NO. 9 BIRDS OF ISLA COIBA, PANAMA—WETMORE 55 
searching carefully through the leaves for food. I found them in 
such areas as the border of swampy woods near the lower Rio 
Catival, in the higher, unbroken forest inland, usually ranging from 
the undergrowth to the lower branches of the trees, and at the 
borders of thickets. I noted them also at berry-bearing trees, in 
company with honeycreepers and fruit-eating flycatchers and mana- 
kins. They were solitary in habit, and though apparently fairly 
common, they remained so closely under cover that it was difficult to 
see them. Their method of progression was by climbing through 
dense cover, rather than by hopping about in more open branches, a 
mode of travel for which their large, strong feet are eminently 
suited. In general, they resembled Cranioleuca erypthrops rufigenis 
of the mountain forests on the Volcan de Chiriqui. 
. The species is one that has not been found previously outside South 
America, where its more northern representatives range north only 
to the Orinoco Valley in southern Venezuela and southeastern Colom- 
bia, so that it is remarkable to find this colony on Coiba Island, where 
its presence has been wholly unsuspected. The Coiba birds represent 
a distinct race, which is described herewith. 
CRANIOLEUCA VULPINA DISSITA subsp. nov. 
Characters.—Similar to Cranioleuca vulpina alopecias (Pelzeln)1® 
but bill slightly heavier; no indistinct streaking on chest and fore- 
neck ; much brighter brown on lower surface. 
Description—U.S.N.M. No. 460809, male, Isla Coiba, Panama, 
collected Jan. 21, 1956, by A. Wetmore (orig. No. 20353): A few 
tiny feathers on forehead, immediately behind nostril, dull white on 
external webs, dark neutral gray on inner webs, producing a barely 
distinguishable mottling; pileum russet; hindneck, back, scapulars 
and wings, including coverts, between tawny and russet ; rump snuff 
brown ; tail russet ; lores dull white ; a very narrow superciliary pink- 
ish buff; sides of head dull cream-buff, with faint edgings of dusky 
neutral gray, producing slightly indicated streaks ; throat white ; sides 
of neck light chamois with a band of tawny along lower edge; breast 
and abdomen dull chamois; sides dull isabella color; flanks isabella 
color ; under tail coverts tawny ; edge of wing and under wing coverts 
cinnamon-buff, with edgings of tawny ; inner webs of primaries and 
secondaries dark mouse gray, edged widely toward the base with dull 
*® Synallaxis alopecias Pelzeln, Sitzungsb. Kon. Akad. Wiss. Wien, math.-nat. 
Cl., vol. 34, 1850, p. 101. (Forte do Sao Joaquim, Rio Branco, Brasil.) 
