68 . lAEID^. 



Mus. Godeffr. Hft. viii. p. 41 (1875 : same loc.) ; Tacz. J. f. 0. 

 1873 p. Ill; id. op. cit. 1874, pp. 334, 337; id. op. cit. 1875, 

 p. 257 ; id. Bull. Soc. Zool. Fr. 1876, p. 261 (E. Siberia) ; id. J.f. O. 

 1886, p. 202 (Ussuria) ; Sau?iders, P. Z. S. 1876, p. 649 (revision); 

 David Sr Oustal. Ois. Chine, p. 526 (1878) ; Seebohm, Ibis, 1879, 

 p. 23 (Kuril Is.); Finsch, P. Z. S. 1879, p. 15; id. Ibis, 1881, 

 p. 540 (ad.. New Britain) ; Blakist.Sf Pryer, Tr. Asiat. SocJapaUy 

 viii. (1880) p. 188, op. cit. x. (1882) p. 103 ; Legge, B. Ceylcni, pt. iii, 

 p. 1016 (1880) ; Salmd. Ann. Mus. Civ. Genova, xviii. p. 407 

 (1882) ; id. Orn. Papuasia, iii. p. 439 (1882 : Halmahera) ; Tacz. 

 Bull. Soc. Zool. Fr. 1882, p. 397 (Kamschatka) ; id. op. cit. 

 1885, p. 477 (Ussuria) ; Blakist. ^- Pryer, Amend. List B. Jap. 

 p. 10, no. 63 (1884) ; W. 0. Grant, P. Z. S. 1888, p. 204 (Solomon 

 Is.) ; Tristr. Cat. Coll. B. p. 9 (1889) ; Seebohm, B. Japan. Emp. 

 p. 296 (1890) ; Heine St Reichenow, Nomencl. Mus. Hein. p. 354 

 (1890) ; Hartert, Katal. Vogelsamml. Seuckenb. p. 239 (1891) ; Be 

 la Touche, Ibis, 1892, p. 503 (Foochow) ; Wiglesiv. Abh. zool. Mus. 

 Dresd. 1890-91, no. vi. p. 74 (1892). 

 ? Hydrocecropis camtchatika, Boie, Isis, 1844, p. 179. 

 Hydrocecropis longipennis, Boie, Isis, 1844, p. 179. 

 Sterna camtscliatika, Kittl. Denkw. Reise, i. p. 322, & ii. p. 208 

 (1858 : Kamschatka) : Stejneger, Naturen, 1884, p. 8 ; id. Expl. 

 Coinmander Is. p. 83 (188o) ; id. Pr. U.S. Nat. Mus. xiv. p. 490 

 (1891 : Hitachi, Japan). 

 Sterna glacialis, Kittlitz, Benkw. Reise, i. p. 322 (1858). 

 Sterna melanorhyncha, Finsch, Neu-Guinea, p. 184 (^1865: nee Gould). 

 ? Sterna frontalis, Finsch, Vog. Siidsee, pp. 21 & 540 (1884 : New 

 Britain). 

 Adult in hreecling-pluma(je. Similar to S. macr^ira, but with a 

 slightly darker tint on the upper parts, vinaceous grey on the 

 underparts, a black biU, and blackish feet ; the stripe inside the 

 shafts of the outer primaries quite as wide as in S. jluviatilis. 

 Total length 14-5 inches, culmen 1-6, wing 10-6, tail 7-1, depth of 

 fork 4-5, tarsus 0-75, middle toe and claw 0-9. 



Adult in winter. Forehead flecked with white, otherwise similar. 

 Immature. Like that of S. Jluviatilis, from which it can hardly be 

 distinguished except by the colour of the bill and feet, and the 

 somewhat smaller size and more delicate shape of the latter. 



Although young birds are not easily recognized, yet S. longipennis 

 is an excellent species, intermediate between S. Jluviatilis and 

 S. macrura ; resembling the former in its vinaceous tint and the 

 latter in the pure white rump and long tail-streamers of the adult. 



Hah. Lake Baikal, Amur-land, Kamschatka, Japan, China coast, 

 Malacca, Ceylon, Papuasia to New Guinea. 



a, b. Vix ad. st. Kamschatka. Pui-chased. 



c. Ad. sk. Kamschatka. H. Saunders Coll. 



d. Ad. sk. Kamschatka. Seebohm CoU. 



e. Ad. sk. Kamschatka, June. Capt. Blakiston [P.]. 



f. Ad. sk. Lake Baikal, June. H. Saunders Coll. 



g. S ad. sk. Amur-land {B. Maack). H. Saunders Coll. 

 h. Ad. sk. Kobe, Japan, May (Ouston 4" H. Saunders Coll. 



Snotv). 

 i-m. Ad. sk. Kobe, Japan, May {Ouston ^- Seebohm Coll. 



Snoiv). 



