164 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



aloii^- shaft for a considorable distance, the second rectrix with a sim- 

 ilar but nuich snudler white tip; axillars pale brownish ^ray; under 

 wniti;-coverts mixed pale brownish gray and dull white ; under surface 

 of remiges showino- an oblicpie basal and subbasal band of buff or 

 ochraceous-l)uif ; bill, legs, and feet, black; iris, brown. 



Young. — Wings (except coverts) and tail as in adults, but colora- 

 tion of head and body very different; pileuin, hindneck, back, scapu- 

 lars, rump, upper tail-coverts, and lesser and middle wing-coverts 

 conspicuously spotted with buff, each feather having a single spot of 

 this color, approximately rhomboid or cordate in shape, the feathers 

 broadly margined with blackish, causing a somewhat scpiamate effect; 

 under ])arts jiale buff or grayish buff, the feathers margined with 

 black or sooty. 



Adult /m//k— Length (skins), 195-207 (202); wing, 112.5-123 

 (117.3); tail, 95-109.5 (103.3); exposed culmen, 12-13 (12.4); tar- 

 sus, 20-22 (20.7); middle toe, 15-16.5 (15.5).« 



Adult female.— J^ength (skins), 187-204 (190); wing, 110.5-115.5 

 (113.6); tail, 95-105 (97.5); exposed culmen, 11-12.5 (11.8); tarsus, 

 19.5-21 (20.4); middle toe, 14.5-16 (15.2).'' 



Mountain districts of western North America; breeding (in pine 

 forests) from northwestern Mexico, in States of Zacatecas'^ (Sierra 

 Madre), Durango (El wSalto), Coahuila (Sierra Guadalu])e, April 21), 

 Chihuahua (Colonia Garcia; Pacheco; Sierra ]\ladre, near Guadalupe 



" Twenty-two specimens. 



^ Twelve specimens. 



Average measurements according to geographic area are as I'ollnws: 



Lofulity. 



MALES. 



Eight adult males Troni California, Oregon, etc 



Eight adult males from Rocky Mountain district 



One adult male from Yukon River 



Six adult males (breeding) from Chihuahua and Durango. 



Wing. 



11G.7 

 117.4 



113 

 117. it 



Tail. 



FEM.\LES. 



I'our adult females from California, etc U 1.(3 



Five adult females from Rocky Mountain district 1 12. !• 



Two adul t females from Yukon River HI..') 



Three adult females from Chihuahua and Coahuila i 113.8 



101.1 

 102. 1 

 'JO 

 104 



97.5 

 97.1 

 98 

 98.3 



Ex- ' 



posed Tarsus.' Middle 

 culmen. i ' toe. 



12.6 

 12.2 

 12 

 12.6 



11.0 

 11. S 

 11.7 

 12 



20.7 

 20. S 

 20 

 20.4 



20.6 

 20. .5 

 20. .5 

 20.2 



l.xO 

 15.7 

 10 

 1.').2 



IT). 4 

 If) 

 16 

 1.").2 



' In a large series of specimens (including many not represented in Ihe al)ove meas- 

 urements) I am not able to make out satisfactorily any geographic variation. The 

 specimens from Chihuahua, Durango, and Zacatecas, however, have the ochraceous- 

 Iniff band across under surface of remiges deeper in color, and the general coloration 

 ^^eems slightly darker and browner. 



cA still more southern locality (Sierra de Bolafios, Jalisco) is cited by Salviii and 

 Godman (Ibis, 1889, 381), Init the date at which specimens were obtained is not given. 



