18/8.] „ MR. H. SAUNDERS ON THE LARIN.E. 167 



6. Larus glaucescens, Licht. 



Glaucus glaucescens (Licht.), Bruch, J. f. Orn. 1853, p. 101 (type 

 examined, H. S.). 



" Glaucus glaucopterus, Kittlitz," Bruch, J. f. Orn. 1853 n 

 101. ' 



Larus glaucopterus, Licht. Nomencl. Av. Mus. Berol. p. 99, sine 

 descr. (1854), Behring's Straits, Chamisso (type examined, H. S.). 



Laroides glaucescens, Bruch, J. f. Orn. 1855, p. 281. 



Leucus glaucescens, Bp. Compt. Rend. xlii. (1856) p. 770 : Consn 

 Av. ii. p. 216 (1857). 



Larus glaucescens, Licht. j Lawr. B. N. Am. p. 842 (1858); Coues 

 Proc. Philad. Ac. 1862, p. 295 ; id. B. N.W. Am. p. 622 ; Swinhoe^ 

 Ibis, 1874, p. 165 (Japan). 



Larus chalcopterus, Lawr.B. of N. Am. p. 843, 1860; Coues, Proc 

 Philad. Ac. 1862, p. 295 (nee Licht.). 



Hab. Pacific coast of North America up to Behring's Straits, and, 

 on the Asiatic side, Kamtschatka, and as far south as Hakodadi, 

 Japan, whence 1 have seen a specimen obtained by Capt. Blakiston. 



This apparent link between the large Gulls with white primaries 

 and those with barred primaries may be roughly described as a 

 Herring-Gull with the black portion of the primary-pattern nearly 

 washed out. It is quite unmistakable. The change's of plumage in 

 its progress to maturity show, however, that its relationship to L. 

 glaucus is closer than to L. argentatus. 



7- Larus argentatus, Gm. 



Larus fuscus, Penn. Brit. Zool. ii. p. 131 (1768), nee Linn. ; Mont. 

 Orn. Diet. i. (1802). 



Larus argentatus, Gm. Syst. Nat. i. p. 600 (1788), ex Briinn. ; 

 Schl. M. P.-Bas, Lari, p. 16"(includes allies); Gundlach, J. f. Orn. 

 1857, p. 236 (Cuba) ; B. duBocage, Jorn. Soc. Lisb. 1868, pp. 149, 

 330 (Angola) ; Hartlaub, Syst. Orn. W.-Afrik. p. 251 (1857), 

 Senegal ; Dresser, B. of Europe, pt. xxii. (Oct. 1873) ; Coues, B. 

 N.W. Am. p. 625, 1874. 



Larus marinus, var. ft, Latham, Iud. Orn. ii. p. p. 814 (1790). 



Lams glaucus, Retzius, F. Suec. i. p. 156 (1800), nee Briinn. ; 

 Meyer & W. Taschenb. ii. p. 471 (1810). 



Larus cinereus, Leach, Syst. Cat. Brit. Mus. p. 40. (1816). 



Larus argentatoides, Brehm, Beitr. Vcigelkunde. iii. pp. 791, 799 

 (1822). 



Larus argenteus, Macgill. Mem. Wern. Soc. v. p. 264 (1824). 



"Larus argentatoides (Bonap.)," Sw. & Richards. F. Bor.-Am. 

 Birds, p. 417 (1831), uec Brehm, nee Bonap. 



Laroides major, argentatus, argenteus, argentatoides, et argenta- 

 ceus, Brehm, Vog. Deutschl. pp. 738-743 (1831). 



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



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



Larus marinus, Gundl. J. F. Orn. 1857, p. 236 ; Lembeve, Aves, 

 de Cuba, p. 122 (1850), cf. Gundl. J. f. Orn. 1871, p. 291. 



