492 COEVID^. 



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. iii, 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, biit it agrees with that 

 genus in the supranasal and frontal feathers ; the limits of the genus here adopted are 

 exactly those of Mr. Sharps, 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. calif ornica 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. imicolor, 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 suhtus sordide albidum. 

 1. Aphelocoma caUfornica. 



Garrulus californicus, Vig. in Beechey's Voy. Zool. p. 21, t. 5 '. 



Cyanocitta caUfornica, Strickl. Ann. & Mag. N. H. xv. p. 342^j Scl. P.Z. S. 1858, p. 302'; 



1859, p. 381 %• Scl. & Salv. P. Z. S. 1869, p. 362' ; Sumichrast, Mem. Bost. Soc. N. H. 



i. p. 554"; Baird, Brew., & Ridgw. N. Am. B. ii. p. 288 \ 

 Aphelocoma caUfornica et A. sumichrasti, Sliarpe, Cat. B. Brit. Mus. iii. p. 113 °. 

 Cyanocitta floridana, Scl P.Z. S. 1856, p. 300°. 

 Cyanocitta sumichrasti, Ridgw. N. Am. B. ii. p. 283 ". 

 Cyanocitta caUfornica, var. sumichrasti, Lawr. Bull. U. S. Nat. Mus. no. 4, p. 24". 



Aaurea ; dorso medio et scapularibus fuscis ; superoiliis indistinctis albis ; loris et regione parotica nigricantibus ; 

 subtus sordide alba ; gnla et pectore vix fuseo striata ; rostro et pedibus nigris. Long, tota 11-3, alae 5-6, 

 caudse 5-8, rostri a rictu 1'3, tarsi 1'6. (Desor. maris ex Oaxaoa, Mexico. Mus. nostr.) 



ffah. NoETH America, Pacific coast-region from the Columbia river southwards, Mon- 

 terey 1. — Mexico (Salle », le Strange s), alpine region of Vera Cruz (Sumichrast % 

 Cinco Senores ^, La Parada ^ (Soucard), Oaxaca ^ (Boucard, Fenochio), Nacaltepec 

 (Sumichrast ^^). 



The white superciliary mark is not quite so apparent in Mexican specimens of this 



