208 
TETRAONIN^. LAGOPUS. 
and only in patches^ some greyish-white undulations occasionally seen, 
tend to approximate the colouring to that of some specimens of Lagopus 
mutus of Scotland, but the prevailing tint is not grey, as in that spe- 
cies, but brownish-yellow. Young similar to the adult, with the bands 
larger ; the fore part of the wings, the primaries, secondary coverts, 
and abdomen, white. 
Male, 14|, wing, 8^. 
Melville Island. Churchill River. 
Tetrao lagopus, Sabine, Richaudson, &c. 
Tetrao (Lagopus) mutus, Ptarmigan, Swains. & Rich. F. Bor. Amer. v. ii. p. 350. 
Common Ptarmigan, Tetrao mutus, Aud. Orn. Biog. v. v. p. 196. 
303. 3. Lagopus rupestris, Gmel. Rock Ptarmigan. 
Plate CCCLXVIII. Male and Female. Plate CCCCXVIII. Fig. 1. 
Bill very short, thick, convex (stronger than that of L, americanus), 
with the ridges on the lower mandible faint ; claws elongated, arched, 
with the sides sloping, the edges thin and nearly parallel, the tip nar- 
rowed, broader than in jL. alhus). Tail short, slightly rounded, of 
fourteen feathers, independently of the long incumbent coverts. Bill 
black, claws dusky, with the edges and tip inclining to yellowish-grey. 
In winter, the plumage white, excepting the shafts of the primaries, 
which are brownish-black, and the tail-feathers, which are black, nar- 
rowly tipped with white, and with the base of the same colour. In 
summer, the plumage variegated with black, reddish-yellow, and 
white ; the feathers being chiefly of the first colour, transversely and 
irregularly banded with reddish-yellow, and terminall}^ margined with 
white ; lower parts more broadly and regularly barred with brownish- 
black and light reddish-yellow ; edge of wing, alula, primary coverts, - 
nearly all the secondary coverts, primaries, and outer secondaries 
white, as are the lower surface of the wing, the axillars, and some of 
the feathers on the abdomen, as well as those on the feet, the latter 
tinged with yellowish ; shafts of primaries brownish-black ; tail as in 
winter, but with the lateral feather white on a great paft of the outer 
web. Female similar, with the bands broader. 
Male, 13|-, wing, 7x§* 
Breeds from Labrador to the Arctic Seas. Rocky Mountains. Abund- 
ant. Migratory. 
Tetrao (Lagopus) rupestris, Swains. & Rich. F. Bor. Amer. v. ii. p. 354. 
Rock Grouse, Nutt. Man. v. i. p. 610. 
Rock Grouse, Tetrao rupestris, Aud. Orn. Biog. v. iv. p. 483. 
304. 4. Lagopus leucurus, Swains. White-tailed Ptarmigan. 
Plate CCCCXVIII. Adult in winter. 
Claws slightly arched, depressed, broad, thin-edged, rather pointed ; 
tail rather short, slightly rounded, of fourteen feathers. Plumage in 
