BIRDS OF NORTH AND MIDDLE AMERICA 131 



Lagopus leucurus peninsidaris Osgood, North Amer. Fauna, No. 30, 1909, 60 

 Ogilvie Range, Yukon ; crit. ; voice) . 



LAGOPUS LEUCURUS PENINSULARIS Chapman 



Kenai White-tailed Ptarmigan 



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

 the nominate form but with the blackish areas more extensive, the ,buff 

 areas paler — whitish to pale pinkish buff, only the broader marks slightly 

 darker — pinkish buff. 



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

 the nominate form but with the general tone of the plumage usually 

 grayer, the buff being definitely less noticeable than the gray (exceptions 

 do occur, however). 



Adults in winter plumage. — Like that of the nominate form. 



First autumn plumage. — Similar to that of the nominate race but 

 averaging grayer. 



Juvenal plumage. — Like that of the typical race. 



Downy young. — Like that of the typical race. 



Adult male.— Wing 168-180 (174) ; tail 92-103 (95) ; exposed culmen 

 12-14.5 (13.4) ; tarsus 32.4-34 (33.3) ; middle toe without claw 

 24.4-27 (25.6 mm.). 39 



Adult female.— Wing 164-171 (167.8) ; tail 85-93 (90) ; exposed cul- 

 men 13.4-13.9 (13.7); tarsus 32.5-33.6 (33) ; middle toe without claw 

 24.1-27.3 (25.2 mm.).« 



Range. — Resident in the alpine summits from south-central Alaska 

 (Mount McKinley) south to the Kenai Peninsula (Bear Creek, Lake 

 Clark, Cook Inlet, White Pass, Glacier Bay, Seward, Kenai Mountains). 



Type locality. — Kenai Mountains, Alaska. 



(?) Lagopus leucurus Hartlaub, Journ. fiir Orn., 1883, 277 (Alaska; crit.). 



Lagopus leucurus {Tetrao leucurus Swainson) Bishop, North Amer. Fauna, No. 

 19, 1900, 72 (summits of cliffs above Glacier, Alaska; breeding). — Osgood, 

 North Amer. Fauna, No. 21, 1901, 75 (head of Bear Creek, Cook Inlet, breed- 

 ing) ; No. 24, 1904, 67 mountains on nw. side Lake Clark, Alaska Peninsula). — 

 Bailey, Handb. Birds Western United States, 1902, 129, part. 



L{agopus} leucurus Coues, Key North Amer. Birds, ed. S, 1903, ii, 749, part 

 (Alaska). 



Lagopus leucurus leucurus Brooks, Bull. Mus. Comp. Zool., lix, 191S, 366 (Muir 

 Inlet, Glacier Bay, Alaska). — Bailey, Auk, xliv, 1927, 201 (valley of Granite 

 Creek Basin, se. Alaska). 



Lagopus leucurus peninsularis Chapman, Bull. Amer. Mus. Nat. Hist., xvi, 1902, 

 236 (Kenai Mountains, Alaska; coll. Amer. Mus. Nat. Hist.); Ibis, 1903, 267, 

 in text (crit.). — American Ornithologists' Union, Auk, xxv, 1908, 346; Check- 

 list, ed. 3, 1910, 143 ; ed. 4 1931, 84.— Macoun and Macoun, Cat. Can. Birds ed. 2, 



' Five specimens from Kenai area, Alaska. 

 ' Six specimens from the Kenai area, Alaska. 



