301 
of the United States. 
black at the point, tipped with white, reaching much beyond 
the tail ; shafts black ; first primary only, with a white spot 
besides the narrow tip;* tarsus nearly three inches; nostrils 
linear. Length two feet. 
Summer plumage, head and neck pure white: winter, head 
and neck with brown lines. 
Young blackish cinereous, mottled with yellowish-rusty. 
Herring Gull , Lalh. Wilson's list. Buff. pi. enl. 25S* 
Larus argenteus . Maegillivray ; (who, however , evidently con- 
siders this and the preceding but one species.) Larus ar- 
gentatus, and Larus argenteus , Brehm, (which I do not think 
distinct.) 
Inhabits both continents : not uncommon near New- York 
and Philadelphia, as well as in Italy. 
301. Larus leucopterus, Faber. Mantle pale bluish-ash $ 
quills grayish-white, white at the point, reaching to the 
tip of the tail ; shafts pure white ; tarsus two inches. 
Summer plumage, head and neck pure white : winter, head 
and neck streaked with brown. 
Young dingy, mottled. 
Larus glaucoides, Temm. Larus argentatus , Capt . Sabine. 
Larus arcticus, Maegillivray. Omitted in my catalogue. 
Never figured. 
Inhabits the Arctic circle, whence it migrates in winter to 
the boreal regions of both continents, advancing farther south 
in America : not rare in the northern and middle stales. 
302. Larus glaucus, Brunn. Mantle bluish-gray ; quills 
grayish-white, white at the point ; shafts white, tinged with 
* Though I have found them constant in all the Italian, English, and 
North American specimens of both species that I have examined, I cannot 
give these markings as sure tests of the two species, which, however, 
are certainly distinct, and though closely allied, may at once be distin- 
guished by the size. 
