230 GALLIFORMES CHAP. 
grey above, with blackish markings anteriorly, olive tints on 
the mantle, and buff on the wings; the throat and some blotches 
on the flanks are chestnut, the breast is grey with black spots, 
the abdomen grey and buff, the tail mainly black and white. 
The male has two stout spurs. TZ. széchenyit of Central Tibet 
has the throat fawn-coloured, and the whole of the under parts 
blotched with chestnut. The habits are apparently somewhat 
similar to those of the last genus. Lerwa nivicola, the “Snow- 
Partridge,” ranging from the Himalayas to Western China, has 
black upper parts with white cross-bars, which become rufous 
buff on the mantle and wings; the under surface is chestnut, 
with black and white markings only shewing towards the belly. 
A pair of spurs distinguishes the cock from the hen. This species 
inhabits broken grassy or heathery sides of mountains in the midst 
of snow, up to an altitude of at least fourteen thousand feet ; it 
is tamer than the Snow-Pheasant, flies equally well, and nestles 
under jutting rocks. The coveys feed on moss, seeds, and insects, 
and utter a short double Grouse-like note or a harsh whistle. 
Sub-fam. 4. Odontophorinae,,—The “American Partridges,” 
are Quail-like birds, rarely attaining the size of a Red Grouse, and 
readily distinguished from their kin by the doubly-toothed mandible 
and the lack of spurs. The sexes are alike, if not otherwise stated. 
Of some four species of Dendrortyx, ranging from South 
Mexico to Costa Rica, D. macrurus, of the former country, has 
a black head and throat, with a long white streak above and 
below each eye, and a rufous tip to the short, full occipital crest. 
The neck and back are chestnut and grey ; the rump, wings, and 
tail are browner with black mottlings; the breast is greyish 
with rufous streaks. The bill, feet, and naked orbits are coral- 
red. Callipepla squamata, of the South-Western United States 
and Mexico, has a grey-brown head, with white-tipped crest and 
buff throat; the wings, rump, and tail are brownish-grey with 
white inner margins to some of the scapulars and secondaries ; 
the mid-breast and belly are fawn-coloured. The remaining 
plumage is grey, with black margins to the feathers which 
cause a scaly appearance, and shews dusky triangular spots beneath. 
Oreortyx pictus of the Western United States possesses two very 
long black occipital plumes; olive-brown upper parts with white 
edges to the scapulars and outer secondaries; slaty head, neck, 
' For further details ef. Gould, Monograph of the Odontophorinae, London, 1850. 
