BIRDS OF NORTH AND MIDDLE AMERICA. 619 



but with the subterminal black band incomplete, sometimes obsolete 

 or nearh' so; remaining (proximal) primaries without any black; bill 

 yellow, the mandible with a subterminal lateral spot of red; legs and 

 feet pale flesh color (in life). 



Adults in mw^^r.-- -Similar to summer adults, but piloum and hind- 

 neck broadly streaked or longitudinally clouded with brownish gray 

 or grayish brown. 



Adult male. — -Wing, 471; tail, 195; exposed culmen, 64; tarsus, 

 62.5: middle toe, 62.5.« 



Adult female. — Wing, 435; tail, 159; exposed culmen, 55; tarsus, 

 62; middle toe, 55.'' 



Ai'ctic coast of Siberia, from Taimyr Peninsula eastward to Bering 

 Straits, breeding at Kolyma delta, on New Siberian Islands, Cape 

 Kibora Island, Cape Bolshaja, etc.; during migration eastward to 

 Bering Sea, coast of Alaska (Choris Peninsula; Kotzebue Sound; St. 

 Michaels; Ulaga Pass, near Unalaska), and southward along iVsiatic 

 coast to Kamchatka (Avacha Bay), Korea, Japan (Tsusuma Island; 

 Sakhalin Island, June; Hakodate), China (lower Yangtse River; Kiu. 

 Kjang; Foochow; Pakhoi; Amoy; Chefoo), and Bonin Islands; also 

 to coast of California (Ventura County) ? 



Larus argentaius (not of Pontoppidan) Middendorff, Heis. Sibir., Zool.. 1851, 

 242, part.— KiTTLiTz, Denkw., i, 1858, 330; ii, 1858, 201, 225.— Swinhoe, 

 Ibis, 1861, 345 (n. China).— Radde, Reis. Sibir., Vog., 1863, 383.— Bunge, 

 Mel. Biol., xii, 1884, 47 (Lena delta, Siberia). — Allen, Bull. Am. Mus.. 

 N. H., xxi, 1905. 226 (Novo Marinsk, n. e. Siberia). 



Larus argentatus var. cachinnnns (not Larus cacJiinnans Pallas) Schrenck. Reis. 

 Amur)., i, 1859, 504. 



Larus cachinnans Homeyer, Journ. fiir Orn., 1870, 436 (e. Siberia). — ^Saunders 

 Proc. Zool. Soc. Lond., 1878, 169, part. — David and Oustalet, Ois. Chine, 

 1878, 519.— Ridgway, Proc. U. S. Nat. Mus., iii, 1880 (Cat. N. Am. Birds), 

 207; Nom. N. Am. Birds, 1881, no. 667.— Coues, Check List, 2d ed.. 1882, 

 no. 775.— Nelson, Cruise 'Corwin'in 1881 (1883), 152 (Norton Sound, etc., 

 Alaska; Plover Bay, Siberia); Rep. N. H. Coll. Alaska. 1887. 54 (Siberian 

 coast, Bering Sea; Kotzebue Sound to mouth of Yukon River, Alaska). — 

 Seebohm, Ibis, 1884, 270 (Kiu-Kiang, China); 1890, 105 (Bonin Islands); 

 1892, 96 (Tsusimct Island, Japan); 1893, 53 (Liu Kiu Islands); Birds Japan. 

 Emp., 1890, 291.— Murdoch. Exped. Point Borrow, 1885, 200 (Plover Bay, 

 Siberia). — Baird, Brewer, and Ridgway, Water Birds N. Am., ii, 1884, 

 240. — American Ornithologists' Union, Check List, 1886, no. 52. — Ever- 

 MANN, Auk, iii, 1886, 88 (Ventura Co., California, in winter). — Giglioli and 

 Salvadori, Proc. Zool. Soc. Lond., 1887, 592 (Vladivostok, e. Siberia; Korea; 

 crit.) — Taczanowski, Proc. Zool. Soc. Lond., 1888, 458 (Ginzan, Korea, 

 Feb.).— Styan, Ibis, 1891, 508 (lower Yangtse River, China). — De la 

 Touche, Ibis, 1892, 501 (Foochow, etc., China, in winter). — Hartlaub, 

 Abh. Nat. Ver. Bremen, xii, Heft ii, 1892, 334 (Pakhoi, China). 



'^ One specimen, from Kanagawa, Japan (Mar. 29). 



^ One specimen from Formosa Channel. China. 



Ten adults of undetermined sex measure as follows: Wing. 385-463 (424.3); tail 

 (live specimens), 164-179 (171); exposed culmen, 48.3-56 (52. 3j; tarsus, 54.6-63.5 

 (60.5); middle toe, 40.6-60 (52.1). 



