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LAGOPUS MUTUS, VAR. RUPESTRIS (Leacg). 
ROCK PrARMIGAN. 
Specific Character.—Bill slender, distance from nasal groove to tip oe § 
ereater than height at base (.27). In summer the feathers of the back, black, 
banded distinctly with yellowish brown and tipped with white. In winter, a 
white, the tail black; the male with black bar from bill through eye. Size con- . 
siderably less than that of L. albus. ~ lam 
Length, about 14.50; wing, 7.50; tail, 4.50. ORS 
Female in ee Wine (expert upper coverts) and legs, white; tail, 
(except intermedize) black, narrowly tipped with white. Rest of plumage hght <4 
ochraceous or buff, some feathers tipped with white, and all with broad transverse a 
bands of black, this colour prevailing on the dorsal region. On the lower surface __ 
the buff bars exceed the black ones in width. Wing, 7.20; tarsus, 1.15; middle 
toe, 90; bill, .385 by .27. | er 
Habitat.—Arctic America. . 
Mr. MaclIlwraith quotes Mr. Bampton of Sault Ste. Marie for the appearance 
of this bird in that locality. It is also Sg et that these birds reach the © ore 
vicinity of Ottawa and Montreal. re. 
In its general habits it much resembles the L. albus. All these bind are E 
feathered to the toe nails with long white hair like feathers and in summer ~ 
change their plumage to correspond with the surroundings. : 
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