BIRDS FROM BRAZIL AND SOUTHERN VENEZUELA—FRIEDMANN 465 
lim. ¢, Brazil, Serra Imeri, near Salto do Hud, December 6, 1930. 
6ad. #, lim. &, 4ad. ?, Brazil, Sao Gabriel, Rio Negro, December 26, 1930— 
January 14, 1931. 
lad. 9, Colombian bank of Rio Negro opposite San Carlos, January 29, 1931. 
1 ad. o, Venezuela, San Carlos, Rio Negro, January 28, 1931. 
2 ad. co’, Venezuela, Brazo Casiquiare, mouth of Cafio Atamoni, February 6, 
1931. 
lad. ¢, Venezuela, Brazo Casiquiare, below mouth of Rfo Pacila, February 12, 
1931. 
1 ad. -, Venezuela, Brazo Casiquiare, Cafio Caripo, February 22, 1931. 
1 ad. @, Venezuela, San Antonio, Upper Orinoco, March 9, 1931. 
1 ad. 9, Venezuela, Upper Orinoco, right bank opposite Corocoro Island, 
March 13, 1931. 
3 ad. o’, lim. @, 3 ad. 2, Venezuela, Cerro Yapacana, Upper Orinoco, March 
93-April 29, 1931. 
One of the April birds was noted as being in breeding condition; 
some of the February examples show evidences of molt. 
This fine series is remarkably uniform. The darkest examples are 
from Venezuela, but others from the same localities are not so dark; 
the extremes in variation are slight at best. 
In addition to the specimens listed above, 5 others were preserved 
in alcohol; 2 were taken at Sao Gabriel, January 10-12, 1931; 3 were 
collected at Salto do Hud, November 20-21, 1930. 
MYRMOTHERULA[BRACHYURA BRACHYURA (Hermann): Pygmy Ant-wren 
Muscicapa brachyura HERMANN, Tabula affinitatum animalium..., 1783, 
p. 299, note (based on “Le petit Gobe-mouche tacheté, de Cayenne” Buffon). 
SPECIMENS COLLECTED 
lad. #, lad. ?, Brazil, Sao Gabriel, Rio Negro, January 3-9, 1931. 
lad. 2, Brazil, Salto do Hud, Rio Maturacd’, November 20, 1930. 
1 ad. @, Colombian bank of the Rio Negro opposite San Carlos, January 29, 
1931. 
lad. ¢, Venezuela, Upper Orinoco, near Cerro Cariche, February 24, 1931. 
MYRMOTHERULA AMBIGUA Zimmer: Zimmer’s Ant-wren 
Myrmotherula ambigua ZIMMER, Amer. Mus. Nov., No. 523, 1932, p. 5 (Playa del 
Rio Base, Mount Duida, Venezuela, altitude 550 feet). 
SPECIMENS COLLECTED 
lim. ?, Brazil, Sao Gabriel, Rio Negro, December 31, 1930. 
1 ad. — (= 2), Venezuela, Brazo Casiquiare, Cafio Caripo, February 22, 1931. 
These two specimens agree with the description of M. ambigua. 
The Sao Gabriel one constitutes a slight extension of the known range. 
MYRMOTHERULA SURINAMENSIS SURINAMENSIS (Gmelin): Surinam Ant-wren 
Sitta surinamensis GMELIN, Systema naturae, vol. 1, pt. 1, 1788, p. 442 (based on 
“Surinam Nuthatch” Latham, A general synopsis of birds, vol. 1, pt. 2, p. 
654, pl. 28: Surinam). 
SPECIMENS COLLECTED 
1 ad. 0’, 1 ad. 9, Venezuela, Brazo Casiquiare, Raudal Corocoro, February 
9, 1931. 
