426 PROCEEDINGS OF THE NATIONAL MUSEUM — VOL. 97 
1 “‘ad.”” o& (=subadult), Venezuela, Brazo Casiquiare below mouth of Rio 
Pacila, February 12, 1931. 
1 ad. o&, Venezuela, Cerro Yapacana, Upper Orinoco, March 18, 1931. 
The literature of this species is confusing because of the divergent 
nomenclatural usages employed. The nomenclature here used is, that 
adopted by Zimmer (Publ. Field Mus., Nat. Hist., Zool. Ser., vol. 17, 
1930, p. 295-6) and Todd (Proc. Biol. Soc. Washington, vol. 56, 1943, 
p. 9) and not that of Hellmayr, Griscom and Greenway, Pinto, and 
others. 
The male, although labeled as an adult, still has the cheeks, chin, 
throat, and breast as in the female plumage and is obviously a subadult 
bird. 
One of the females has the outer rectrices much more abundantly 
barred, i. e., the white interspaces between the black bars narrower 
than the others. If they were not all from the same locality one 
would be inclined to see in it a possible racial character, as it is just the 
sort of variation that is so often subspecific. 
The adult male collected on March 18 was in breeding condition 
when shot. 
TROGON STRIGILATUS STRIGILATUS Linnaeus: Green-backed Trogon 
Trogon strigilatus LINNAEUs, Systema naturae, ed. 12, 1766, p. 167 (Cayenne). 
SPECIMENS COLLECTED 
1 ad. o, Brazil, Santa Isabel, Rio Negro, October 11, 1930. 
lim. &, Brazil, Rio Negro at mouth of Rio Cauabury, October 22, 1930. 
lad. 9, Brazil, Rio Maturacd, November 12, 1930. 
1 ad. o’, Brazil, Sio Gabriel, Rio Negro, January 16, 1931. 
1 im. 9, Venezuela, Brazo Casiquiare, Raudal Corocoro, below Playa de 
Candela, February 9, 1931. 
1 ad. 9, Venezuela, Brazo Casiquiare, below mouth of Rio Pacila, February 
13, 1931. 
2ad. #, lim. #, lad. 9, Venezuela, San Antonio, Upper Orinoco, February 
28—March 2, 1931. 
1 ad. &, 1 ad. 9, Venezuela, Upper Orinoco, right bank opposite Corocoro 
Island, March 13-15, 1931. 
Sad. #,2im. #,3ad. 9,1lim. 9, Venezuela, Cerro Yapacana, Upper Orinoco, 
March 19—April 27, 1931. 
lad. #, lad. 9,1im. 9, Venezuela, Puerto Ayacucho, Rio Orinoco, January 
2, 1930, and May 11-13, 1931. 
Some of the February, March, and April birds were noted as being 
in breeding condition when collected. Signs of molt are to be found 
in birds collected in October and February. 
This appears to be the commonest and most ubiquitously distributed 
of the trogons in the areas covered by the expedition. 
A specimen taken on the Brazo Casiquiare below the Rio Pacila, 
February 13, was preserved in alcohol. 
