26 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
yellowish white, usually flecked, more or less, with dusky; inner webs 
of remiges broadly edged (except terminally) with yellowish white; 
bill black; iris brown; legs and feet dusky (plumbeous in life); 
length (skins), 150-167 (157); wing, 72-80 (74.9); tail, 62-71 (67.5); 
culmen, 20-22.5 (21.4); tarsus, 21-23.5 (22.4); middle toe, 13.5-14.5 
(13.9).2 
Adult female.—Head and neck black narrowly streaked with white, 
the streaks much broader (sometimes spot-like) on chin and throat; 
back, scapulars, rump, and upper tail-coverts plain sepia brown to 
slaty brown, the feathers of back slightly darker centrally; wings and 
tail darker (the tail brownish black or blackish brown), all, or nearly all, 
the wing-coverts marked with a small roundish or triangular terminal 
spot of white; under parts, posterior to throat or upper chest, varying 
from nearly slate-gray to olive-drab, the pectoral region streaked 
with white; under tail-coverts deeper brown, narrowly streaked 
(sometimes also somewhat spotted) with white; under wing-coverts 
and broad edgings to inner webs of remiges yellowish white or pale 
creamy yellow; maxilla black, mandible paler (plumbeous in life); 
iris dark brown or brownish gray; legs and feet plumbeous; length 
(skins), 148-166 (157); wing, 70-77 (72.9); tail, 60-70.5 (66.7); 
culmen, 19.5-22 (20.7); tarsus, 21-23.5 (22.4); middle toe, 13-15 
(14).2 : 
Young male (first plumage).—Similar to the adult male but texture 
of plumage much softer, black of back, etc., duller, and chest with 
narrow shaft-streaks of white. 
Young female (first plumage).—Similar to adult female but duller 
in color, with black of head and neck replaced by dark sooty brown 
above and paler sooty brown below, and streaks much less distinct, 
those on pileum pale brownish or tinged with brown, instead of pure 
white, those of pectoral area broader but much less distinct and also 
suffused with pale brownish. 
Southwestern Costa Rica (Pozo Azil de Pirris; Pozo del Pital, 
Rio Naranjo; El Pozo de Térraba; Trojas de Rio Grande; El 
@ Nineteen specimens. » Highteen specimens. 
Locality. wing. | am, | Pee | Ea | Miaille 
MALES. 
Ten adult males from Costa Rica............-.---.0.-ee eee e eee 75.8 68. 6 21.3 22.1 13.9 
Nine adult males from western Panam4..........-.--.-2.--.++- 74 66.3] 21.6] 22.7 13.9 
FEMALES. 
Ten adult females from Costa Rica..............-.2-eseeeee eee 73.4 67.8 | 20.6 22.5 14.1 
Eight adult females from western Panam4...........--------.- 72.3] 65.3] 20.8] 22.2 13.9 
