bird (unsexed) is just as black on the dark areas of the upper- 
parts and tail as our Orinoco and Rio Negro birds and has the ground 
color of the head and neck just as white, just as little tinged with 
buffy, as in them. None of our specimens from Brazil, Venezuela, or 
British Guiana have any dark shaft streaks on the anterior flanks. 
Another specimen taken at Playa de Candela, on the Brazo Casi- 
quiare, February 10, was saved in alcohol. 
HYPOMORPHNUS URUBITINGA URUBITINGA (Gmelin): Brazilian Urubitinga 
Falco urubitinga GMELIN, Systema naturae, pt. 1, 1788, p. 265 (Brazil). 
SPECIMENS COLLECIED 
lim. @, 1 im, -, Venezuela, Cerro Yapacana, April 6-26, 1931. 
Widely distributed throughout the areas traversed by the expedition. 
