218 LLOYD'S NATURAL HISTORY. 
Tail composed of twelve feathers. 
First primary flight-feather much the shortest, about half the 
length of the fifth, which is equal tothe tenth; seventh slightly 
the longest. 
Leg (metatarsus) slightly longer than the middle toe and 
claw. 
Sexes similar in plumage. 
Only one species is known. 
I. THE EARL OF DERBY’S MOUNTAIN-PHEASANT. OREOPHASIS 
DERBIANUS. 
Oreophasts derbianus, Gray, Gen. B. ili. p. 485, pl. cxxi. (1844) ; 
Sclater and Salvin, Ibis, 1859, p. 224; Ogilvie-Grant, Cat. 
B. Brit. Mus. xxii. p. 489 (1893). 
Penelope fronticornis, Van der Hoev. Handb. der Zool. ii. p. 
435 (1852-56). 
Adult Male and Female.-—General colour above black, glossed 
with dark green ; base of upper mandible, forehead, and sides 
of the head velvety black ; base of throat nearly naked; chest 
and breast white, with dark shaft stripes; sides mostly buff, 
with dark centres to the feathers; a wide white band across 
the middle of the tail. Helmet (thinly covered with hair-like 
feathers), legs, and feet, deep vermilion ; bill, pale straw-colour ; 
iris, white. 
Male: Total length, 36 inches; wing, 15°5; tail, 15:2; 
tarsus, 3°6; middle toe and claw, 3°4. 
Female: Somewhat smaller ; wing, 14°8 inches. 
Range.—Central America ; woods of the Volcan de Fuego, 
Guatemala. 
Habits—This fine bird, one of the most interesting to be met 
with in Central America, still remains one of the rarest prizes, 
and, so far as I am aware, is only to be found on the Volcan 
