662 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



blackish brown, about equal in width to the ochraceous or buffy 

 interspaces on middle rectrices but becoming narrower on outer ones, 

 the ocliraceous or buffy interspace on the former enclosing central 

 transverse spots of dusky, the terminal ochraceous or buffy band 

 broadest on all the rectrices; "Eyebrows" (superciliary region), lores, 

 chin, and throat dull white, the loral bristles with black shafts ; face 

 dingy ochraceous-white or dull buffy white exteriorly, the eyes 

 broadly encircled with black ; facial rim minutely speckled with pale 

 ochraceous or buffy and blackish, except immediately behind ear, 

 where uniform blackish ; under wing-coverts immaculate pale buff to 

 white, the terminal half of under primary coverts plain blackish 

 brown (forming a conspicuous spot) ; under surface of primaries for 

 greater part immaculate buffy white, but terminal portion, and, pre- 

 ceding this, one or two very broad bands, dusky; bill blackish; iris 

 bright lemon yellow. 



Young. — Above dark sooty brown, the feathers broadly tipped 

 with ochraceous-buff; face uniform brownish black; under parts 

 wholly plain pale dull ocliraceous or buffy, tinged anteriorly with 

 smoky grayish. 



Adult male. —Length (skms), 325-400 (357); wing, 298-330 (312.9); 

 tail, 136.5-161.5 (148.3); culmen, from cere, 15.5-20 (17.2).« 



Adultfemale.— Length (skins), 340-392 (371); wmg, 300-326 (312); 

 tail, 142-158.5 (152); culmen, from cere, 16.5-19.5 (17.7).^ 



o Twenty-three specimens. 



6 Sixteen specimens. 



Locality. 



MALES. 



Three adult males from western Europe 



Four adult males from eastern Asia 



Five adult males from eastern United States 



Two adult males from western United States 



Four adult males from Alaska 



Five adult males from southern South America 



One adult male from Porto Rico (A . portoricensis) 



Three adult males from Galapagos Islands (A . galapagoensis) . 



Three adult females from western Europe 



Seven adult females from eastern North America 



Three adult females from Alaska 



One adult female from Clarion Island, off w. Mexico 



Two adult females from southern South America 



One adult female from Galapagos Islands (^4 . galapagoensis) . 



Wing. 



304 



311 



310.8 



307 



312.5 



314.6 



2S2.7 



308.7 



308 



313.3 



324 



323.5 



288 



With a fairly good series of specimens (though insufficient in number of European 

 examples), I am not able to make out any constant differences between American 

 and Old World birds of this species. It is possible, however, that a larger series might 

 produce a different impression. 



