210 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
rather broadly streaked with light yellowish buff or buff-yellow; chin 
and upper throat immaculate yellowish buff or buff-yellow; rest of 
under parts light raw-umber brown (darker on lower throat and upper 
chest, passing posteriorly into a more tawny-olive hue on flanks and 
a more rufescent hue on under tail-coverts), narrowly streaked with 
pale yellowish buff, these streaks broader on chest and lower throat, 
sometimes obsolete on flanks and under tail-coverts; under wing- 
coverts and broad edgings to inner webs of remiges ochraceous-buff; 
bill dusky horn color, the gonys (broadly) whitish or pale yellowish 
horn color (in dried skins); iris brown; legs and feet horn color (in 
dried skins). 
Young.—Upper parts essentially as in adults but color of pileum 
and hindneck more dusky, the latter with streaks rufescent instead 
of buffy yellowish; a more or less distinct narrow superciliary stripe 
of tawny; malar region (except anterior portion), sides of neck, 
chin, throat, and chest, tawny-ochraceous, tawny, or rufous-tawny 
(deepest on chest, paler on chin), the feathers with narrow and 
indistinct shaft-streaks of paler; rest of under parts similar medially 
in color to throat and chest but paler and duller, passing into a more 
olive hue on sides and flanks, the under tail-coverts more rufescent; 
under wing-coverts tawny or tawny-ochraceous, the inner webs of 
remiges broadly edged with ochraceous-buff; bill, etc., as in adults, 
or with mandible wholly dusky. 
Adult male.—Length (skins), 178-195 (186); wing, 89-94 (91.9); 
tail, 78-86 (82.5); culmen, 18.5-20 (19.3); tarsus, 22-24 (22.9); 
middle toe, 17-19 (17.8).¢ 
Adult female.—Length (skins), 172-187 (182); wing, 81.5-92 (87.2); 
tail, 73.5-83 (79.6); culmen, 19-21 (20); tarsus, 21.5-23.5 (22.6); 
middle toe, 17-18.5 (17.6).® 
@ Eleven specimens. b Nine specimens. 
Locality. Wing. | Tail. oe Tarsus. miaaie 
MALES. 
Nine adult males from Costa Rica........... 22sec e eee ee eee 91.6 83.2 19.4 22.9 17.7 
Two adult males from western Panamé (Chiriquf)............. 93 78.5 19.5 22.7 18.2 
Two adult males (X. s. subalaris) from northwestern Colombia.| 89.7 80 19.2 22 17.7 
One adult male (X. s. subalaris) from western Ecuad6r........ 86.5 70.5 19 23.5 20 
FEMALES. 
Seven adult females from Costa Rica............-.2.2.222-- sees 86.8 78.9 20.1 22.4 17.6 
Two adult females from western Panama (Chiriquf)........... 88.5 81.7 19.7 23 17.5 
