I44 KEY TO THE WATER BIRDS OF FLORIDA. 
Famity LARIDZ. GuLus anp TERNS. 
SuspramMIty LARINZE. Gutts. 
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Larus argentatus smithsonianus. Larus atricilla. 
Length, 29; Wing, 18; Tail, 8; Dill, 2.40. Larus marinus. 
Great Black-backed Gull. 
See page 191 
Length, 24; Wing, 17.50 Tail, 7.50; Bill, 2.10. Larus argentatus smithsoni- 
anus. 
American Herring Gull. 
: ? See page 192 
Length, 18.40; Wing, 14; Tail, 6; Bill, about 1.65. 
In summer, bill yellowish banded with black ; 
in winter, tipped with dark brown. Larus delawarensis. 
Ring-billed Gull. See page 192 
Length, 16.50; Wing, 12.50; Tail, 5; Bill, about 1.75. 
Adult — head and throat plumbeous in summer, 
whitish in winter; bill reddish. Larus atricilla. 
Laughing Gull. See page 193 
Length, 13.50; Wing, 10.40; Tail, 4.15; Bill, 
1.30. Adult in summer,— bill black ; head and 
neck plumbeous; feet orange red; in winter, bill 
black; head and neck white; feet flesh color. Larus philadelphia. 
Bonaparte’s Gull. See page 193 
