228 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



These two females are only distingiiisliable, the one from the other, 

 by a slight variation in the shade of the yellowish -brown. Ihe bird 

 from France is a little lighter in color than the other; the tendency to 

 produce distinct bars of black, alternating with yellowish-brown, is very 

 well marked, while on the inferior surface there is a somewhat distinct 

 tendency to broader gray tips to the feathers. These markings are so 

 little different from the pattern of coloration of the other specimens that 

 it is not easy to exactly define the points of discrepancy. 



No. 56825, 5, ad., "X. mutus,''^ Switzerland, summer. 



General color above similar to No. 44582, "i. rupestris,'' Barren 

 Grounds of Arctic America. The yellowish-brown is lighter and the 

 bars narrower. The black bars also narrower and somewhat broken 

 into (lots or spots. The ends of most of the feathers of the upper parts, 

 iugulum, breast, sides, and flauks, broadly tipped with white. The best 

 expression to define the coloration of this example in contradistinction 

 to No. 44582, is to state that it (the Switzerland bird) is paler. 



No. 33549, $, ad., "T. lagopus,^^ Norway, June 11. 



No. 856, 9, yng., '' T. larjoxms,^^ Norway (nearly two-thirds grown). 



These two birds are conspicuous for the finer, narrower bars of yel- 

 lowish-brown and black. The back, rump, tail-coverts, shoulders, sides, 

 and upper part of the flanks distinctly tipped with white on the greater 

 number of the feathfers. The jugulum and upper breast less marked 

 with the white tips of the feathers, but more distinctly barred with black 

 and the yellowish-brown. 



2. Lagopus mutus rupestris (Gm.) Ridgw. 



No. 2855, Barren Grounds of Arctic America, c? , ad., summer. Crown 

 blackish, with white tips to some of the feathers, others very narrowly 

 lipped with faint yellowish-brown. Neck and sides of head with greater 

 area of white on tips of feathers. Back, rump, and tail-coverts very 

 dusky witli fine vermiculations of fulvous and gray, having but little 

 tendency to barring. The upper breast, sides, and jugulum barred 

 with black and very light fulvons, some of the feathers broadly tipped 

 with gray. 



No. 43675, 9, ad., Fort Yukon, Alaska, June, 1864. 



Head, entire neck, sides, breast, flanks, and abdomen light yellowish- 

 brown, distinctly barred with black. Back, rump, and u]>per tail coverts 

 very distinctly barred with bright yellowish-brown, each feather of the 

 upper parts broadly tipped with a crescentic margin of grayish. The 

 tail merely tipped with whitish. 



No. 80100, 9, ad.. Gens de Large Mountains, Arctic America. This 

 example ])resents a lighter yellowish-brown coloration, occupying a 

 slightly greater area than No. 43675, and the black bars being more re- 

 stricted in width are not less conspicuous and the tips of the feathers 

 more grayish. No other essential diflerences can be distinguished. 



Catalogue No. 73488, Unalashka, May 18, 1877. 



