284 NORTH AMERICAN BIRDS. 



Supercilinry streak .sliarjjly (li'liiuMl, eonMi)iciioiis. Wing, n.OO; 

 tail, 5.00; bill, 1.20 and .37; tarsus, l.f)r); iniildlo toe, .!)."). Winj;- 

 fonniila, 4, ."., (;, 7, 3, 8, 9, 2, 10; (ii-st, 2.10 shorter timii lonKost. 

 Gradnation of tail, 1.1a. Hub. I'ueilie I'rovinue ol' United .Slates ; 



Cape 8t. Luuiu>< \a\: cali/urnica. 



B. Tail not longer than win^,'s, or eonsiderahly shorter. No superciliary 

 .stripe, and no streaks on throat or jugnlmn. Auriuulars blue like the (.'rown. 



C. ultramariua. Lower parts whitish, conspicuously dilTerent (ioni the 

 upper. 



Tail nearly, or perjeclly even. 

 Length, 13.00; taiUi-en; bill. 1.50; tail, 7.00. /lab. Mexico. 



var. ultrumurina} 

 Length, 11.50; tail very slightly rounded (graduation, .25 onl^ ~ 

 bill, 1.28 and .35; tail, 50. Above bright blue, dorsal region 

 obscured slightly with .nshy ; beneath dull pale ash, becoming 

 gradually whitish posteriorly, the crissuni being pure ash. Lores 

 blue. Tarsus, 1.45 ; middle toe, .95. Wing-fornuila, 5, 4 =- (i, 7, 

 3, 8, 9, 10, 2 ; first, 2.10 shorter than long.'s*. Graduation of tail, 

 .25. Hab. Lower Rio Grande \&r. couchi. 



Tail considerably i-ounded. 



Colors as in cotidii, but dorsal region scarcely obscured by ashy. 



Lores black. Wing, 7.50; tail, 7.50; bill, 1.30 and .40; tarsus, 



l.GO; middle toe, .90. Wing-formula, 5, 4, 6, 3 = 7, 8, 9, 2; first, 



2.75, shorter than longest. Craduation of tail, 1.15. Hub. Mexico 



(Orizaba, Mirador, etc.) vw.sordida.^ 



Graduation of the colors as in sordkla, but the blue, instead of 

 being a bright ultramarine, is very much paler and duller, and with 

 a greenish east, the whole dorsal region decidedly ashy ; ash of the 

 pectoral region much paler, and throat similar, instead of decidedly 

 whitish, in contrast ; pure white of posterior lower parts covering 

 whole abdomen instead of being confined to cri.ssum. Wing, ().20; 

 tail, 5.70; bill, 1.30 and .40; tarsus, 1.50; middle toe, .97. Wing- 

 formula, fourth, fifth, and sixth equal; 7, 3, 8, 9, 2 ; first, 2.20, 

 shorter than longest. Graduation of tail, .50. Hab. Southern 

 Rocky Mountains (Fort Buchanan, and Copper Mines, Arizona). 



var. arizonce. 

 C. unioolor.' Lower parts bright blue, like the upper. Entirely 



ferifd to this race, but wliich differs in such an important respect from all other specimens of 

 tlie several r.ices referrihle to calif„niim, as ext.Mi.led, that it may belong to a distinct form. 

 Having the precise aspect of mmichmsti in regard to its upper plumage, it lacks, however, any 

 trac! of the blue edgings and pectoral collar, the whole lower parts being continuously uninter- 

 rupted (hill white, purer posteriorly. The appearance is sucli as to cause a suspicion that it may 

 be a link between sumichrasti and one of tlic races of uUramarina. It measures : wing, 5.50 ; 

 tail, 6.00 ; graduation of tail, .70. 



» Oyanocitta ultramarirm, (BoNAi-.) Stuickland. — Garrulus iiUranwrinus, Honap J A 

 N. S. IV, 1825, 386 (not of Audubon). 



■' Chjanocitta sordida, (Swains.) (not of Baihd, Birds N. Am., whicli is arizonm). -Sci.atkr, 

 Cat. Am. B. 1862, 143. Oarndus sirrdidus. Swains. Phil. Mag. 1827, i, 437. 



« OyamcUta unicolor, (Du Bus) Bonai-. Consp. p. 378. — Cyanocorax unicolor, Dv Bus. 

 Bull. Acad. Brux. XIV, pt. 2, p. 103. 



