1(36 MR. H. SAUNDERS ON THE LARINjE. [Feb. 5, 



L. hutchinsii I consider to be an immature L. glaucus in the stage 

 where the mottled brown of immature plumage has passed away, and 

 the pearl-grey mantle has not yet begun to show. This stage lasts 

 but a short time, which will account for the fact that this supposed 

 species has so rarely been obtained ; but I have always observed in 

 voung specimens in captivity that at this stage they are nearly, and 

 sometimes quite, white. A fine example in this state, obtained off 

 Japan by Capt. St. John, H.M.S. ' Sylvia,' is in the Marquis of 

 Tweeddale's collection. Mr. Collett obtained one in Norway in 

 September 1871 ; and several have been recorded from America. 



The feet and legs in adults of this Gull are bright flesh-pink, and 

 not lemon-yellow as depicted by an extraordinary freak of the 

 colourist in Mr. Dresser's ' Birds of Europe.' 



5. Larus leucopterus, Faber. 



Larus argentatus, E. Sabine, Tr. Linn. Soc. xii. p. 546 (nee 

 auctt.). 



Larus leucopterus, Faber, Prod. Isl. Orn. p. 91 (1822) ; Sw. & 

 Rich. F. Bor.-Am. ii. p. 418 (1831) ; Schl. Mus. P.-Bas, Lari, p. 5 

 (1863); Dall. & Bann. Tr. Chic. Ac. i. 1869, p. 304 (Alaska and 

 Lower Yukon); Coues, B. N.W. Am. p. 622 (1874) ; Dresser, B. 

 of Europe, pt. xlix (1876). 



" Larus gto.ucoides, Temm." Meyer, Taschenb. hi. p. 197 (1822); 

 Boie, Isis, 1822, p. 562. 



Larus glaucoides, Temm. PI. Col. 77 e livr. Introd. Larus (1828). 



Larus islandicus, Edmonst. Mem. Wern. Soc. iv. p. 506 (1823) 

 (nee Edmonst. op. cit. p. 185). 



Larus arcticus, Macgill. Mem. Werner. Soc. v. no. xiii. p. 268 

 (1824) (large specimen). 



Larus minor, Brehm, Vog. Deutschl. p. 736 (1831). 



Lar aides glaucoides, Brehm, op. cit. p. 744. 



Laroides leucopterus, Brehm, op. cit. p. 745 ; Bruch, J. f. Orn. 

 1855, p. 281. 



Laroides subleucopterus, Brehm, op. cit. p. 746. 



Glaucus leucopterus, Bruch, J. f. Orn. 1853, p. 101. 



Glaucus glacialis, Bruch, op. cit. p. 101. 



Larus chalcopterus, Licht. Nomencl. Av. Mus. Berol. p. 99 

 (1854), sine descr. (type examined, H. S.). 



? Laroides chalcopterus (Licht.), Bruch, J. f. Orn. 1855, p. 22. 



Laroides glacialis, Bruch, op. cit. 1855, p. 282. 



Leucus chalcopterus, Bp. Consp. Av. ii. p. 216 (1857). 



Leucus arcticus, Bp. op. cit. p. 216. 



Leucus leucopterus, Bp. op. cit. p. 217. 



Hab. Even more thoroughly arctic, during the breeding-season, 

 than L. glaucus ; straggling southward in winter as far as the coast 

 of France. It is not even authenticated as breeding in Iceland or 

 Spitzbergen ; but it does so within the arctic circle from Greenland 

 to Behring's Straits, It also breeds in Alaska ; and I have examined 

 a specimen which was obtained in Japan by Capt. Blakiston. 



