of the United States. 359 



294. Larus atricilla, L. Mantle dark bluish-ash ; quills 

 entirely black ; bill robust, and with the feet dark red ; tarsus 

 nearly two inches. 



Summer plumage, a dark plumbeous hood on the head and 

 neck, descending- lower before : winter, no hood. 



Young brownish skirted with whitish and rusty ; tail with 

 a black subterminal band. 



Black-headed Gull, Larus ridibundus, Wils. Am. Orn. ix. 

 p. 89. pi. 74. Jig. 4. 



Inhabits both continents, found throughout North America, 

 very common during summer and autumn on the coasts of 

 New- Jersey, where it breeds : found also on the south-wes- 

 tern coasts of Europe. 



295. Larus tridactylus, L. Mantle blue-gray ; quills black 

 at the point ; hind toe obsolete, destitute of nail. 



Summer plumage, head and neck pure white : winter, 

 head and neck bluish-gray ; fine black lines before the eye. 

 Young dingy, spotted ; tail with a black subterminal band. 

 Kittiwnke Gull, Latham. Wilson's list. Buff. pi. enl. 387. 

 Inhabits the north of both continents. 



296. Larus canus, L- Mantle bluish-gray; quills black at 

 the point, reaching much beyond the tail ; shafts black ; 

 bill small ; feet bluish ; tarsus little more than two inches. 



Summer plumage, head and neck pure white : winter, head 

 and neck with blackish spots. 



Young brownish-cinereous, varied with rusty. 



Common Gull, Lath. Wilson's list. Buff. pi. enl. 977. 



Inhabits both continents : common : numerous during 

 winter in the middle states. 



Buff. pi. enl. 970. summer dress, 969 winter dress. 



Inhabits throughout Europe and northern Africa : very common at 

 Rome. Said to be found also in North America, by respectable authorities; 

 aerer ascertained by us. 



