794 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



red; nuptial tufts present in a rudimentary condition but of a light 

 brownish color. 



Young in first summer or autumn. — Similar to the preceding but 

 bill smaller, narrower, and more brownish, and without indication of 

 nuptial tufts. 



Downy young. — Uniform dark sooty grayish brown, paler below, 

 especially on abdomen, where inclining to sooty gray. 



Adult male.— Wmg, 187-206 (194.4); tail, 57-64.5 (62.3); culmen, 

 53-65 (60.2); greatest depth of bill, 41-51 (46.8); tarsus, 30-34.5 

 (32.4); middle toe, 45.5-53.5 (49).'^ 



Adult female.— Wmg, 179.5-196.5 (189.2); tail, 58-64 (63); cul- 

 men, 54.5-60 (57.1); greatest depth of bill, 43-47 (44.6); tarsus, 

 29-33 (31.1); middle toe, 43-49 (46.2).'' 



Coasts and islands of Bering Sea and contiguous portions of Arctic 

 and Pacific oceans; breeding from Koliutschin Island (Arctic coast 

 of eastern Siberia, near Bering Strait) and Cape Lisburne, Alaska, 

 to Aleutian, Commander, and Pribilof Islands, on American side 

 breedmg southward to coast of California (Farallon Islands; Santa 

 Barbara Islands); southward m winter to Lower California (Cape 

 Los Martires); accidental in Greenland (?) and Maine. 



Aim cirrhnta Pallas, Spic. Zool., i, fasc. v, 1769, 7, pi. 1 and pi. 2, figs. 1, 2, 3 

 (Kamchatka to Aleutian Islands). — Moschler, Journ. fiir Orn., 1856, 335 

 (Greenland). — Kittlitz, Denkw. Reise, ii, 1858, 205. — ^Bolau, Journ. fiir 

 Orn., 1880, 132 (coast e. Siberia). 



[Alca] cirrhata Gmelin, Syst. Nat., i, pt. ii, 1789, 553. — Latham, Index Orn., ii, 

 1790, 791.— BoNNATERRE, Tabl. Enc. Meth., i, 1790, 32, pi. 10, fig. 4, pi. 11, 

 fig. 1.— Gray, Hand-list, iii, 1871, 96, no. 10778. 



Alca (Mormon) cirrhata Bolau, Journ. fiir Orn., 1880, 132 (coast e. Siberia). 



Alca Mormon cirrhata Dorries, Journ. fiir Orn., 1888, 96 (e. Siberia). 



a Eleven specimens. 



& Nine specimens. 



