380 |. PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
SPECIMEN COLLECTED 
1 ad. 2, Brazil, Rio Cauabury, above Cachoeira, Panela de Onca, November 
1, 1930. 
The Rio Negro tinamou differs from the Zulia race in having the 
upperparts somewhat darker, more brownish, less olivaceous, and on 
the average less heavily barred, the top of the head slightly duller, 
less brightly rufescent, but with the rufescent tone extending down- 
ward more on the cheeks and auriculars, and, even in pale-bellied 
individuals, with the ventral ground color more buffy, less whitish. 
The present example is one of the northernmost records for the 
subspecies. The known range of this tinamou extends from the 
Rio Negro south to the north bank of the Solimées, and west to the 
Lower Rio Ica. 
TINAMUS GUTTATUS Pelzeln: White-throated Tinamou 
Tinamus guttatus (Natterer, MS.) Peuzrexn, Verh. zool.-bot. Ges. Wien, vol. 13, 
1863, pp. 1126, 1128 (Borba, Rio Madeira, Brazil; designated by Hellmayr, 
Nov. Zool., vol. 14, 1907, p. 409). 
SPECIMENS COLLECTED 
1 ad. 9, Brazil, Salto do Hud, Rio Maturacé, November 24, 1930. 
2 ad. o, Brazil, Serra Imeri, near Salto do Hud, December 1-4, 1930. 
3 ad. co’, 1 ad. 9, Venezuela, Cerro Yapacana, Upper Orinoco, March 28- 
April 25, 1931. 
At first glance it seems that the Brazilian birds might prove to be 
separable from the Venezuelan ones, as the former are darker, more 
ochraceous-tawny on the throat and breast than are the latter. How- 
ever, one of the four Venezuelan birds agrees in this respect with the 
Brazilian specimens, so for the present, and in the absence of com- 
parative series, especially of topotypical guttatus, it seems advisable 
to keep them all under one name. Furthermore, as indicative of the 
variability of this character, it may be noted that Hellmayr (Nov. 
Zool., vol. 14, 1907, p. 409) describes birds from the Rio Madeira as 
having the underparts “‘rather pale brownish buff, almost white along 
the middle of the abdomen ...’’ Also, Hellmayr and Conover 
(Catalogue of the birds of the Americas, pt. 1, No. 1, 1942, p. 23, 
footnote) write that birds from the Upper Rio Negro appear to be 
inseparable from those from south of the Amazon. 
The Cerro Yapacana specimens were noted as having enlarged, 
active gonads when collected. 
No Peruvian specimens have been seen; Salvadori (Catalogue of 
the birds in the collection of the British Museum, pt. 27, 1895, p. 508) 
noted that birds from Peru have the upperparts with scarcely any 
blackish bars, and the whitish-buff spots on the wings larger and less 
numerous than Brazilian ones. 
