CYANOCITTA. 49] 
not been able to trace the range of C. diademata very satisfactorily. It was described 
by Bonaparte from a specimen in the Darmstadt Museum from Zacatecas, and we have 
examples from the neighbourhood of the city of Mexico. Oaxaca birds all appear to 
belong to OC. coronata, which, according to Sumichrast, is the form found in the State 
of Vera Cruz, and we have certainly no trace of C. diademata in Guatemala. It occurs, 
however, in the Mexican State of Puebla‘, which is probably its most southern limit. 
It doubtless spreads thence through the tablelands of Central Mexico, until its place is 
taken further north by C. macrolopha. 
8. Cyanocitta coronata. 
Garrulus coronatus, Sw. Phil. Mag. new ser. i. p. 437°; Jard. & Selb. Ill. Orn. ii. t. 64°. 
Cyanocoraz coronatus, Bp. P. Z. S. 1837, pp. 109°, 115*; Scl. P.Z. 8. 1859, p. 365°. 
Cyanogarrulus coronatus, Bp. Consp. Av. i. p. 377 °. 
Cyanocitta coronata, Scl. P. Z.S. 1858, pp. 3027, 359°; Taylor, Ibis, 1860, p. 112°; Lawr. Bull. 
U. S. Nat. Mus. no. 4, p. 247°; Dugés, La Nat. i. p. 189". 
Cyanurus coronatus, Scl. & Salv. Ibis, 1859, p. 22”; Scl. P.Z.S. 1859, p. 381; Sumichrast, 
Mem. Bost. Soc. N. H.i. p. 554". 
Preecedenti similis, sed dorso, pectore et crista ceeruleis haud difficile distinguenda. 
Hab. Mexico 3%, tableland (Bulloch 12), alpine region of Vera Cruz (Sumichrast \), 
Jalapa (de Oca*), La Parada (Boucard’), Cienguilla (Swmichrast'°), Juquila 
(Boucard 8); Guaremata (Velasquez), Volcan de Fuego 6000 to 8000 feet, 
Barranco de los Chocoyos 22, Totonicapam, San Raymundo, Santa Barbara, Chilasco 
(0. S.& F.D. G.); Honpuras, between Siguatepeque and Taulevi (Taylor ® °). 
Swainson’s type of this species * was said to have been procured by Bullock in the 
tablelands of Mexico, but no special locality is mentioned. Sumichrast speaks of it 
as a resident in the alpine region of Vera Cruz, where it reaches to the extreme limits 
of vegetation on the Volcano of Orizaba, confining itself to the forests of pines and 
oaks; he adds that it does not descend below an elevation of 4500 feet, and that it is 
never seen on the plains. In Guatemala it is an abundant species in the upland oak 
and pine forests lying at an elevation of from 5000 to 8000 feet, and it inhabits a 
higher zone than Cyanolyca melanocyanea, which for the most part takes its place at 
a lower level. C. coronata is usually found in small flocks of four or five individuals, 
which have the noisy habits common to the members of this section of the Corvide. 
Some Mexican specimens of this bird have the blue colour of the crest of a deeper tint 
than others, and for the most part the crest of Mexican examples is darker than that of 
Guatemalan birds; but it isalways obviously blue, and so is the throat, and these points 
* The actual type appears to be no longer extant, so that it cannot be referred to to decide the colour of 
the crest ; but Swainson’s description seems sufficiently explicit. It runs as follows :— Crested ; blue, sides 
of the head blackish ; chin, front, and eyebrows whitish ; wing covers and tertials banded with black lines; 
tail rounded.”’ 
62* 
