134 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Lagopus leucu^us rainierensis Taylor, Condor, xxii, 1920, 146 (Pinnacle Peak, 

 Mount Rainier, Wash., at 6,200 feet; coll. U. S. Nat. Mus.).— Oberholseh, 

 Auk, xxxviii, 1921, 266. — American Ornithologists' Union, Check-list, ed. 4, 

 1931, 85.— Bent, U. S. Nat. Mus. Bull. 162, 1932, 240 (habits).— Peters, Check- 

 list Birds World, ii, 1934, 35.— Cowan, Condor, xli, 1939, 82, 83 in text (crit.).— 

 KiTCHiN, Murrelel, xx, 1939, 30 (Mount Rainier National Park; resident; 

 spec). — HixLMAYR and Conover, Cat. Birds Amer., i. No. 1, 1942, 209 (syn. ; 

 distr.). 



lagopus leucurus altipetens obeood 



Southern White-tailed Ptarmigan 



Adults in summer plumage. — Like the corresponding plumage of 

 Lagopus leucurus leucurus, but with longer wings and tail. 



Adults in autumn plumage. — Similar to the corresponding plumage of 

 the nominate race but with longer wings and the general color above 

 paler, in some specimens more brownish buff — tawny-olive to sayal brown 

 and in others with very little buff and that little pale and ashy. 



Adults in winter plumage. — Distinguished from those of the nominate 

 race only by the longer wings of the present subspecies. 



First autumn plumage. — Like that of the typical race but averaging 

 more tawny-buff. 



Juvenal. — Similar to that of the typical race. 



Downy young. — Similar to that of the typical race. 



Adult male.— Wing 178-194 (187.5); tail 98-109 (104); exposed 

 culmen 11.7-14.9 (13.8); tarsus 30.2-33.7 (31.8); middle toe without 

 claw 23.3-26.3 (25.1 mm.).^^ 



Adult female.~Wmg 173-192 (181.6); tail 93-98 (95.6); exposed 

 culmen 12.5-14.3 (13.6); tarsus 31.3-33.4 (32.1); middle toe without 

 claw 24.1-26.1 (25.1 mm.).** 



Range. — Resident in the alpine summits of the Rocky Mountains from 

 Montana (Lewis and Clark, Teton, and Carbon Counties) through 

 Wyoming and Colorado to northern New Mexico (Sangre de Cristo 

 Mountains, Taos Mountains, Truchas Peaks, Culebra Mountains, Wheeler 

 Peak, Costilla Peaks). 



Type locality. — Mount Blaine, Colo. 



Tetrao {Lagopus) leucurus Nuttall, Man. Orn. United States and Canada, Land 

 Birds, 1832, 612, part; ed. 2, 1840, 820, part ("lofty ridge of the Rocky Moun- 

 tains," part). 



Lagopus leucurus Swainson, in Swainson and Richardson, Fauna Bor.-Amer., ii, 

 1831 (1832), pi. 63, part,— Bonaparte, Geogr. and Comp. List, 1838, 44, part.— 

 Audubon, Synopsis, 1839, 208, part; Birds Amer., 8vo ed., v, 1842, 125, part. — 

 Baird, Rep. Pacific R. R. Surv., ix, 1858, 636 (west side of Rocky Moun- 

 tains, near Cochetopa Pass, lat. 39°) ; Cat. North Amer. Birds, 1859, No. 469, 



" Eleven specimens from Wyoming, Colorado, and New Mexico. 

 " Five specimens from Wyoming and Colorado. 



