284 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



inner toe a little shorter; hallux about as long as lateral toes, much 

 stouter, its claw shorter than the digit and strongly curved. 



Coloration. — Uniform bluish gray or grayish blue (more decidedly 

 blue on head), the throat streaked with white. 



Nidification. — Nest essentially similar in form and composition to 

 that of Nucifraga, but in open pinon woods of arid districts, instead 

 of moister pine and fir forests. Eggs similar to those of Nucifraga. 



Range. — Western United States, in mountains. (Monotypic.) 



CYANOCEPHALUS CYANOCEPHALUS (Maximilian). 

 PrSON JAY. 



Adult male. — General color uniform dull grayish blue, paler on 

 posterior under parts, deepening on pileum, hindneck and auricular 

 region into a much darker and more purplish blue, the malar and sub- 

 orbital regions brighter blue (almost azure blue); chin, throat, and 

 median portion of chest broadly streaked with grayish white; anal 

 region very pale bluish gray or grayish white; bill, legs, and feet 

 black; iris brown. 



Adult female. — Similar to the adult male, but averaging decidedly 

 smaller and usually much duller in color, the prevailing color bluish 

 gray rather than grayish blue. 



Young. — Similar to the adult female, but still duller, without any 

 blue except on wings and tail; color of pileum, hindneck, back, etc., 

 plain gray, darker on the first; under parts entirely uniform pale 

 gray, becoming grayish white on anal region. 



AdMlt male.— Length (skins), 259-287.5 (272.5); wing, 148-159.5 

 (154); tail, 104-116.5 (114); exposed culmen, 33.5-37.5 (36); depth of 

 bill at nostrils, 9-10 (9.5); tarsus, 37.5-38.5 (88); middle toe, 22.6-23 

 (23).« 



Adult female.— Length (skins), 244-267 (254.5); wing, 142-147 

 (144.5); tail, 101-108 (104); exposed culmen, 31-32.5 (31.5); depth of 

 bill at nostrils 8; tarsus, 34-36.5 (35.5); middle toe, 18-20.5 (19.5).'' 



Pinon and juniper woods of western United States; north to south- 

 ern British Columbia (interior), Idaho, etc., south to northern Lower 

 California (San Pedro Martir Mountains), Arizona, New Mexico, and 

 western Texas; east to eastern side of Rocky Mountains, in winter 

 (sometimes regularly) to Nebraska (Long Pine, Cherry County, Sioux 

 County, Fullerton, Nance County, near Fort Kobinson, etc.), casually 

 to eastern Kansas (Lawrence). 



Gymnorhinus cyanocephalus Maximilian, Reise in Nord-amerika, ii, 1841, 21 



(upper Missouri River). 

 lOymnoUtta] cyanocephalus Boa aparie, Oonsp. Av., i, 1850, 382. — Codes, Key N. 

 Am. Birds, 1872, 163. 



« Five specimens. >> Four specimens. 



