496 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
1 ad. o&, Venezuela, Upper Orinoco, right bank, opposite Corocoro Island, 
March 14, 1931. 
8 ad. of, lim. o, 2 ad. 9, 2 ad. - [prob. 9], Venezuela, Cerro Yapacana, 
Upper Orinoco, March 21—April 29, 1931. 
lad. o&, Venezuela, Puerto Ayacucho, Rio Orinoco, May 15, 1931. 
The present specimens appear to constitute an extension of known 
range of the species into the Upper Orinoco Basin. Previously the 
only Venezuelan records, as far as we have found, were from Mount 
Roraima. The species was known from the Rio Negro, in the ad- 
jacent portion of Brazil to the south. 
This series agrees with birds from British Guiana examined in the 
present study. 
TYRANNEUTES STOLZMANNI (Hellmayr): Stolzmann’s Manakin 
Pipra stolemanni HELLMAyR, Ibis, 1906, p. 44 (Marabitanas, Rio Negro, Brazil), 
SPECIMENS COLLECTED 
1 ad. o, Brazil, Serra Imeri, Rio Maturac4, Brazilian—Venezuelan line, De- 
cember 1, 1930. 
2 ad. o", Brazil, SA0 Gabriel, Rio Negro, Amazonas, January 14-16, 1931. 
1 ad. @, Venezuela, Brazo Casiquiare, mouth of Cafio Atamoni, February 6, 
1931. 
4 ad. o, Venezuela, Cerro Yapacana, Rfo Orinoco, April 11-28, 1931. 
The eight specimens average slightly brighter yellow on the under- 
parts than a male from Santarém, or a female from Para. 
MANACUS MANACUS MANACUS (Linnaeus): White-bearded Manakin 
Pipra manacus LinnazEus, Systema naturae, ed. 12, vol. 1, 1766, p. 340 (Surinam). 
SPECIMEN COLLECTED 
1 9, Brazil, Mandéos, Amazonas, September 26, 1930. 
This specimen is identified to subspecies solely on geographic grounds 
as females are not racially diagnostic. Birds from Manéos have been 
identified as belonging to the nominate form by several recent in- 
vestigators—Hellmayr, Zimmer, Pinto, and others. 
MANACUS MANACUS INTERIOR Chapman: Upper Amazonian Manakin 
Manacus manacus interior CHAPMAN, Bull. Amer. Mus. Nat. Hist., vol. 33, 1914, 
p. 624 (Villavicencio, eastern Colombia). 
SPECIMENS COLLECTED 
5 ad. o', lad. 9, Brazil, Sio Gabriel, Rio Negro, January 14-17, 1931. 
These specimens agree with others from Bogotdé, Colombia, and 
with the description, and with the comments of recent authors. 
Judged by published records this race extends northward in the Caura 
Valley of Venezuela but not in that of the Upper Orinoco, where it is 
replaced by the next form, M. m. umbrosus. 
MANACUS MANACUS UMBROSUS Friedmann: Orinoco Manakin 
Manacus manacus umbrosus FRIEDMANN, Proc. Biol. Soc. Washington, vol. 57, 
1944, p. 99 (Cerro Yapacana, Upper Orinoeo, Venezuela). 
