274 CKACID^. 



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. OREOPHASINM. 



Tipper mandible broader than high, with an elevated naked cylindri-cal helmet ; 



top of head nearly naked. 



OEEOPHASIS. 



Oreophasis, Gray, Gen. Birds, iii. p. 485 (1844) ; Grant, Cat. Birds Brit. Mas. 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 derbianns. 



Oreophasis derbianus, Gray, Gen. Birds, iii. p. 485, t. 121'; Scl. & Salv. Ibis, 1859, p. 224'; 



P. Z. S. 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 fronticomis, Van der Hoev. Handb. der Zool. ii. p. 435 ' ; Engl. edit. p. 422 ". 



Niger, viridi adumbratns ; loris, fronte et capitis lateribus velutino-nigris, gutture superiore fere nudo ; 

 praepectore et pectore albis, scapis plomarum nigris ; abdomine, tibiis et bypochondriis brnnnescenti- 

 nigris ; corporis lateribus fere fulvescentibus, plamis medialiter saturatioribus ; comu capitali mimaceo ; 

 pedibu3 saturate miniaceis : rostro pallide stramineo. Long, tota circa 36'0, alse 15'5, caudae 15*2, 

 tarsi 3-6. 

 2 marl similis. (Desor. maris et feminae ex Volcan de Fuego. Mus. nostr.) 



Hab. Guatemala S Volcan de Fuego ^4, Chicaman^ {0. S. & 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 Duenas, at the foot 

 of the volcano, procured several examples through an Indian hunter, Jose Ordonez, 



