15. LARTJS. 



271 



the mantle is, perhaps, of a darker and bluer grey. Total length 

 about 24 inches, culmen 2-9, wing 18, tail 7*75, tarsus 2-75, middle 

 toe with claw 2'G. 



The female is smaller and less robust. 



Adult in ivinter. Similar, but the head and neck streaked with 

 ash-brown, as in L. argentatus. 



Immature and Young go through the same phases as the two 

 preceding species. 



Hah. Arctic coast of Siberia, from the Taimyr Peninsula east- 

 ward, including the Liakoff Islands, to both sides of Bering Strait 

 and Sea, but chiefly along the Asiatic side, Kamtschatka, the Sea of 

 Okhotsk, &c. ; southward by Japan and China coasts as far as 

 Formosa and the Bonin Islands in winter. 



Ohs. It will be seen that L. argentatus, L. cacliinnans, and L. vegce 

 are very closely allied. There appears, however, to be a somewhat 

 important break of continuity : L. argentatus stopping at the \Vhite 

 Sea, and no large Gull with black-patterned primaries being found 

 to the eastward, till the Taimyr Peninsula is reached. 



a. (S juv. sk. 



b. Imm. sk. 



c. Imm. sk. 



d. Juv. sk. 



e-ff. Ad., imm., et 



juv. sk. 

 h-o. Ad., imm., et 



juv. sk. 

 p. 2 imm. sk. 



(J. cJ ad. sk. 



r, s. Ad. et juv. sk. 

 t-v. (S ad. ; 7V, x. $ 

 imm. ; y. Juv; sk. 



z, a. Ad. sk. 



//. Ad. sk. 

 c'. S vix ad. sk. 

 d'. 2 juv. sk. 

 e'. (S ad. sk. 

 /. Juv. sk. 



Soutli-west Manchuria. 

 ChefoG, N. China, Jan. 



{Commr. S. J. Mugge- 



ridge). 

 Shansrhai, March {R. tSwin- 



hoe). 

 Kiukiang, Yangtse, Nov. 

 Poyang Lake, Yangtse, 



Jan. 

 Amoy, Jan.-March {R. S.). 



H. M. James, Esq. [P.]. 

 H. Saunders Coll. 



Seebohm Coll. 



F. W. Styan, Esq. [P.]. 

 F. W. Styan, Esq. [P.]. 



Chichi-shima, 

 April. 



Tsu-shima, Corea Channel, 

 Feb. (P. A. Hoist). 



Nagasaki, S. Japan. 



Yedo Gulf, Japan, Jan.- 

 March (Admiral St. 

 John and G. Stephen). 



Yokohama, Japan [H. 

 Prger). 



Kobe , Japan , M.arch.(Snozv) . 



Hakodati, Maj'. 



Yezo (Admiral St. John). 



Mouth of the Amur. 



" N.W. coast America." 



Seebohm and H. Saun- 

 ders Colls. 

 Peel Isd., Seebohm Coll. 



Seebohm Coll. 



F. Ringer, Esq. [P.]. 

 II. Saunders Coll. 



Capt. Blakiston and 



Seebohm Colls. 

 H. Saunders Coll. 

 Capt. Blakiston [P.]. 

 Tweeddale Coll. 

 Seebohm CoU. 

 Capt. Kellett, R.N. [P.]. 



35. Larus audouini. 



? Larus quadricolor, Scop. Ann. i. Hist. Nat. p. 81 (1769). 



Larus atriciUa (nee Linn.), Natt. (part.), Temm. Man. d'Orn. p. 779 

 (1820) ; cf. Schl. Rev. Crit. p. 114 (1844). 



Larus audouini, rai/raudeau, Ann. Sci. Nat. viii. p. 462 (1826); 

 Werner, Atlas, Palmipedes, pi. 23 (1828) ; Temm. IH. Col. livr. 480 

 (1829) ; Gould, B. Eur. v. pi. 438 (1837) ; Bp. Comp. List B. 



