706 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



on auricular region gradually fading downward and passing into pale 

 grayish buffy on chin, throat, and chest, the remaining under parts 

 similar but more yellowish, especially on flanks, the abdomen and 

 under tail-coverts olive-whitish; bill and iris dark brown; legs. and 

 feet clear or dusky brown (in dried skins). 



Adult male in autumn and winter. — Similar to the spring and sum- 

 mer plumage but more decidedly olivaceous above, more olive-bufly 

 below. 



Adult female. — Similar to the adult male, but without the red cro-yn- 

 patch. 



Young., first plianage {sexes alike). — Similar to the adult female, but 

 upper parts browner (nearly hair brown), wing-bands tinged with 

 brownish buffj^, under parts less yellowish, and texture of plumage 

 more lax. 



Adult ma^e.— Length (skins'), 99-106 (102); wing, 56.6-61.5 (58.9); 

 tail, 40.5-45 (42.8); exposed culmen, 7-9.6 (8.6); tarsus, 18-20 (19); 

 middle toe, 9-10.5 (9.6)." 



Adult female.— Le\\gt\). (skins), 93-104 (100); wing, 54-58 (56.1); 

 tail, 40.5-44 (42.2); exposed culmen, 7.5-9.5 (8.7); tarsus, 17.5-19.5 

 (18.7); middle toe, 9-10 (9.4).« 



a Ten specimens from eastern United States. 



Specimens from different geographic areas compare in average measurements as 

 follows: 



Locality. 



MALES. 



Ten adult males from eastern United States 



Four adult males from interior of Alaska 



Ten adult males from Rocky Mountains (Wyoming to So- 

 nera and Chihuahua) 



Ten adult males from California 



FEMALES. 



Ten adult females from eastern United States 



Ten adult females from Rocky Mountains (Wyoming to 



Chihuahua and Sonora) 



Nine adult females from California 



Middle 

 toe. 



9.6 

 9 



9.1 

 9.3 



8.9 

 9.2 



Besides being larger, specimens from the Rocky Mountain district, especially 

 those from Chihuahua, are paler and grayer than those from othet portions of the 

 continent; but California examples are nearly as large and are quite as dark as those 

 from the East. It is possibly one or more subspecies may be made out, but with the 

 material examined I am not able to do so satisfactorily. (See Brewster, Bull. Mus. 

 Comp. Zool., xli, 1902, 208.) 



Since the above was written Mr. Joseph Grinnell has described a supposed new 

 form of this species breeding in the mountains of Southern California, which may or 

 may not be the same as these large gray Kocky Mountain birds; but I have not seen 

 specimens of Mr. Grinnell's bird {Regulua calendula cineraceus Grinnell, Condor, vi, 

 no. 1, Jan., 1904, 25; type from Mt. Wilson, Los Angeles Co., California, in coll. J. 

 Grinnell) , and therefore am not prepared to express a decided opinion as to its status. 



