518 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
lim. @&, lad. 9, 1 im. -, Venezuela, Ciudad Bolfvar, June 8-11, 1931. 
lad. &, Venezuela, Soledad, Anzodtegui, Juae 12, 1931. 
Zimmer (Amer. Mus. Nov., No. 1108, 1941, pp. 11-12) has pointed 
out that this species appears to breed in and about northern Argentina 
around the end of January and to spend the southern winter in the 
northern parts of South America, returning south in September and 
October. The dates of the present series fit in very nicely with the 
extensive data given in his account, and so, too, do the plumage 
conditions of the various specimens. None of the nine birds was 
found to have enlarged gonads, a further agreement with Zimmer’s 
account. 
ELAENIA CHIRIQUENSIS ALBIVERTEX Pelzeln: White-crowned Elaenia 
Elaenia albivertexr PELZELN, Zur Ornithologie Brasiliens, pt. 2, 1868, pp. 107, 177 
(Ypanema, Sao Paulo, Brazil). 
SPECIMENS COLLECTED 
1 ad. 9, Brazil, Sao Gabriel, Rio Negro, January 10, 1931. 
1 ad. o, Venezuela, Chapazon, right bank Brazo Casiquiare, January 31, 1931. 
The pale tips of the upper wing coverts are whiter and more pro- 
nounced in the male than in the female. 
This flycatcher has an exceedingly extensive range without local 
differentiation—from Paraguay, southern Brazil, and Bolivia to the 
Guianas and Venezuela, eastern Peru, and Colombia (except the 
southwestern part.) 
ELAENIA RUFICEPS Pelzeln: Rufous-crested Elaenia 
Elainea ruficeps PELZELN, Zur Ornithologie Brasiliens, pt. 2, 1868, pp. 108, 178 
(Borba, Rio Madeira). 
SPECIMENS COLLECTED 
1 ad. 9, Venezuela, Upper Orinoco, right bank opposite Corocoro Island, 
March 14, 1931. 
lim. o, Venezuela, Cerro Yapacana, Upper Orinoco, April 7, 1931. 
It is only recently that this flycatcher was found to occur as far 
west as southern Venezuela. Thus, Hellmayr (Catalogue of the birds 
of the Americas, pt. 5, 1927, p. 424) records it from the three Guianas 
and from northern Brazil (at Borba on the Rio Madeira). Zimmer 
(Amer. Mus. Nov., No. 1108, 1941, p. 15) has added Yavanari in the 
Rio Negro to the Brazilian part of the range and lists examples from 
the Casiquiare and from Mount Duida in Venezuela. The present 
two seem to be the most northwesterly examples of the species to 
-date. Both are in rather worn plumage. 
ELAENIA CANICEPS CINEREA Pelzeln: Gray Elaenia 
Elainea cinerea PELZELN, Zur Ornithologie Brasiliens, pt. 2, 1868, pp. 108, 180 
(Marabitanas, Rio Negro). 
