of the United States. 301 



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 j* 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, Lath,. Wilson's list. Bvff. pi. enl. 25S. 

 Larus argenteus, Macgillivray ; (who, however, evidently con- 

 siders this and the preceding but one species.) Larus ar- 

 gentatus, and Larus argenteus, Brehtn, {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, Temrn. Larus argentatus, Capt. Sabine. 

 Larus arcticus, Macgillivray. 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 states. 



302. Larus glaucus, Brunn. Mantle bluish-gray j 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. 



