110 Birds of Canada. 
is blackish-gray ; lower part of neck and entire 
under plumage, pure white; back and wings, 
srayish-lead color. Breeds in Canada. Nests, 
in marshes ; eggs, three, of an olive-drab color. 
C. philadelphia.—Bonaparte's Gull. 
This well known gull is a summer resident of 
Canada. Back and wings, clear bluish-gray ; 
under plumage, rump, and tail, white; length, 
fourteen inches. 
Rissa tridactylaThe Kittiwake Gull. 
The Kittiwake Gull occasionally visits Lake 
Ontario during the fall. The head, neck, and 
under plumage is pure white; back and wings, 
light bluish-gray ; bill, greenish-yellow ; legs, 
brownish-black. 
Sub-Family STERINZ.—The Terns. 
Sterna aranea.—VThe Marsh Tern. 
This pretty tern is a regular visitor. Head, 
black ; back and wings, light bluish-gray; under 
plumage, pure white ; bill, legs, and feet, black. 
S. caspia-——The Caspian Tern. 
The Caspian Tern is a fall and winter visitor. 
Head, black, glossed with green; back and 
