328 
LARINiE. LARUS. 
Adult, 26, 50. 
During winter from New York to Nova Scotia. Not rare. Breeds 
on the islands and peninsulas of the Arctic Seas. 
Larus leucopterus, Bonap. Syii. p. 361. 
Larus leucopterus, Wliite-winged Silvery Gull, Swains. & Rich. F. Bor. Amer. 
V. ii. p. 418. 
White-winged Silvery Gull, Nutt. Man. v. ii. p. 305. 
White-winged Silvery Gull, Larus leucopterus, Aun. Orn. Biog. v. iii. p. 553. 
450. 10. Larus occidentalis, Aud. Western Gull. 
Not figured 4 
Bill robust, compressed, yellow, with an orange-red patch toward 
the end of the lower mandible ; iris light hazel ; feet flesh-coloured ; 
head, neck, lower parts, rump, and tail pure white ; back and wings 
light greyish-blue, of a deeper tint than in L. argentatus ; edges of the 
wdngs and extremities of the quills white ; first seven quills greyish- 
black toward the end, that colour including the outer webs and the 
greater part of the inner of the two first, and on the rest gradually di- 
minishing, so as on the seventh merely to form a subterminal bar ; the 
first quill with a patch of white on both webs near the end ; the tips 
of all white. Young male in winter with the bill black, feet flesh- 
coloured; upper part and sides of the head, hind part and sides of 
the neck, light brownish-grey, faintly mottled and streaked with 
white ; upper parts in general greyish-brown, confusedly mottled with 
whitish ; rump white barred with brown ; primary quills greyish - 
black, without white at the end ; secondary quills similar, more grey 
toward the base, margined and tipped with white, undulated with 
brown ; tail greyish-black, tipped with whitish ; lower parts greyish- 
white, mottled with greyish-brown. This species, which is very inti- 
mately allied to Larus argentatus, is remarkable for the great depth 
and comparative shortness of its bill. 
Male, 2*7, wing 17?, but the feathers not complete. 
Western Gull, Larus occidentalis, Aud. Orn. Biog. v. v. p. 320. 
% 
451. 11. Larus argentatus, Brunnich. Herring or Sil- 
very Gull. 
Plate CCXCl. Adult and Young. 
Bill robust, compressed, gamboge-yellow^ with an orange-red patch 
toward the end of the lower mandible ; iris silvery-white ; feet flesh- 
coloured ; head, neck, lower parts, rumjp, and tail pure white ; back 
and wings light greyish-blue ; edges of wing and extremities of quills 
white ; the first six quills brownish-black towards the end, that co- 
lour including the outer webs and the greater part of the inner of the 
first two, and on the rest gradually diminishing, so as on the sixth 
