BIRDS OF NORTH AND MIDDLE AMERICA. 



117 



PLANESTICUS GRAYI GRAYI (Bonaparte). 

 GRAYS THRUSH. 



Adult (sexes alike). — Above plain ochraceous-olive or buffy olive, 

 the tail and wings (in part at least) duller or grayer (the former more 

 olivaceous hair brown) ; chin and throat pale buff (sometimes approach- 

 ing buffy white on chin) , streaked with olive ; rest of under parts dull 

 brownish buff or clay color, duller (approaching wood brown or 

 isabella color) on chest, deeper (deep clay color or cinnamon-buff) on 

 flanks, purer buff on under tail-coverts and abdomen; axillars and 

 under wing-coverts clear ochraceous-buff or light ochraceous, the 

 inner webs of remiges (except terminally) broadly edged with pinkish 

 buff; bill horn color (in dried skins) w^ith paler tomia; legs and feet 

 brownish or horn color (in dried skins). 



Young. — Much like adults in general coloration, but scapulars and 

 interscapulars with more or less distinct shaft-streaks of pale ochra- 

 creous or buffy, wing-coverts tipped with a triangular spot of ochraceous 

 or ochraceous-buff, superciliary region minutely flecked with buffy 

 brighter, more ochraceous, thickly spotted (transversely), except on 

 throat, abdomen, and under tail-coverts, with grayish dusky. 



Adult male.— hength (skins), 220-244 (23f); wing, If 6-132.5 

 (125.2); tail, 95-109.5 (102) ; exposed culmen, 18.5-23 (21.1) ; tarsus, 

 28-33.5 (31.5); middle toe, 20-22 (21.2).« 



Adult female.— Length (skins), 216-238 (226) ; wing, 110-130.5 

 (120.8); tail, 91-104 (98.3) ; exposed culmen, 19.5-22.5 (20.9); tarsus, 

 29.5-33 (31.8); middle toe, 20-22.5 (20.9).^ 



a Twenty-five specimens. 

 b Twelve specimens. 



Specimens from different geographic areas compare in average measurements as 

 follows: 



While considerable variation in coloration, as well as dimensions, is observable in 

 the large series of specimens examined, I am unable to discover any correlation between 

 these variations and geographic area. 



