388 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 9 
SPIZAETUS ORNATUS ORNATUS (Daudin): Crested Eagle Hawk 
Falco ornatus Daupin, Traité d’ornithologie, vol. 2, 1800, p. 77 (Cayenne). 
SPECIMEN COLLECTED 
lad. 9, Venezuela, Cerro Yapacana, Upper Orinoco, April 7, 1931. 
The nominate race of this fine bird occurs throughout the countries 
collected in by the expedition. It is replaced by an allied form S. o. 
vicarius in Central America and western South America. 
The specimen is in good, fresh plumage. 
CIRCUS BUFFONI (Gmelin): Buffon’s Marsh Hawk 
Falco buffont GMELIN, Systema naturae, vol. 1, pt. 1, 1788, p. 277 (Cayenne). 
SPECIMEN COLLECTED 
1 ad. o, Venezuela, near Soledad, Anzodtegui, December 1, 1929. 
The bird collected is in good, fresh plumage. 
This marsh hawk is a bird of eastern South America from Venezuela 
and the Guianas to the Straits of Magellan; it is rare in Chile. I 
know of no definite previous record from Venezuela as far to the west 
as Soledad, although Chapman (Bull. Amer. Mus. Nat. Hist., vol. 36, 
1917, p. 240) lists two melanistic birds, probably of this species, from 
as far west as the Rio Frio, Colombia. 
GERANOSPIZA CAERULESCENS (Vieillot): Gray Crane-Hawk 
Sparvius caerulescens Vie1tuot, Nouv. Dict. Hist. Nat., vol. 10, 1817, p. 318 
(South America; Cayenne). 
SPECIMEN COLLECTED 
1 ad. o&, Venezuela, Puerto Ayacucho, Rfo Orinoco, May 20, 1931. 
This single specimen obtained is narrowly barred with white below. 
It measures: Wing 270, tail 214,culmen from cere 18.4, tarsus 77.2 mm. 
Although known from Venezuela and the Guianas south to northern 
Brazil (Santarém, Obidos, Rio Caissary, etc.) this hawk does not 
appear to have been recorded as yet from the Rio Negro. 
Family FALCONIDAE: Falcons, etc. 
MICRASTUR SEMITORQUATUS SEMITORQUATUS (Vieillot): Collared Harrier-Falcon 
Sparvius semi-torquatus Vie1Luot, Nouv. Dict. Hist. Nat., vol. 10, 1817, p. 322 
(Paraguay, ex Azara). 
SPECIMEN COLLECTED 
1 ad. 9, Venezuela, Cerro Yapacana, Upper Orinoco, April 5, 1931. 
The bird was noted as being in breeding condition when collected; 
it had a shell-less egg in the oviduct. 
It has the following dimensions: Wing (abraded) 266+, tail 
(abraded) 243+, culmen from cere 20.8, tarsus 90 mm., and therefore 
agrees with the nominate race of which it is probably one of the north- 
ernmost examples on record. As far as I have been able to learn, it is 
