LARINA. LARUS. 
327 
Ivory Gull, Nutt. Man. v. ii. p. 301. 
Ivory Gull, Larus ebumeus, Aud. Om. Biog. v. iii. p. 571. 
448. 8. Larus zonorhynchus, Richardson. Ring-billed 
Gull. — Common American Gull. 
Plate CCXII. Adult and Young. 
Bill stout, compressed, greenish-yellow, with a broad band of black 
opposite the prominence ; wings two inches and a half longer than the 
tail ; feet greenish-yellow ; general colour of the plumage pure white, 
excepting the back and upper surface of the wings, which are light 
greyish-blue ; the first six quills black towards their extremities, the 
first and second being almost entirely so, the sixth with only a small 
spot ; the tips of these feathers white, the first moreover with a long 
patch of white, over its whole breadth, the second with a smaller patch, 
not occupying the entire breadth, sometimes confined to^ the inner 
web, the other quills white at the end. Young after second moult 
with the bill black, the feet purplish-grey ; general colour of plumage 
dull white, mottled with greyish-brown beneath, on the back with 
large brownish-black spots, the dark markings being central ; anterior 
to the eye a crescent of greyish-black ; outer primary quills black, 
terminally edged with white. 
Adult, 20, 48. 
Common during winter from Texas, along the coast, to Maine. Up 
the Mississippi to Natchez. Breeds from Maine to Labrador, Hudson’s 
Bay, and Arctic shores. Columbia River. Migratory. 
Larus canus. Mew or Common Gull, Rich. & Swains. F. Bor. Amer. v. ii. p. 420. 
Larus zonorhynchus. Ring-billed Mew-Gull, Ibid. p. 421. 
Larus brachyrhyncbus. Short-billed Mew-Gull, Ibid. p. 422. 
Ring-billed Mew-Gull, Nutt. Man. v. ii. p. 300. 
Common American Gull, Larus zonorhynchus, Aun. Orn. Biog. v. iii. p. 98 ; v. v. 
p. 638. 
449. 9. Larus leucopterus, Fabr. White-winged Silvery 
Gull. 
Plate CCLXXXIT. Adult and Young. 
Bill stout, gamboge-yellow, with a spot of orange-red near the end 
of the lower mandible ; angle of the mouth and edges of eyelids orange- 
red ; feet pale flesh-colour ; wings more than two inches longer than 
the tail ; plumage pure white, excepting the back and upper surface 
of the wings, which are light greyish-blue ; the tips of the secondaries, 
the terminal third of the primaries, and the upper tail-coverts, also 
white. Young in second plumage with the bill yellow, tipped with 
black, the feet yellowish flesh-colour ; plumage yellowish-grey, marked 
on the head and neck with longitudinal streaks of pale brown, on the 
back and wings with tranverse undulations, those on the tail much 
fainter ; the first six quills destitute of markings. 
