124 bulletin: museum of compakative zoology. 



Lucas), 305 (crit.; Cape St. Lucas). Cooper, Orn. Cal., 1870, 302, 303, part 

 (crit. ; Cape St. Lucas). Baird, Brewer, and Ridgwat, Hist. N. Amer. 

 Birds, II. 1874,288-290, part (crit.; Cape St. Lucas). 



[Cyanurus] californicus Gray, Hand-list, pt. II. 1870, 4, no. 6,092, part. 



[Aphelocoina Jloridana] var. californica Cooes, Key N. Amer. Birds, 1872, 166, part 

 (Pacif. coast). 



Aphelocoma Jloridana, var. californica Codes, Check List, 1873, 49, no. 236 b, part. 



Aphelocoina californica (not Garrulas californicus Vigors) Ridgway, Norn. N. Amer. 

 Birds (Bull. U. S. Nat. Mus., no. 21), 1881, 30, no. 293, part; Proc. U. S- 

 Nat. Mus., V. 1883, 511 (crit.; Lower Calif.). Belding, Ibid. (Cape 

 Region); VI. 1883, 348 (Victoria Mts.). A. O. U., Check List, 1886, 242, 

 243, no. 481, part. Salvin and Godman, Biol. Centr.-Amer., Aves, I. 1887, 

 493, part (Cape St. Lucas). 



Aphelocoma floridana californica Coues, Check List, 2d ed., 1882, 67, no. 356, part. 



A.[phelocoma'\ californica hi/poleuca Ridgway, Man. N. Amer. Birds, 1887, 356 

 (orig. descr., "based on many specimens from Cape St. Lucas, La Paz, and 

 contiguous localities "). 



Aphelocoma californica hi/poleiica, A. 0. U. Comm., Suppl. to Check List, 1889, 11 ; 

 Check List, abridged ed., 1889, and 2d ed., 1895, no. 481 a. Bryant, Proc. 

 Calif. Acad. Sci., 2d ser., II. 1889, 24 (descr. nest and eggs from San Ignacio), 

 293 (Cape Region and n. to 28°). Codes, Key N. Amer. Birds, 4th ed., 1894, 

 901 (descr. ; vicinity of Cape St. Lucas). Bendire, Life Hist. N. Amer. Birds, 

 pt. II. 1895, 378 (vicinity of Cape St. Lucas ; descr. eggs taken by Xantus 

 near Cape St. Lucas). , 



[Aphelocoma californica] var. hypoleuca Ddbois, Synop. Avium, fasc. VII. 1901, 512 

 ( Basse-Calif ornie). 



The characters enumerated by Mr. Ridgway are fairly well maintained in 

 the large series of specimens of Xantus's Jay collected by Mr. Frazar, although 

 none of them are quite constant. Asa rule, however, hypoleuca is considerably 

 smaller than californica, the bill is longer as well as stouter, the blue, espe- 

 cially on the wings and tail, is much lighter, and the under parts are whiter. 

 There is also usually more blue on the sides of the head, especially over the 

 auriculars. 



Individual variations : — The blue of the head varies greatly in shade, rang- 

 ing from marine blue to china blue. In some of the June specimens it is 

 entirely worn oflf most of the feathers of the head, excepting those on the fore- 

 head and sides of the crown, the remainder of the head above and on the sides 

 being plain brown. The blue of the wings and tail is much less variable than 

 that of the head. The brown of the back and scapulars is pale and grayish 

 in some birds, in others deep and rich with a tinge of sepia. A few specimens 

 have the scapulars and hind back strongly bluish : many show exceedingly 

 faint dusky bars on the tail, as well as sometimes on the wing coverts. 



Juvenal plumage: — Male (J^o. 16,528, Triunfo, June 27, 1887). Upper 

 parts, with the sides of the head and neck, plain, dull drab, tinged with plum- 

 beous on the crown and forehead, with gray on the rump and upper tail 

 coverts ; a short, inconspicuous, grayish stripe above the eye extending from 



