RICHARDSON’ S GROUSE. 99 
DENDRAGAPUS OBSCURUS RICHARDSONI. 
Geographical Distribution.—Eastern slopes of Rocky Moun- 
tains, from Northern Wyoming, and Southeastern Idaho to the 
Liard River, latitude 61 in British North America, 
Adult Male.—In general coloration this race resembles the 
D. obscurus, or Dusky Grouse, but has a differently shaped tail, 
which is much more square, and without any distinct terminal 
gray band, merely an edging of pale brown; the feathers also 
are much broader than those of the other two forms. In dimen- 
sions there is little, if any, difference. 
Adult Female.—A specimen of this sex, which belonged to my 
collection, and is now contained in the American Museum of 
Natural History, number 2901, while resembling closely the 
female of the Dusky Grouse on the upper parts, presents certain 
differences beneath : it is much lighter upon the throat, being a 
buffy white, speckled with brown, and there is a good deal of 
white exhibited on lower breast, and on the flanks, the feathers, 
which are slaty gray, being broadly tipped with this hue; the 
abdomen is slaty gray, the feathers only edged with whitish. 
Tail has the median feathers broadly barred with buff, and all 
are edged with whitish, the ground color being brownish black. 
