204 NORTH AMERICAN BIRDS. 
on ground in open situations. Zygs about 6-12, or more, varying from olive-buffy 
to deep brown, often plain, but usually more or less speckled with dark brown. 
a’. Very dark-colored, witk black or dusky largely predominating on upper parts, the 
white scapular streaks and wing-spots showing in strong relief; feathering on 
legs deep brownish gray. Eggs 1.75 x 1.26. Hab. Interior of British America, 
north to Fort Simpson, Fort Resolution, and Great Slave Lake, south to 
Moose Factory, Temiscamingue, Lake Winnipeg, and northern shore of Lake 
Superior.....cececcceeenes 308. P. phasianellus (Linn.). Sharp-tailed Grouse. 
a’. Lighter colored, the general color of upper parts buffy grayish or light brownish 
of various shades, always predominating over black markings, the white 
markings on scapulars and wings not conspicuously contrasted with the 
general color; feathering of feet pale brownish gray. 
&.. Ground-color above buffy grayish or pale grayish clay-color, with little if 
any rusty tinge. Eggs 1.69 X 1.26. Hab. Northwestern United States, 
south to northern California, Nevada, and Utah, east to western edge 
of Great Plains in Montana, north, chiefly west of Rocky Mountains (?) to 
Fort Yukon, Alaska........ 308a. P. phasianellus columbianus (Orp). 
Columbian Sharp-tailed Grouse. 
v%. Ground-color above more rusty or ochraceous. Hggs 1.67 x 1.24. Hab. 
Great Plains of United States, north to Manitoba (?), east to Wisconsin 
and northern Illinois, west to eastern Colorado, south to eastern New 
MOXICO..c.scescsacoscagisseenen sd 308). P. phasianellus campestris Ripew. 
Prairie Sharp-tailed Grouse. 
Genus CENTROCERCUS Swainson. (Page 185, pl. LX., fig. 1.) 
Species. 
Adult male: Above mixed grayish and buffy, very irregularly varied with 
black, the tertials bordered terminally with white, and some of the feathers (especi- 
ally wing-coverts) having mesial streaks of the same; quills brownish gray, some- 
times mottled along edges with paler; cheeks, chin, and throat spotted black and 
white, the former usually predominating (sometimes uniform on first)—this blackish 
area bordered behind by a more or less distinct white crescent, the extremities of 
which reach upward to the eyes; fore-neck black, the feathers sometimes bordered 
or edged with grayish white; below this (on chest) dull grayish or whitish, the 
feathers with very stiff, wiry black shafts; belly uniform black, the surrounding 
portions chiefly white; lower tail-coverts black, broadly tipped with white; length 
about 26.00-30.00, wing 12.00-13.00, tail 11.00-13.00, weight 44 to 8 lbs. Adult fe- 
male: Similar to male, but much smaller, the chin and throat entirely white, black 
patch on fore-neck replaced by speckled grayish, etc.; length 21.50-23.00, wing 
about 10.50-11.00, tail 8.00-9.00. Young: Somewhat like adult female, but much 
browner above, black abdominal area indistinct, and markings of lower parts gen- 
erally less distinctly defined. Downy young: Above brownish gray, coarsely and 
irregularly marbled with black, these markings most conspicuous on head. Nest on 
