536 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
SPECIMENS COLLECTED 
lad. o, Venezuela, Chapazon, right bank Brazo Casiquiare, January 30, 1931. 
lad. 9, lim. &%,1im. 9, Venezuela, Cerro Yapacana, Upper Orinoco, April 
22-27, 1931. 
The immature bird is like the adults in plumage. 
No comparative material either of this form or of H. b. inornatus 
has been available for examination, but the specimens agree closely 
with Sclater’s colored figure (Ibis, 1881, pl. 11, fig. 1) and with 
descriptions. 
HYLOPHILUS OCHRACEICEPS FERRUGINEIFRONS Sciater: Rufous-fronted Hylophilus 
Hylophilus ferrugineifrons ScuaTER, Proc. Zool. Soc. London, 1862, p. 110 (Bogotd, 
Colombia). 
SPECIMENS COLLECTED 
1 ad. o', 1 ad. 9, Brazil, Cucuhy, Rio Negro, February 1-7, 1930. 
2 ad. o', 1 ad. 9, 1 im. 9, Brazil, Serra Imeri, Rio Maturac4, November 
29-December 6, 1930. : 
2ad. o, lim. o&, Brazil, Rio Maturacé, November 9-12, 1930. 
2ad. #,1im. 9, Brazil, Salto do Hud, Rio Maturacd, November 18-20, 1930. 
1 ad. o, Brazil, Rio Cauabury, above mouth of Rio J4, November 5, 1930. 
1 ad. o&, Venezuela, Chapazon, right bank of Brazo Casiquiare, January 30, 
1931. 
lad. o&, Venezuela, Brazo Casiquiare, below mouth of Rio Pacila, February 11, 
1931. 
1 ad. o’, Venezuela, Cerro Yapacana, Upper Orinoco, April 21, 1931. 
Zimmer (Amer. Mus. Noy., No. 1160, 1942, p. 5) found in his 
series that the specimens from the Rio Negro, Brazil, showed the 
greatest “extreme of positive brown coloration on the back and 
of deep rufescence on the anterior part of the head...” The 
present series, differing from Zimmer’s material in being a north- 
south instead of an east-west section of the range of the race, shows 
no greater development of these characters in Rio Negro birds than 
in others from southern Venezuela. In fact, the 16 birds collected 
by the expedition show remarkably little variation. 
HYLOPHILUS SEMICINEREUS VIRiIDICEPS (Todd): Green-headed Hylophilus 
Pachysylvia semicinerea viridiceps Topp, Proc. Biol. Soc. Washington, vol. 42’ 
1929, p. 191 (Pied Saut, French Guiana), 
SPECIMEN COLLECTED 
1 ad. 9, Brazil, Santa Isabel, Rio Negro, October 17, 1980. 
This specimen is in fairly fresh plumage; it is definitely referable to 
viridiceps and shows no variaticn in the direction of guruanus Gylden- 
stolpe. 
This race occurs from French Guiana west to southern Venezuela 
(the Mount Duida region) south to the north bank of the Amazon. 
