432 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



paler (and usually more grayish) on forehead, and passing into 

 cinnamon-brown or russet on upper tail-coverts and middle rectrices ; 

 primaries, etc., as in adult male, but distal secondaries edged with 

 pale grayish brown instead of bluish gray; wing-spots chestnut or 

 bay (instead of black), the larger ones margined posteriorly by pale 

 cinnamon-buff or whitish; foreneck and chest light drab to dull 

 tawny-oHve, passing into white on chin and upper tlu-oat and into 

 very pale gray, tinged with pale buffy brown, on lower breast, etc., 

 the under tail-coverts russet or mikado brown (the shorter or more 

 anterior ones often more grayish or intermixed with gray); axillars 

 and under wing-coverts light bluish gray; length (skins), 186-214 

 (200); wing, 104-118 (110.9); tail, 71-80.5 (75.1); exposed culmen, 

 12.5-14.5 (13.8); tarsus, 16-22 (18.2); middle toe, 16.5-19.5 (18).« 



Young. — Similar to the adult female, but scapulars and wing- 

 coverts margined terminally with pale cinnamon or cinnamon-buff, 

 wing-spots smaller and indistinct, and feathers of foreneck and 

 chest with paler margins. 



Immature male. — Similar to the adult male, but with admixture of 

 grayish brown feathers (of young plumage), especially on upper parts, 



« Twenty-three specimens. 



Notwithstanding the very extensive geographic range of this species, I am unable to 

 make out any variation of coloration or dimensions which can be correlated with 

 locality; in other words, the individual variation, which is considerable, seems to be 

 greater than the geographic variation. The few adult females seen from Mexico all 

 have the chest much less brown, or more grayish, than many of those from more 

 Bouthern localities, though among the latter are specimens which in this respect 

 exactly match the Mexican birds. 



