772 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Young. — Similar in coloration to adults but lacking the ornamental 

 head plumes or else having them very slightly developed; bill smaller, 

 much duller in color (dusky). 



Downy young. — Plain sooty grayish brown, paler on under parts, 

 especially on abdomen. 



Adult male.— Wing, 104-111 (107.2); tail, 27.5-34 (29.9); exposed 

 culmen, 7-10 (8.3) ; depth of bill at gonydeal angle, 7-7.5 (7.1) ; tarsus, 

 19.5-23 (20.9); middle toe, 22-25 (24.1).'^ 



Adult female.— Wing, 103.5-116 (109.1); tail, 27-30.5 (28.9); 

 exposed culmen, 9; depth of bill at gonydeal angle, 7-7.5 (7.4); 

 tarsus, 20-21 (20.4); middle toe, 24-24.5 (24.1).'' 



Aleutian Islands, Alaska (as far eastward an Unalaska), Com- 

 mander Islands, Kamchatka, and Kuril Islands, breeding; in winter 

 southward to northern Japan; St. Lawrence Island, Bering Sea? 



[Alca] pygmsea Gmelin, Syst. Nat., i, pt. ii, 1789, 555 ("Bird Island, between 

 Asia and America"; based on Pygmy Auk Pennant, Arctic Zool., ii, 1785, 

 513). 



Alca pygmaea Lichtenstein, Verz. Doubl., 1823, 89, in text. 



P[haleris] pygmaeus Gray, Gen. Birds, iii, 1848, 638. 



Simorrhynclus pygmseus Brandt, Melang. BioL, vii, 1869, 228. — Ridgway, Proc. 

 U. S. Nat. Mus., iii, 1880, 211 (Cat. N. Am. Birds, no. 749); Norn. N. Am. 

 Birds, 1881, no. 749.— Coues, Check List, 2d ed., 1882, no. 860.— Nelson, 

 Cruise "Corwin" in 1881 (1883), 116 (Aleutian Islands); Rep. N. H. Coll. 

 Alaska, 1887, 42 (Nearer Islands, Aleutian chain, breeding but not wintering; 

 Commander Islands, Kamchatka, breeding). — Stejneger, Naturen, 1884, 

 35, 55; Bull. U. S. Nat. Mus., no. 29, 1885, pi. 4, figs. 1, 2, pi. 5, figs. 3, 4 

 (Commander Islands); Proc. U. S. Nat. Mus., x, 1887, 118 (Commander 

 Islands); xxi, 1898, 274 (Kuril Islands, breeding).— Turner, Auk, ii, 1885, 

 159 (Attu Island, Aleutians, breeding); Contr. N. H. Alaska, 1886, 120, pi. 1 



« Seven specimens. 



^ Four specimens. 



Locality. 



MALES. 



Two adult males from Alaska (Unalaska and Atka 

 islands) 



Four adult males from Commander Islands, Kam- 

 chatka 



One adult male from Kuril Islands 



FEMALES. 



One adult female from Copper Island, Commander 

 group 



Two adult females from Bering Island, Commander 

 group 



One adult female from Kuril Islands 



Wing. 



104. 5 



107.6 

 111 



103. 



108. 5 

 116 



Tail. 



30.6 

 31 



29 

 30.5 



Ex- 

 posed 

 cul- 

 men. 



Depth 

 of bill 

 at base 



of 

 gonys. 



7 

 7.5 



7.2 

 7.3 



Tar- 

 sus. 



19.7 



20.9 

 23 



20 



20.2 

 20.5 



Middle 

 toe. 



22. 7 

 24.5 



