141. ROCK PTARMIGAN.

_Lagopus rupestris_ (Gmel.).

Common on the summit of most of the mountains on the Mainland and
Vancouver Island. (_Fannin_.) Quite common at Atlin.

142. WHITE-TAILED PTARMIGAN.

_Lagopus leucurus_ (Swains. & Rich.).

Found on the summit of most mountains on the Mainland except the Coast
Range. Taken at Okanagan. (_Brooks_.) Cassiar. (_James
Porter_.)

PEDIOECETES Baird.

143. COLUMBIAN SHARP-TAILED GROUSE. PRAIRIE CHICKEN.

_Pedioecetes phasianellus columbianus_ (Ord.).

An abundant resident east of Cascade Range through the southern
portions of the Province. E. P. Venables reports it common near
Vernon.

CENTROCERCUS Swainson.

144. SAGE GROUSE.