Birds of Canada. 107 
FAMILY LARID#.—_THE GULLS. 
Sub-Family LESTRIDINE.— The Skua Gulls. 
Stercorarius parasiticus —The Arctic Skua. 
The Arctic Skua breeds in the northern part 
of this continent. During the winter it frequents 
the sea coast of Canada. Length, twenty-two 
inches; color, above, brownish-black ; beneath, 
white. 
S. pomarinus—The Pomarine Skua. 
This species breeds in the far north. It is 
much more common than the preceding. Color, 
dark brown, tinged with black, above ; beneath, 
white. Length, twenty inches. A regular visitor 
to the sea coast of Nova Scotia and Newfound- 
land. 
Sub-Family LARINE.—The Gulls. 
Larus marinus—The Great Black-backed Gull. 
This fine bird is twenty-six inches in length; 
the bill is pale yellow, thick and strong ; upper 
parts of the back and wing, black ; all the other 
parts of its plumage, white ; legs, pale flesh color. 
Breeds in Labrador. Isa fall, and, sometimes, 
winter visitor in Canada. 
Larus Sabini—The Fork-tailed Gull. 
This gull frequents the coast of New Bruns- 
wick and Nova Scotia. Head and upper part of 
