BIKDS — TETEAONIDAE — LAGOPUS ALBUS. 



633 



Size smaller. Bill slender, rather compressed at tip. The distance from the nasal groove to 

 the tip of hill decidedly greater than the height of the bill. Male with a black stripe through 

 the eye , L. rupestris. 



Tail/eathers entirely white. 

 No black whatever in the winter bird ,L, leucurus. 



Comparative measurements of species. 



LAGOPUS ALBUS, And. 



Willow Grouse ; White Ptarmigan. 



Tetrao albus, Gmelin, I, 1788, 750. (Hudson's Bay.) 

 ■ Lagopus albus, AuD. Syn. 1839, 207.— Is. Birds Amer. V, 1842, 114; pi. 299. 

 Tetrao (Lagopus) albus, Nwttall, Man. I, 2d ed. 1840, 816. 

 ? Tetrao lagopus, Forster, Phil. Trans. LXII, 1772, 390. 

 Tetrao saliceti, Sabine, App. Franklin's Narr. 681. — Rich,' App. Parry's 2d Voyage, 347.— AuD. Orn. Biog. II, 



1834,528; pi. 191. 

 Tetrao {Lagopus) saliceti, Swainson, F. Bor. Am. II, 1831, 351. 

 White Grouse, Pehnant. 



Sp. Ch. — Bill very stout. Bill as high as the distance from the nasal groove to its tip. In summer, rufous or orange chestifct 

 on the head and neck ; the feathers of back black, barred rather closely with yellowish brown and chestnut. In winter, white ; 

 the tail black, but no black through the eye . Length, 15 .50 ; wing about 8 .00 ; tail about 5 .00. 



HoJ.— Northern America. Rare in northern parts of United States. 

 July 7, 1858. 



80 b 



