474 PROCEEDINGS OF THE NATIONAL MUSEUM vou. 97 
lad. #, 1 ad. 9, Brazil, Cachoeira Thomaz, Rio Cauabury, October 27, 1930. 
lad. 9, 1im.-, Brazil, Rio Cauabury, November 4-5, 1930. 
2 ad. o’, 1 ad. 9, 1 ad. -, Brazil, So Gabriel, Rio Negro, November 9, Decem- 
ber 31, 1930, and January 2-6, 1931. 
1 ad. 3, lim. @,1im.-, Brazil, Salto do Hud, Rio Maturacd, November 19-22, 
1930. 
lad. #, 1 ad. 9,1 ad.-, Brazil, Serra Imeri, near Salto do Hud, Venezuelan 
border, December 3-4, 1930. 
lad. 9, 1 ad.-, Venezuela, Chapazon, Brazo Casiquiare, January 30, 1931. 
1 im. —, Venezuela, Raudal San Sebastiin, Brazo Casiquiare, February 1, 1931. 
1 ad. o&, Venezuela, Solano, Brazo Casiquiare, February 2, 1931. 
lad. o&, Venezuela, Cerro Guanari, Brazo Casiquiare, February 4, 1931. 
1 ad. &, 1 ad. -, Venezuela, Brazo Casiquiare below mouth of Rfo Pacila, 
February 12, 1931. 
2 ad. o#, 1 ad. 9, Venezuela, San Antonio, Upper Orinoco, March 4-8, 1931. 
10 ad. #1, 7ad. 9, 3ad.-,3im. 2, Venezuela, Cerro Yapacana ,Upper Orinoco, 
March 18—April 27, 1931. 
A common bird along the Rio Negro, the Casiquiare, and the Upper 
Orinoco. Females are more brownish, less grayish, on the upper 
back than are the males, and on the basis of this character it would 
be possible, if desired, to guess the sex of those specimens left without 
such determinations in the field. The variation in the dark markings 
is very considerable, the tendency to streaking and to barring being 
quite unequal in different specimens. 
In addition to the skins listed above, four birds were preserved in 
alcohol—two from Santa Isabel, October 9-November 21, 1930; one 
from Sao Gabriel, January 10, 1931; and one from Cachoeira Caran- 
guejo, Rio Cauabury, October 24, 1930. 
HYPOCNEMOIDES MELANOPOGON OCCIDENTALIS Zimmer: Zimmer’s Antcreeper 
Hypocnemoides melanopogon occidenialis ZimMER, Amer. Mus. Nov., No. 538, 
1932, p. 21 (Puerto Indiana, Rio Amazonas, Peru). 
SPECIMENS COLLECTED 
lad. of, lim. @, 1 ad. 2, Brazil, Cucuhy, Rio Negro, February 3-4, 1930. 
lad. 2, Brazil, Rio Negro, October 4, 1930. 
lim. o, Brazil, Santa Isabel, Rio Negro, October 13, 1930. 
2 ad. ?, Brazil, Rio Cauabury, November 4-5, 1930. 
1 ad. o&, Brazil, mouth of Rio Maturacé, November 8, 1930, 
lad. 9,1 -, Brazil, Rio Maturacd, November 11, 1930. 
2 ad. o, 1 ad. 9, Brazil, Salto do Hud, Rio Maturacdé, Venezuelan border, 
November 20-24, 1930. 
lad. 9, Brazil, Sio Gabriel, Rio Negro, January 19, 1931. 
lad. 9, Venezuela, Rio Negro Islands, January 27, 1931. 
lad. o, lad. 9, Venezuela, Brazo Casiquiare, Chapazon, January 31, 1931. 
1 ad. &, Venezuela, Brazo Casiquiare, mouth of Cafio Atamoni, February 6, 
1931. 
2 ad. o, 1 ad. 2, Venezuela, Brazo Casiquiare, Playa de Candela, February 
8-10, 1981. 
2 ad. o, Venezuela, Brazo Casiquiare, below mouth of Rio Pacila, February 
11-13, 1931. 
