492 CORVIDA. 
sufficiently distinguish it from C. diademata. One of these dark birds, formerly in 
Bullock’s collection, is figured by Jardine and Selby?. The bird obtained by Mr. Taylor 
in Honduras, according to Mr. Sclater, agrees with Guatemalan examples *. 
APHELOCOMA. 
Aphelocoma, Cabanis, Mus. Hein. i. p. 221 (1851) ; Sharpe, Cat. B. Brit. Mus. ii. p. 112. 
This genus may be distinguished from Cyanocitta by the absence of an occipital 
crest, and the wings externally being destitute of black bands, but it agrees with that 
genus in the supranasal and frontal feathers; the limits of the genus here adopted are 
exactly those of Mr. Sharpe, though we divide it into three instead of two main 
sections. That in which the under surface of the body is greyish white is the only 
one which passes north beyond the limits of our region. In the United States this is 
represented over a considerable area including the south-western States, California, 
and the peninsula of Florida. As in the case of Cyanocitta, several of the forms are not 
very well defined ; and it is a question whether the Mexican form of A. californica is 
not separable from the northern bird, though we have not so treated it here. We 
fully expect to find that another species of this section of the genus, A. woodhousii, 
will be found in Northern Mexico, as it occurs in the frontier States of New Mexico and 
Arizona. Each of the other sections of the genus include but a single species, one of 
which, A. wnicolor, is common to the highlands of Southern Mexico and Guatemala; 
the other section contains A. nana only, a bird of very limited range in the highlands 
of Southern Mexico. 
a. Corpus subtus sordide albidum. 
1. Aphelocoma californica. 
Garrulus californicus, Vig. in Beechey’s Voy. Zool. p. 21, t.5°. 
Cyanocitta californica, Strickl, Ann. & Mag. N. H. xv. p. 342°; Scl. P.Z.S. 1858, p. 302° ; 
1859, p. 881*; Scl. & Salv. P. Z. S. 1869, p. 862°; Sumichrast, Mem. Bost. Soc. N. H. 
1. p. 554°; Baird, Brew., & Ridgw. N. Am. B. i. p. 2887. 
Aphelocoma californica et A. sumichrasti, Sharpe, Cat. B. Brit. Mus. iii. p. 118 °. 
Cyanocitta floridana, Scl P.Z. 8. 1856, p. 300°. 
Cyanocitta sumichrasti, Ridgw. N. Am. B. ii. p. 283°. 
Cyanocitta californica, var. sumichrasti, Lawr. Bull. U. 8. Nat. Mus. no. 4, p. 24". | 
Azurea ; dorso medio et scapularibus fuscis ; superciliis indistinctis albis ; loris et regione parotica nigricantibus ; 
subtus sordide alba; gula et pectore vix fusco striata; rostro et pedibus nigris. Long. tota 11:3, ale 5:6, 
caude 5:8, rostri a rictu 1-3, tarsi 1:6. (Descr. maris ex Oaxaca, Mexico. Mus. nostr.) 
Hab. Norva Amurica, Pacific coast-region from the Columbia river southwards, Mon- 
terey —Mexico (Sallé ®, le Strange®), alpine region of Vera Cruz (Sumichrast ®), 
Cinco Sefiores+, La Parada ? (Boucard), Oaxaca > (Boucard, Fenochio), Nacaltepec 
(Sumichrast 11), 
The white superciliary mark is not quite so apparent in Mexican specimens of this 
