52 TETEAOXID^. 



outer pairs is confined to the basal third of the outer web in the 

 seventh pair, but in the outermost pair, at least, the basal two-thirds 

 of the outer web is white. 

 Hah. Spitzbergen. 



a. 5 ad. sk. South shore of la Sound, Spitz- Gould Coll. (Type of 



bergen, June {E. Evans). L. hemileucurus.) 



b. Imm. sk. Spitzbergen. Lords of the Admiralty 



[P.]. 



6. Lagopus leucurus. 



Tetrao (Lagopus) leucuru?, Sw. ^ Rich. Faun. Bor.-Amer. ii. p. 356 



pi. 63 (1831) ; Natt. Man. Orn. ii. App. p. 612 (183i), & i. p. 820 



(1840). 

 Tetrao leucurus, And. Orn. Biogr. v. p. 200, pi. 418 (1839). 

 Lagopus leucurus, Douijl. Tr. Linn. Soc. xvi. p. 146 (1829) * ; Aud. 



B. Amer. v. p. 125, pi. 302 (1842) ; Baird, B. N. Amer. p. 636 



(1860) ; Blakist. Ibis, 1863, p. 128 : Elliot, Mon. Tetr. pi. xxv. 



(1865) ; Gray, List Gallinm Brit. Mm. p. 03 (1867) ; id. Hand-l. B. 



ii, p. 278 (1870) ; Coop. Calif. Orn. i. p. 542 (1870) ; Baird, Brew., 



^ Ridgw. B. N. Amer. iii. p. 464 (1874) ; Brewer, P. Bost. Soc. 



xvi. p. 348 (1874) ; Cones, Bull. U.S. Geol. Sun. i. p. 263 (1876) ; 



Scott, Nutt. Orn. C. iv. p. 96 (1879) [Colorado] ; Dreiv, Bull. Nutt. 



Orn. C. vi. p. 141 (1881) [Colorado] ; Hartl. J. f. 0. 1883, p. 277 ; 



Stejn. Zeit. ges. Orn. i. p. 92 (1884) ; Coues, Key, p. 588 (1884) ; 



Drew, Auk, i. p. 392 (1884), ii. p. 17 (1885) [Colorado]; Olphe- 



Gall. Faun. Orn. Eur. Occ. fasc. 37-40, p. 64 (1886) ; A. O. U. 



Check-l. p. 174 (1886) ; Ridgio. Man. p. 202 (1887). 



Adult male. Easily distinguished from the other species of 

 Lagopus at all seasons by having the outer tail-feathers pure white. 

 The changes of plumages are similar to those of L. niutus, but the 

 prevailing tints of the upper parts in summer are rufous buff or 

 greyish buff, coarsely barred, marked, and spotted with black, the 

 chest, breast, and sides white widely barred with black, often 

 mingled with rufous buff, and the wings aud the rest of the under- 

 parts white. In autumn the ground-colour of the upper parts is 

 chiefly rufous buff, vermiculated and finely barred with black; 

 middle tail-feathers partially or entirely rufous buff, freckled with 

 black ; chest, upper breast, sides, and Hanks like the upper parts, 

 but usually more or less mixed with the black-barred feathers of 

 summer. Winter plumage pure white ; no black patch in front of 

 the eye. Total length 12'6 inches, wing 7'3, tail 4-3, tarsus 1-2. 



Adult female. In summer plumage very different to the male, the 

 upper parts being black, coarsely barred and marked with rufous ; 

 the whole of the underparts pale rufous buff, barred with black ; 

 the wings and tail are white like those of the male. The autumn 

 aud tuinter plumages are similar to those of the male, but in the 

 former some of the summer plumage is retained on the breast. 

 Total length 12 inches, wing 7*2, tail 3-7, tarsus 1*2. 



Immature birds have the primaries more or less finely mottled 

 with brown. 



* No name given. 



