444 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
doubt as to the validity of C. g. undulatus Todd of the Rio Caura, 
Venezuela. This form, described from a single female, is said to differ 
from the nominate race in being smaller (wing 117, tail 68, bill 21 mm.), 
in having the barring of the upperparts and underparts much reduced, 
and in having the rump, flanks, inner webs of the remiges, and under 
wing coverts more yellowish (the rump between yellow-ochre and 
primuline yellow, the under wing coverts mustard yellow, and the 
inner webs of the remiges Naples yellow). One of the males from 
Cerro Yapacana has the barring of the upperparts and underparts 
noticeably reduced, especially above; while two of the females from 
the same locality show a divergence in the color of the under wing 
coverts and inner margins of the remiges that almost bespeaks dichro- 
matism. In one of them these parts are exactly as in the description 
of the type of undulatus, while in the other they are much duskier and 
more olive—between yellow-ochre and old gold. In the former 
example the rump is more yellowish than in the latter, but not quite 
so light as in the description of undulatus. However, in the specimen 
with these critical areas most like wndulatus the blackish barring is very’ 
strongly developed both above and below, and the birds are larger 
than undulatus (wing 125.1-125.2; tail 74—74.1; culmen from base 
22.2-24 mm.), but in view of the variability in coloration and of the 
meagre material of undulatus it seems that the status of the latter is at 
least uncertain. 
Some of the March and April examples were noted as being in 
breeding condition when collected. The October 26 specimen from 
the Rio Cauabury, Brazil, is in extremely worn plumage, quite the 
reverse of the one taken five days earlier on the Rio Negro. The 
latter bird has the rump much more yellowish or olive ocher than the 
former. The Orinoco birds have the feathers of the crown and crest 
uniformly rufous with no blackish medial streaks, while the Brazilian 
birds have blackish shaft streaks in these feathers. The unstreaked 
head condition in south Venezuelan birds has been noted by previous 
students, notably by Hellmayr (Nov. Zool., 1907, p. 80). It appar- 
ently means nothing very significant however, as Hellmayr found 
these streaks present in one and absent in another female from the 
Rio Madeira (Calana and Alliana; Nov. Zool., 1910, p. 384). Berl- 
epsch and Hartert (Nov. Zool., 1902, p. 94) write that birds from the 
Orinoco, north of our present area (Munduapo and Nericagua), have 
shorter bills than in others from upper Amazonia and that males 
from the Orinoco have shorter wings and tails as well. If we may 
look upon Rio Cauabury birds as similar to upper Amazonian ones, 
this distinction does not hold. 
CROCOMORPHUS FLAVUS FLAVUS (P. L. 8. Miiller): Chestnut-winged Yellow Woodpecker 
Picus flavus P. L. 8S. Miuunr, Natursystem, Suppl., 1776, p. 91 (Cayenne). 
