274 CRACIDA. 
but we are unable to give a diagnosis, as he has omitted to state its precise characters. 
He says that it is found in the forests of Eastern Yucatan and Southern Campeche in 
common with C. globicera, the former being known to the Maya Indians as “ Bolonchan ” 
or “ Bolonchana,” whereas the latter is called ““Cambul.” It seems, however, extra- 
ordinary that two closely-allied species should inhabit the same area. 
Subfam. OREOPHASINA. 
Upper mandible broader than high, with an elevated naked cylindrical helmet ; 
top of head nearly naked. 
OREOPHASIS. 
Oreophasis, Gray, Gen. Birds, iii. p. 485 (1844) ; Grant, Cat. Birds Brit. Mus. xxii. p. 489 (1893) ; 
Game-Birds, ii. p. 217 (1897). . 
The American Mountain-Pheasant is distinguished by having the width of the 
upper mandible greater than the height, and by the possession of an elongate, straight, 
rather slender, cylindrical casque or helmet situated on the top of the head between 
the eyes. The crown is mostly naked, but the base of the upper mandible, as far as 
the nostrils, is densely covered with velvety feathers. ‘Tail-feathers 12. The first 
primary-quill is much the shortest, being about half the length of the fifth, which 
is equal to the tenth, the seventh slightly the longest. The sexes are similar in 
plumage. 
Only one species is known. 
1. Oreophasis derbianus. 
Oreophasis derbianus, Gray, Gen. Birds, ii. p. 485, t. 121'; Scl. & Salv. Ibis, 1859, p. 2247; 
P. Z. 8. 1870, p. 541°; Salv. Ibis, 1860, pp. 43, 248*; 1873, p. 429°; 1874, p. 188°; 
Grant, Cat. Birds Brit. Mus. xxii. p. 489"; Handb. Game-Birds, ii. p. 218 °*. 
Penelope fronticornis, Van der Hoev. Handb. der Zool. ii. p. 435°; Engl. edit. p. 422°. 
Niger, viridi adumbratus; loris, fronte et capitis lateribus velutino-nigris, gutture superiore fere nudo; 
prepectore et pectore albis, scapis plumarum nigris; abdomine, tibiis et hypochondriis brunnescenti- 
nigris ; corporis lateribus fere fulvescentibus, plumis medialiter saturatioribus; cornu capitali miniaceo ; 
pedibus saturate miniaceis: rostro pallide stramineo. Long. tota circa 36-0, ale 15°5, caude 15-2, 
tarsi 3°6. 
Q mari similis. (Descr. maris et femine ex Volcan de Fuego. Mus. nostr.) 
Hab. Guatemata', Volcan de Fuego?+, Chicaman® (0. 8S. & F. D. G.), Cerro Zunil 
(Champion). 
This remarkable species, one of the most interesting to be met with in Central 
America, was for a long time supposed to be confined to the high forests of the 
Volcan de Fuego, whence doubtless Mr. Skinner’s original specimen was obtained. 
In his expedition to Guatemala in 1857-8, Salvin, while staying at Duefias, at the foot 
of the volcano, procured several examples through an Indian hunter, José Ordofiez, 
