Note 112 — Family CRACIDÆ.—The Curassows.
Reading edition
Messrs. Sclater and Salvin distinguish the allied species as follows:—
O. poliocephala, Wagler. Brownish-olive; the head plumbeous, lighter beneath; the feathers of the throat darker, and marked with gray; middle of belly milky-white; the flanks and crissum tinged with rufous; tail bronzed-green, the five lateral feathers broadly tipped with buff. Length, 24.00; wing, 10.50; tail, 11.50; tarsus, 3.20. Hab. Table-land of Mexico to west coast (Manzanillo, etc.).
O. vetula, Wagler. Brownish-olive; the head plumbeous, lighter beneath; the middle of the belly tinged with ochraceous or rusty; tail, bronzed green; the five lateral feathers tipped with white or buff. Length, 21.00; wing, 7.70; tail, 9.00; tarsus, 2.50. Hab. Texas to Honduras, on east side of Mexico.
A near ally to O. vetula is the O. leucogastra, Gould (S. & S. p. 539) from Pacific coast of Central America. This differs in pure white of under parts. The size also is considerably less.