BIRDS OF NORTH AND MIDDLE AMERICA. 619 
but with the subterminal black band incomplete, sometimes obsolete 
or nearly 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 winter.—Similar to summer adults, but pileum 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.° : 
Arctic 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 Asiatic 
coast to Kamchatka (Avacha Bay), Korea, Japan (Tsusuma Island; 
Sakhalin Island, June; Hakodate), China (lower Yangtse River; Kiu- 
Kiang; Foochow; Pakhoi; Amoy; Chefoo), and Bonin Islands; also 
to coast of California (Ventura County) ? 
Larus argentatus (not of Pontoppidan) Mippenporrr, Reis. Sibir., Zool., 1851, 
243, part.—Krrtuirz, Denkw., i, 1858, 336; ii, 1858, 201, 225,—Swinuor, 
Ibis, 1861, 345 (n. China).—Rappsz, Reis. Sibir., Vég., 1863, 383.—Buneg, 
Mél. Biol., xii, 1884, 47 (Lena delta, Siberia).—Attzen, Bull. Am. Mus.; 
N. H., xxi, 1905, 226 (Novo Murinsk, n. e. Siberia). 
Larus argentatus var. cachinnans (not Larus cachinnans Pallas) Scurencx, Reis. 
Amurl., i, 1859, 504. 
Larus cachinnans Homeyer, Journ. fiir Orn., 1870, 436 (e. Siberia). —SaunpERs | 
Proc. Zool. Soc. Lond., 1878, 169, part.—Davip and OvusrTa.et, Ois. Chine, 
1878, 519.—Ripeway, Proc. U.S. Nat. Mus., ili, 1880 (Cat. N. Am. Birds), 
207; Nom. N. Am. Birds, 1881, no. 667.—Covrs, Check List, 2d ed., 1882, 
no. 775,—NeELSoN, 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).— 
SereBoum, Ibis, 1884, 270 (Kiu-Kiang, China); 1890, 105 (Bonin Islands); 
1892, 96 (Tsusima Island, Japan); 1893, 53 (Liu Kiu Islands); Birds Japan. 
Emp., 1890, 291.—Murpocu, Exped. Point Barrow, 1885, 200 (Plover Bay, 
Siberia).—Barrp, Brewer, and Riwaway, Water Birds N. Am., ii, 1884, 
240.—AMERICAN OrniTHOLOGISTS’ Unton, Check List, 1886, no. 52.—Evsr- 
mann, Auk, iii, 1886, 88 (Ventura Co., California, in winter).—G1eLio11 and 
Satvaporl, Proc. Zool. Soc. Lond., 1887, 592 (Vladivostok, e, Siberia; Korea; 
crit.)—Taczanowskl, Proc. Zool. Soc. Lond., 1888, 458 (Ginzan, Korea, 
Feb.).—_Styan, Ibis, 1891, 508 (lower Yangtse River, China).—Dr La 
ToucuE, Ibis, 1892, 501 (Foochow, etc., China, in winter).—Harriaus, 
Abh, Nat. Ver. Bremen, xii, Heft ii, 1892, 334 (Pakhoi, China). 
@ One specimen, from Kanagawa, Japan (Mar. 29). 
6 One specimen from Formosa Channel, China. 
Ten adults of undetermined sex measure as follows: Wing, 385-463 (424.3); tail 
(five specimens), 164-179 (171); exposed culmen, 48.3-56 (52.3); tarsus, 54.6-63.5 
(60.5); middle toe, 40.6-60 (52.1). - 
