12 



KEY TO THE WATER BIRDS OK FLORIDA. 



Family LARID^E. Gulls and Terns. 

 Subfamily LARIN^. Gulls. 



\ 



Larus argentatus smithsonianus. 



Larus atricilla. 



Lengtli, 21); Win--, iS; Tail, 8; Bill, 2.40. 



Length, 24; Wing, 17.50 Tail, 7.50; Bill, 2.10. 



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 marinus. 

 Great Black-backed Gull. 



See page 59 



Larus argentatus smithsoni= 

 anus. 

 American Herring Gull. 



See page 60 



Larus delawarensis. 

 Ring=billed Gull. See page 60 



Length, 1CJ.50; Wing, 12.50; Tail, 5 ; Bill, about 1.75. 

 Adult — head and throat plumbeous in summer, 

 whitish in winter ; bill reddish. 



Length, 13.50; Wing, 10.40; Tail, 4.15; 15111. 

 1.30. Adult in summer, — bill black; head and 

 neck plumbeous ; feet orange red; in winter, h\\\ 

 black; head and neck white; feet flesh color. 



Larus atricilla. 

 Laughing Gull. 



See page 61 



Larus Philadelphia. 

 Bonaparte's Gull. See page 61 



