BIRDS OF NORTH AND MIDDLE AMERICA. 185 
Differing from A. e. griseigularis Ridgway ¢ of northwestern Colombia 
in much less grayish underparts (especially throat and chest), darker 
coloration of upper parts, and larger size. 
Adults (sexes alike).—Forehead and crown, together with entire’ 
loral, orbital, superciliary, supra-auricular, and auricular regions and 
anterior half or more of malar region bright cinnamon-rufous, the 
supra-auricular region sometimes paler, forming a more or less dis- 
tinct postocular streak; nape, hindneck, back, scapulars, rump, and 
upper tail-coverts plain olive-brown (between sepia and raw umber), 
the nape and hindneck sometimes duller; tail and wings cinnamon- 
rufous, this passing into brown on terminal portion of remiges and on 
tertials, the primary coverts tipped with more grayish brown; under- 
parts light olive or buffy olive, passing into dull whitish on upper 
throat and chin, inclining to raw umber on flanks, the abdomen 
sometimes tinged with tawny; under wing-coverts deep ochraceous- 
buff, the inner webs of remiges broadly edged with deep pinkish buff; 
maxilla blackish brown, mandible pale brownish (in dried skins) 
darker terminally; legs and feet horn color (in dried skins). 
Young.—Pileum and hindneck olive-brown, nearly concolor with 
back, etc.; sides of head similar, relieved by a more dusky broad 
streak occupying upper portion of auricular region and a paler super- 
ciliary or supra-auricular streak, the latter sometimes rufous-tawny, 
the lower portion of auricular region, suborbital region, and malar 
region also sometimes rufous-tawny or suffused with that color; 
coloration otherwise essentially as in adults, but underparts tinged 
with ochraceous, or sometimes with indistinct narrow bars of dusky. 
Adult male—Length (skins), 140-153 (146); wing, 64-72 (66.8); 
tail, 66.5-75.5 (71.5); culmen, 12-14.5 (13.4); tarsus, 18-19.5 (18.6); 
middle toe, 13-14.5 (13.7).? 
Adult female.—Length (skins), 136-162 (146) ; wing, 62-69.5 (65.8); 
tail, 63-75 (70); culmen, 12.5-14 (13.4); tarsus, 18-19 (18.6); middle 
toe, 18-14.5 (13.6).° 
@See p. 184. 
b Nineteen specimens. 
¢ Twelve specimens. 
Locality. Wing. | Tail. | CU |rarsus,| Middle 
MALES. 
Ten adult males from Costa Rica..........2-.22--20--eeeeeeeee 66.7 71.8 13.1 18.7 13.8 
Nine adult males from western Panam4(Chiriqui)............. 66.8 71.5 13.4 18.6 13.7 
One adult male (A. e. erythrops?) from northwestern Colombia.-| 65.7 62.7 13.2 18 14 
FEMALES, 
Eight adult females from Costa Rica.........00e. Pac sdseaeaases 65. 2 70.7 13.2 18.6 13.6 
Four adult females from western Panam&(Chiriquf)........... 66.9] 687] 13.8] 18.6 13.6 
