210 
TETRAO CANADENSIS. 
white spots are not very conspicuous. The breast, ^ 
is deep black, but each feather broadly tipped "j 
pure white, constituting the large spots by which tj| 
species is so peculiarly distinguished. On the 
the feathers are at first, from their base, waved " ' 
black and grayish rusty crescents; but these be 0 ® i 
gradually less pure and defined, and by getting conh lSf . 
make the lowest appear mottled with the two col®® 1 ^ 
all are marked along the shaft with white, dilating, 
tip, forming on the largest a conspicuous terminal 
The vent is for a space pure white, the tips of its do*j 
feathers being of that colour : the under tail-covert* . 
deep black, pure white for half an inch at their 
and with a white mark along the shaft besides. 
wings are seven inches long, the fourth primary 811 g 
being somewhat longer than the rest. The art' i 
coverts and scapularies are blackish, waved and nt®* 1 j) 
with grayish rusty ; the longest scapularies have a sl 5 
terminal spot of pure white along their shaft. 
smaller coverts are merely edged with grayish 
and, in very perfect specimens, they are even plain > 
under wing-coverts are brownish dusky, edged 'j 1 -, 
grayish, some of the largest, as well as the long axi*! i 
feathers, having white shafts, dilating into a ter® 1 j, 
spot; the remaining inferior surface of the wh’lLj 
bright silvery gray : the spurious wing and the A 
are plain dusky brown, the secondaries being slig®* 
tipped and edged externally with paler, and ® 1 ^ 
nearest the body somewhat mottled with grayish 1,u ? f p 
at the point, and on the inner vane ; the primaries, 
the exception of the first, are slightly marked f u 
whitish gray on their outer edge, but are cut ,r . 
destitute of white spots. The tail is six inches ]® J. 
well rounded, and composed of only sixteen f®* 
These are black, with a slight sprinkling of h 1 ' 1 ^ 
reddish on the outer web at base, under the c0 T e *ge 
which disappears almost entirely with age ; all ■. 
bright dark rusty for half an inch at their tip, 
colour itself being finely edged and shafted with 
The tarsus measures an inch and a half, its feat* 1 
