APHELOCOMA. 357 



e 2 . Sides of head uniform bright blue, like crown, etc. ; breast 

 deep brownish gray, changing rather abruptly to pure 

 white on belly and lower tail-coverts ; back and scapulars 

 dark slaty gray, strongly tinged with blue. 



Adult : Chest light grayish blue, broadly streaked with 

 white (as in A. calif ornica) ; superciliary streak very 

 indistinct, or obsolete ; length (skin) about 11.50, wing 

 5.40, tail 5.70, exposed culmen .95, tarsus 1.60. Hab. 

 "Mexico" (locality unknown). 



A. cyanotis KIDGW. Blue-eared Jay. 1 

 6 2 . Tail shorter than wings. 

 c 1 . Tail 5.50, or less. 



Adult: Above bright light azure-blue, including whole side of 

 head, down to throat, the back and scapulars dull grayish blue, 

 or plumbeous ; chin and throat dull white, deepening into dull 

 light brownish gray on breast, this again fading into pure 

 white on lower belly and under tail-coverts ; length (fresh) 

 11.50, wing 5.80-5.90, tail 5.30-5.40 (graduated for only about 

 .30), culmen 1.05-1.10, tarsus 1.60. Hab. Lower Eio Grande 

 Valley, and southward. 



A. couchi (BAIRD). Couch's Jay. 2 

 e 2 . Tail more than 5.50. 



d 1 . Tail even, or very slightly rounded. 



Colors of A. couchi ; length 13.00, tail 7.00. Hab. " Mexico." 

 A. ultramarina (BONAP.). Ultramarine Jay. 3 

 d*. Tail decidedly rounded. 



e 1 . Colors of A. couchi, but rather paler above, the chest rather 

 more decidedly ashy, and throat more grayish ; length 

 about 11.50-13.00, wing 6.10-6.50 (634), tail 5.65-6.10 

 (5.80), graduated for .50-.60, culmen 1.00-1.08 (1.02), tarsus 

 1.58-1.66 (1.60). Nest a loose, frail structure of dry twigs 

 and rootlets, built in small trees. Eggs 2-5, 1.17 X -84, plain 

 greenish blue, very similar in color to those of the Robin 

 (Merula migratoria'). Hab. Northwestern Mexico, and con- 

 tiguous portions of Arizona and New Mexico. 



482. A. sieberii arizonae KIDGW. Arizona Jay. 



e 2 . Colors much darker and brighter than in A. arizonce, the back 



more or less strongly tinged with azure-blue (sometimes 



almost uniform with head, etc.) ; length about 11.50-13.00, 



wing 6.70-7.40 (7.06), tail 6.30-6.75 (6.58), culmen 1.00-1.08 



1 New species ; type, No. 8465, U. S. Nat. Mus. ; " John Taylor, Esq., Mexico, Sept. 1836." 



3 Cyanocitta couchi BAIRD, B. N. Am. 1858, 588 ; ed. 1860, pi. 60, fig. 2. Aphelocoma couchi SHARPE, Cat. 



B. Brit. Mus. iii. 1877, 116. 



3 Cormis ultramarinus BONAP., Jour. Ac. Nat. Sci. Phil. 8vo, iv. 1825, 387. Aphelocoma ultramarina 



SHARPE, Cat. B. Brit. Mus. iii. 1877, 115. 



