330 
TETRAO LAGOPUS LEUCURUS. 
grouse, whose males first assume the summer colours* 
The rock grouse is found also on Melville Peninsula 
and the Barren Grounds, seldom going farther south 
winter than latitude 6*3° in the interior, but descending 
along the coast of Hudson’s Bay to latitude 58°, an'* 
in severe seasons still farther to the southward. # 
also occurs on the Rocky Mountains as far south f 
latitude 55°. It exists in Greenland, is common 
Norway, is known in Sweden by the name of sno rissQ\ 
and is the species most frequent in the museums < 
France and Italy under the name of Tetrao logoff' I 
It is not a native of Scotland. The rock grouse, in 
manners and mode of living, resembles the wiilo' v 
grouse, except that it does not retire so far into th c 
woody country in winter. Contrary, however, to wh^ | 
Hearne says, it is frequent in open woods on th 1 ’ 
borders of lakes in that season, particularly in th (1 j 
sixty-fifth parallel of latitude, though, perhaps, i 
bulk of the species remains on the skirts of the Barrel 
Grounds. It hatches in June. The ground colour ° j 
the egg is, according to Captain Sabine, a pale reddisj* 
brown, and is irregularly blotched and spotted 
darker brown.” — Richardson . 
41. TETRAO ( LAGOPUS ) LEUCURUS , RICH. 
WHITE-TAILED GROUSE. 
Genus, Tetrao, Linn. Swains. — Sub-genus, (2,) Lagopus, \ 
In winter is entirely white : in summer coloured ; the M 1 
white . 
Of this undescribed species I have only five 
mens, four procured by Mr Drummond on the Rotfb? 
Mountains, in the fifty-fourth parallel, and one by *}* | 
Macpherson on the same chain, nine degrees of latit« u ° ! 
farther north. Mr Douglas killed several in 1827, h llf ' 
through the want of means of carriage, was obliged ^ j 
leave them behind. It is said to have the habits of ^ 
ptarmigan, and to inhabit the snowy peaks near tb®, | 
mouth of the Columbia as well as the lofty ridges 0 
