APUKLOCOMA. 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 lail-eoverts ; back and bcapuhxis 



dark slaty gray, strongly tinged with blue. 



Adult: Chest light grayish blue, broadly streaked with 



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



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



5.40, tail 5.70, exposed culmeu .95, tarsus l.CO. JLiti. 



Eastern plateau of Mexico, north to western Texas. 



480. 1. A. cyanotis Ridgw. Blue-eared Jay.' 

 b'. Tail shorter than wings. 

 (J. 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), culmeu 1.05-1.10, tarsus 1.60. Hub. Lower Eio Grande 

 Vailej-, and soutliward. 



A. couchi (15.iiRO). Couch's Jay.' 

 c*. Tail more than 5.50. 



d'. Tail even, or very slightly rounded. 



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

 A. ultraraarina (Bonap.). Ultramarine Jay.' 

 d'. Tail decidedly rounded. 



e'. 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 C.10-6.50 (6 34), tail 5.65-6.10 

 (5.80), graduated for .50-.60, culmcn 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 4-7, 1.19 X -88, ]ilain 

 greenish blue, verj- similar in color to those of the Eobin 

 (Alcrula migratoria). Ilab. Northwestern Mexico, and con- 

 tiguous portions of Arizona and New Mexico. 



482. A. sieberii arizonae Eidgw. Arizona Jay. 



e*. Colors much darker and brigliter than in A. an'^omv, 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 



> New species; tvpc, Xo. S46a, U.S. Nat. Mus. ; "John Taylor, Esq., Mexico, Pcpt, 18S6." 



» Ci/anocilla couclii Baird, B. JT. Am. 1858, S88 ; cd. 1860, pi. CO, fig. 2. Aphclocoma couchi SlIARrn, C;.t. 



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



' Oirciii utlrnmniiiiif BoiJAP., Jour. Ac. Nat. Soi. Phil. Svo, iv. lS2j, 387, Aphclocoma ullraman'na 



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



