BIRDS OF NORTH AND MIDDLE AMERICA, 511 
dusky, the mandible light reddish (brownish in dried skins) with 
terminal third or fourth dusky; legs and feet light reddish.¢ 
Downy young.—Upper parts rather light sooty brown, varying to 
buffy brown, coarsely mottled or marbled with blackish, the mark- 
ings smaller and more sharply defined on head, where the anterior 
portion of crown and the superciliary region are sometimes immacu- 
late; forehead, chin, throat, and sides of neck dark sooty grayish, 
the remaining under parts lighter sooty grayish. 
Adult male.—Wing, 261-280 (271.4); tail, 121-194 (166.4); exposed 
culmen, 30-34 (32.7); tarsus, 16.5-18 (17.1); middle toe, 20-22 (21.1).° 
Adult female.—Wing, 252-275 (263.2); tail, 103.5-162 (138.2); 
exposed culmen, 30-35 (33.2); tarsus, 17-18.5 (17.9); middle toe, 
20.5-22 (21).° 
Western Alaska, from shores of Norton Sound to Kodiak Island; 
St. Lawrence Bay, northeastern Siberia; in winter south to northern 
Japan (Inaboya, off Yedo; Saghalin Island). 
Sterna aleutica Barry, Trans. Chicago Acad. Sci., i, 1869, 321, pl. 31, fig. 1 (Kodiak 
Island, Alaska; coll. U.S. Nat-Mus.).—Daut and Bannister, Trans. Chicago 
Ac. Sci., i, 1869, 307 (Kodiak).—Covss, Check List, 1873, no. 572; 2d ed., 
1882, no. 803; Birds Northwest, 1874, 696 (monogr.).—SaunpgErs, Proc. 
Zool. Soc. Lond., 1876, 664 (monogr.); Journ. Linn. Soc., xiv, 1878, 403, 405 
(range); Cat. Birds Brit. Mus., xxv, 1896, 98 (St. Michaels, Alaska; Inuboe, 
off Yedo, Japan)—Ripaway, Bull. Nutt. Orn. Club, iii, 1878, 38 (St. 
Michaels); Proc. U. 8. Nat. Mus., iii, 1880 (Cat. N. Am. Birds), 208; Nom. 
N. Am. Birds, 1881, no. 689.—Netson, Cruise ‘Corwin’ in 1881 (1883), 109 
(Kodiak Island to Bering Straits; St. Lawrence Bay, Siberia); Rep. Nat. Hist. 
Coll. Alaska, 1887, 59 (Kodiak; St. Michaels and shores of Norton Sound; St. 
Lawrence Bay, e. Siberia; habits, etc.)—Bairp, Brewer, and Riweway, 
Water Birds N. Am., ii, 1884, 307.—Turner, Contr. Nat. Hist. Alaska, 1886, 
127 (St. Michaels; habits, etc.) AMERICAN ORNITHOLOGISTS’ Union, Check 
List, 1886, and 2d ed., 1895, no. 73; 3rd ed., 1910, p. 45—SzzBoum, Birds. 
Japan. Emp., 1890, 299 (Inuboe, Japan).—Atben, Auk, x, 1893, 123 
(Alaska) —Tuayer and Banes, Auk, xxxiii, 1916, 44 (Saghalin Island, 
Japan, June).—Hersry, Smithson. Misc. Coll., Ixvi, no. 2, 1916, 15 (off 
Cape Nome, and land localities not specified). 
[Sterna] aleutica Gray, Hand-list, iii, 1871, 118, no. 11037.—Covrs, Key N. Am. 
Birds, 1872, 322.—_Suarrz, Hand-list, i, 1899, 136.—Forses and Rosinson, 
Bull. Liverp. Mus., ii, no. 2, 1899, 55 (St. Michaels). 
S[terna] aleutica Cours, Key N. Am. Birds, 2d ed., 1884, 768.—Ripeway, Man. 
N. Am. Birds, 1887, 45. 
Sterna camtschatica (not of Pallas) Finscu, Abh. nat. Ver. Brem., iii, 1882, 85. 
@ The young of Sterna aleutica may be very easily distinguished from that of S. para- 
disza—the only other small Tern associated with it in Alaska—by the following differ- 
ences of coloration: (1) The distinctly cinereous rump and upper tail-coverts; (2) the 
pure white, instead of uniform blackish, outer webs of the lateral rectrices; (3) the 
deep smoke brown hue of the forehead, crown, nape, and sides of the breast; (4) the 
broad white anterior border to the forearm; (5) the dusky stripe near the edge of the 
inner webs of the primaries; and (6) the much darker general coloration, and especially 
the blackish dorsal region, with wide, deep ochraceous borders to the feathers. The 
adult needs no comparison with any other species of the genus. 
5 Five specimens. 
¢ Four specimens. 
