LARIDiE — THE GULLS AND TERNS. 225 



The great Burgomaster Gull is an Arctic species which occa- 

 sionally visits Lake Michigan in winter. It is the largest of 

 the gulls, excepting only the Black-backed Gull, or ''Saddle- 

 back" (Z. marni'ix). 



In Greenland, where it is almost a resident species, a few in- 

 dividuals (chiefly young birds) being seen in the very coldest 

 weather, it is said to pirate upon the eiders (Somateria mollis- 

 sima horeaUs), often compelling them to surrender the mussels 

 which they have brought up from the bottom of the bays or 

 fiords. There, "the principal breeding place of this gull in the 

 vicinity of Ivigtut is close by the open sea, near the mouth of 

 the fiord, where they congregate in considerable numbers. In 

 August the young birds assemble in the fiord, especially near 

 the narrow channels, as at Karsuk and Ellerslie, and feed dur- 

 ing that month and the next on the berries of Empetrum ni- 

 grum. At that season they are easily shot, and their flesh is of 

 a very savory flavor. The breasts of the young of all species 

 of gull are eaten here as a delicacy." * 



Larus leucopterus Faber. 



ICELAND GULL. 

 Popular synonym. White-winded Gull. 



Larus argentatus Sabine, Trans. Linn. Soc. xii, 1818. 546 (Dot of Bru.vn. 1764). 

 Larus leucopterus Faber, Prodr.Isl. Orn.1822. 91.-Sw. & Rich. F. B.-A. ii, 1831, 41S.-Nuit. 



Man. ii, 1831, 3H5— Aud. Orn. Biog. iii, 1835, 553. pi. 282; Synop 1839, 327: 15. Am. vii.1814. 



159. pi. 417— Lawk, in Baird's B. N. Am. 1858, 843 — Baird, Cat.'N. Am. B. 1S59. No. 658. 



-Coues, Key, 1872, 311; Cho.-k List, 1873, No. 511; 2d ed. 1882, No. 769; B. X.W.I 374 



622-Ridgw. Noni. N. Am. B. 1881, No. 661; Man. N. Am. B. 1887, 26— B. B. & R. Water 



B. N. Am. ii. 1834, 216.— A. O. U. Chock Li-t, 1886, No. IS. 

 Larus arclicus Macgill. Mem. Wern. Soc. v. 1824,-08. 

 Laru* glaucoides "Temm." MEYER.Tasehenb. Vog. Deutsohl. iv,lS22.197.-TEMM. PL Col. 77.> 



livr. Intro. i. Larus, 1828. 

 Larus islandicus Edmonst. Mem. Wern. Soc iv. 1823, 506 (noc op. cit. p. 185=/,. glauous). 

 Larus minor Bbehm, Vog, Deutsohl. 1831, t:;>'>. 

 Laroidea subleucoplerus Bbehm, t. o. "in. 

 Larus tOlaucus) glaeialis Bkuch. J. f. 0.1853. 101 (nee U looell. I 



Hab. Range about the same as that of L. glaucuB. South in winter to coast of Massa- 

 chusetts ami tip- Greal Lakes. 



Sp. Char. Similar to /.. glaucus, bul much Bmaller, the young darker oolored. 

 in summer: Mantle pale pearl-blue (a Bhade darker than in /.. glaucus); remlges similar, 

 hut slightly paler, passing terminally Into pure white. Seal <>i the plumage Bnow-white, 



• M. Chamberlain, in / '-. ±uk, July 1889, pp. 211-215. 



—29 



