APHELOCOMA. 357 



e\ 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 ; hack 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. Sab. 



" Mexico" (locality unknown). 



A. cyanotis Eidgw. Blue-eared Jay. 1 

 b 2 . Tail shorter than wings. 

 c\ 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. Sab. Lower Eio Grande 

 Valley, and southward. 



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

 c 2 . Tail more than 5.50. 



d 1 . Tail even, or very slightly rounded. 



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

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

 d 2 . 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 (6 34), 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 Eobin 

 (Merula migratoria). Sab. Northwestern Mexico, and con- 

 tiguous portions of Arizona and New Mexico. 



482. A. sieberii arizonse Eidgw. Arizona Jay. 



e*. Colors much darker and brighter than in A. arizonm, 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." 



2 Cyanocitta couchi Baird, B. N. Am. 1858, 588 ; ed. I860, pi. 60, fig. 2. Aphelocoma couchi Sharpe, Cat. 

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



3 Corvus ultraiitarinua Bonap., Jour. Ac. Nat. Sci. Phil. 8vo, iv. 1825, 387. Aphelocoma ultramarina 

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



