APHELOCOMA., 357 
e’. Sides of head uniform bright blue, like crown, ete.; 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. californica); superciliary streak very 
indistinct, or obsolete ; length (skin) about 11.50, wing 
5.40, tail 5.70, exposed culmen .95, tarsus 1.60. Zab. 
Eastern plateau of Mexico, north to western Texas. 
480.1. A. cyanotis Ripaw. Blue-eared Jay.’ 
6%. 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. Hab. Lower Rio Grande 
Valley, and southward. 
A. couchi (Barrp). Couch’s Jay.? 
ce. Tail more than 5.50. 
d'. Tail even, or very slightly rounded. 
Colors of A. couchi ; length 13.00, tail 7.00. Hab. “ Mexico.” 
A. ultramarina (Bonar.). Ultramarine Jay.’ 
a’. Tail decidedly rounded. 
é. 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). West a loose, frail structure of dry twigs 
and rootlets, built in small trees. Lggs 4-7, 1.19 < .88, 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 arizonz Ripaw. Arizona Jay. 
é. Colors much darker and brighter than in A. arizone, the back 
more or less strongly tinged with azure-blue (sometimes 
almost uniform with head, ete.); length about 11.50-13.00, 
wing 6.70-7.40 (7.06), tail 6.30-6.75 (6.58), culmen 1.00-1.98 
’ New species; type, No. 8465, U.S. Nat. Mus.; “ John Taylor, Esq., Mexico, Sept. 1836.” 
2 Cyanocitta coucht Bairp, B. N. Am. 1858, 585; ed. 1860, pl. 60, fig. 2, Aphelocoma couch SHARPE, Cat. 
B. Brit. Mus. iii, 1877, 116. 
3 Corvue ultramarinus Bonap., Jour. Ac. Nat. Sci. Phil. 8vo, iv. 1825, 387.° Aphelocoma ultramarina 
Suarps, Cat. B. Brit. Mus. iii. 1877, 115. 
