359 
of the United States . 
294. Larus atricilla, L. Mantle dark bluish-ash j 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. 
Blade-headed Gull , Larus ridibundus , Wils . Am. Om . icc. 
JJ. 89. pi. 74. fig. 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. 
Kittiivake 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; 
Rever ascertained by us. 
