Se a Ae i Le 
a Re AA 
TETRAONIDE, GROUSE, PARTRIDGES.—GEN. 179, 180. 238 
usually some tawny, especially on the wings; quills variegated with tawny ; 
tail with a terminal orange-brown band, its upper coverts plain; 15-17; 
wing 7; tail 5; Q rather less, no con- 
tinuous black below, but variegated 
with blackish, white and tawny; above, 
much as in the ¢, but more tawny. N. 
Am., northerly; in Brit. Am., W. to 
Alaska; in U. S., W. to Rocky Mts. ; 
S. into the northern tier of states; 
Maine, and casually to Massachusetts. 
Nurt., i, 667; Aup., v, 83, pl. 294; 
MeO22. 2) 2...” CANADENSIS. 
Var. FRANKLINU. ‘Tail less rounded, 
lacking the terminal orange-brown band, 
and its upper coverts conspicuously white-tipped. Rocky and Cascade Mts., U.S. 
Bp., 623; Coor., 529. 
** Tail normally of 20 (18-22?) feathers. (Dendragapus.) 
Dusky Grouse. @ blackish, more or less variegated with slate-gray, or 
a peculiar slaty-black; throat and sides marked with white; breast black ; 
belly slate; tail clouded with slate and black, and with a broad terminal 
slate bar; 18-20; wing 9-10; tail 7-8; 9 smaller, not particularly different 
in color, but not so uniformly dark, having ochrey or reddish-brown variega- 
tion in places. Rocky and other Mountains, U. 8. to the Pacific. Nurr., 
1, 666; Aup., v, 89, pl. 295; Bp., 620; Coor., 526. . . . OBSCURUS. 
Var. nicuarpsonu. Tail nearly square, entirely black, or with only a slight 
slate tipping. Central Rocky Mountains and northward. Coop., 582. 
Fic. 147. Canada Grouse. 
179. Genus CENTROCERCUS Swainson. 
Sage Cock. Cock of the Plains. Tail very long, equalling or exceeding 
the wings, of twenty stiffened, graduated, narrowly acuminate feathers ; 
sides of lower neck with a patch of peculiar sharp scaly feathers, the shafts 
of which terminate in bristly filaments, sometimes 3-4 inches long in the 
@ ; tarsi full feathered. Very large; two feet or more long, wing and tail 
each about a foot; ¢ much smaller. Above, variegated with black, gray 
and tawny ; below, a large black abdominal patch in the adult. Confined to 
the sterile plains and ‘sage-brush (Artemisia) tracts of Western U.S. ; 
S. to about 35° (Mojave river; Cooper). Sw. and Ricu., F. B.-A. ii, 358, 
pl. 58; Nurr., i, 666; Aup., v, 106, pl. 297; Bp., 624. UROPHASIANUS. 
180. Genus PEDIG:CETES Baird. 
*,* Neck without peculiar feathers; tail very short, of sixteen narrow, soft, true 
rectrices, and a middle pair, apparently developed coverts, projecting an inch 
beyond the rest; tarsi fully feathered. Length about 18; wing 8-9; tail 5-6. 
Below, white, with numerous dark marks; above, variegated with blackish and 
white, or tawny; quills dusky, with white or tawny spots on the outer web; 
central tail feathers like the back, others white on the inner web. Sexes alike. 
KEY TO N. A. BIRDS. 30 
