BIRDS OF NOETH AXD MIDDLE AMERICA. 511 



dusky, the mandible light reddish (brownish in dried skins) with 

 terminal third or fom'th 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.— Wmg, 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 alcutica Baikd, Trans. Chicago Acad. Sci., i, 1869, 321, pi. 31, fig. 1 (Kodiak 

 Island, Alaska; coll. U. S. Nat. Mus.). — Dall and Bannister, Trans. Chicago 

 Ac. Sci., i, 1869, 307 (Kodiak). — Coues, (heck List, 1873, no. 572; 2d ed., 

 1882, no. 803; Birds Northwest, 1874, 696 (monogr.). — Saunders, Froc. 

 Zool. Soc. Lond., 1876, 664 (monogr.); Joiirn. Linn. Soc, xiv, 1878, 403, 405 

 (range"): Cat. Birds Brit. Mus., xxv, 1896, 98 (St. Michaels, Alaska; Inuboe, 

 off Yedo, Japan).— RiDG WAY, Bull. Nutt. Orn. Club, iii, 1878, 38 (St. 

 Michaels); Proc. U. S. Nat. Mus., iii, 1880 (Cat. N. Am. Birds), 208; Norn. 

 N. Am. Bii-ds, 1881, no. 689.— Nelson, Cruise 'Corwin' in 1881 (1883), 109 

 .(Kodiak Island to Bering Straits; St. Lawrence Bay, Siberia); Rep. Nat. Hist. 

 Coll. Alasl^a, 1887, 59 (Kodiak; St. Michaels and shores of Norton Sound; St. 

 Lawrence Bay, e. Siberia; habits, etc.). — Baird, Brewer, and Ridgway, 

 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.— Seebohm, Birds 

 Japan. Emp., 1890, 299 (Inuboe, Japan).— Allen, Auk, x, 1893, 123 

 (Alaska). — Thayer and Bangs, Auk, xxxiii, 1916, 44 (Saghalin Island, 

 Japan, June).— Hersey, Smithson. Misc. Coll., Ixvi, no. 2, 1916, 15 (off 

 Cape Nome, and land localities not spec^ified). 

 [Sterna] aleuiica Gray, Hand-list, iii, 1871, 118, no. 11037.— Coues, Key N. Am. 

 Birds, 1872, 322.— Sharpe, Hand-list, i, 1899, 136.— Forbes and Robinson, 

 Bull. Liverp. Mus., ii, no. 2, 1899, 55 (St. Michaels). 

 S[terna] aleutica Coues, Key N. Am. Birds, 2d ed., 1884, 768. ^Ridgway, Man. 



N. Am. Birds, 1887, 45. 

 Sterna camtschalica (not of Pallas) Finsch, Abh. nat. Ver. Brem., ui, 1882, 85. 



a The young of Sterna aleutica may be very easily distinguished from that of 5. para- 

 disxa — the only other small Tern associated with it in Alaska — bj- the following differ- 

 ences of coloration; (1) The distinctly cinereous rump and upper tail-covert.s; (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 vrith any other specie? of the genus. 



^ Five specimens. 



<' Four specimens. 



