BIRDS PERDICIDAE — LOPIIORTYX. 
643 
The concealed feathers of the flanks have an oblique bar of white on the outer edges, the 
chestnut suffused with black towards the abrupt white edge. The feathers on the sides of the body- 
are banded very regularly and transversely with white and black, or white and chestnut, the 
colors becoming more or less suffused. The region around the anus is fulvous white without 
any markings. 
A specimen, collected at Fort Tejon by Mr. Vesey, differs in lacking the olive wash on the 
fore part of back and the neck which are pure plumbeous ; there is also much more of the dark 
chestnut on the belly. The crest is much longer, measuring 3^ inches. This is probably a 
male. The female appears to exhibit very little difference, except in the rather shorter crest. 
List of specimens. 
4490 
4309 
5935 
Locality. 
Cascade mountains, 0. T. 
Near Fort Jones, Cal 
California „ - 
Fort Tejon, Cal 
Wht'U collected. 
Whence obtained. 
Spring of 1855 
Lieut. Williamson . 
Dr. Suckley 
Dr. Heermann 
J. X. de Vesey 
Orig. No. 
Collected by- 
Newberry. 
LOPIIORTYX, Bonaparte. 
Lophortyx, Bonap. Geog. & Comp. List, 1838. Type Tetrao califomicus, Shaw. 
Ch. — Head with a crest of lengthened feathers springing from the vertex, the shafts in the same vortical plane, and the 
webs roof-shaped, and overlapping each other ; the number varies from two to six or more ; they widen to the tip, where they 
are slightly recurved. Tail lengtlicd and graduated ; nearly as long as the wing, composed of twelve stiff feathers. Wings 
with the tertials not as long as the primaries ; the coverts without any unusual development ; claws rather short ; the lateral 
reaching to, but scarcely beyond the base of the middle ; the outstretched toe not reaching the tip of the tail. 
The two North American species of the genus have the anterior half of the body, and the 
upper parts generally, plumbeous ; the feathers of neck above, and on the sides, pointed and 
margined with black. There is a white bar across the head above, between the eyes, which, 
passing backwards, is bordered behind and internally by black ; a second commences at ■jhe pos- 
terior border of the eye and then borders the black of the chin and throat laterally and behind, 
the black reaching up to the eye and bordered anteriorly by a white line from eye to bill ; belly 
pale buff, with a large spot in the centre ; the flanks streaked with white. The diagnoses of 
the species are as follows : 
Vertex and occiput light smoky olive brown ; forehead whitish ; spot in the middle of the 
belly orange chestnut ; feathers of breast with narrow black edges ; sides of body olivaceous 
plumbeous L. califomicus. 
Vertex and occiput clear chestnut brown ; forehead blackish ; spot in middle of belly black ; 
none of the belly feathers with black edges ; sides of body orange chestnut L. gambelii. 
