15. LARus. 285 



[wing figured and iiaiuo transposed] (1869) ; Dull i^- liann. Tr. 



Chic. Acad. i. p. 304 (18G9: Alaska): Sivinhoe, Ibis, 1874, p. 165 



(liakodadi) ; Baird, t. c. p. 842 ; Coups, Key N. Anier. B. p. 812 



(1872); Gray, Hund-l. B. iii. p. 113, no. 10965 (1871: part.); 



Dall, Avif. Aleut. Is. Unal. ectstw. p. 8 (1873) ; id. Avif. Aleut. 



Is. West. Unal. p. 9 (1874); Coues, B. N.-West, p. 622 (1874); 



8winh. Ibis, 1874, p. 163 (N. Japan) ; Blakist. ^- Fryer, Ibis, 1878, 



p. 217 (.lapan) ; Saunders, P. Z. *'. 1S78, p. 167 (revision Larinffi) ; 



id. Journ. Linn. Soc. xiv. p. 395 (1878 : distribution) ; Seebohm, 



Ibis, 1879, p. 23 (Japan) ; Blakist. ^- Fryer, Tr. As. Soc. Jap. viii. 



p. 189 (1880); iid. op. cit. x. p. 103 (1882) ; Rid(jio. Bull. U.S. 



Nat. Mus. no. 21, p. 51 (1881) ; Bean, Fr. U.S. Nat. Mus. 1882, 



p. 168 (Alaska) ; Coues, Check-l. N. Amer. B. p. 120 (1882) ; 



Stejn. Fr. U.S. Nat. Mus. 1883, p. 70 ; Baird, Breiver, ^ Ridg'w. 



Water-B.N.Amer. ii. p. 223 (1884); Coues, Key N. Amer. B. 



2nd ed. p. 741 (1884) ; Stejn. Bull. U.S. Nat. Mus. no. 29, p. 62 



(1885: Commander Is.) {A. O. U. Check-l. N. Amer. B. p. 87 



(1886); Turner, Contr. N. H. Alaska, p. 125 (1886); Ridgw. 



Man. N. Amer. B. p. 27 (1887) ; Stejn. Fr. U.S. Nat. Mus. 1887, 



p. 119 (Commander Is.) ; Nelson, Rep. N. H. Alaska, p. 53 (1887) ; 



Falmhi, Veya-Exped. Vetensk. Bd. v. p. 369 (1887: Pitekai) ; 



Seehohm, B. Japan. Emp. p. 290 (1890); Allen, Auk, 1893, 



p. 123 (distribution ) ; A. K. Fisher, Rep. U.S. Eep. Agric. no. 7, 



p. 13 (1893 : San Simeon, Cuba, 35= 30' N.). 

 Glaucus glaucopterus(?), .6re<cA, c/"./. O. 1853, p. 101 (Kamtschatka, 



? Kittlitz). 

 Glaucus glaucescens, Bruch, J. f. O. 1853, p. 101 {ex Licht.*). 

 Larus glaucopterus, i/cA^. (? Kittlitz) Nomencl. Av. p. 99, sinedescr. 



(1854: Bering Straits, Chamhsof). 

 [?] Laroiides glaucopterus, Bp. Naum. 1854, p. 211 (Kamtschatka). 

 Laroides glaucescens, Bp. Naum. 1854, p. 212 ; Bruch, J.f. 0. 1855 



p. 281. 

 Leucus glaucescens, Bp. C. R. xlii. p. 770 (1856) ; id. Consp. Av. ii 



p. 216 (1857). 

 Larus chalcopterus, Baird, Cassin, ^ Lawr. {nee Licht.) B. N. Am. 



p. 843 (1860); Coues, Froc. Fhilad. Acad. 1862, p. 295: Gray 

 Hand-l. B. iii. p. 113, no. 10964 (1871). 



Adult male, in breeding-plumage. Head, neck, tail, and under- 

 parts white ; mantle bluish grej- (much as in L. argentatus) ; 

 scapulars, secondaries, and primaries broadly tipped with white ; 

 the foundation-pattern of the quills two shades of ashj' grey ; the 

 1st quill either white for fully 2 inches terminally, or with a dark 

 subterminal bar, which is often confined to the inner web, but some- 

 times divides the white into a " mirror "' and " tip," according to age ; 

 2nd with a white subterminal spot on each side of the shaft, which 

 remains grey, while the inner web at its junction with the spot inclines 

 to white : 3rd quill without a distinct spot, but whitish at the apex of 

 the ' wedge ' of the grey inner web {see cut, p. 286 ) ; 4th pale grey 

 on the greater part of both webs, so that the darker grey sjiows as 

 a distinct bar ; 5th with smaller dark bar surmounted by white, 

 which blends with the grey of the basal portion ; 6th simUar, but 



* Example in Mainz Museum examined. 

 t Example in Berlin Museum examined. 



