FAMILY LARIDiE. GULLS AND TERNS. 



35 



FAMILY LARID^. 



GULLS AND TERNS. 

 SUB^^AMILY LARIN^. GULLS. 



Tail, isiali.v neaki.v st^uAKE. 



GROrr 1. Wing, 9.30 to 11 inches long. See page 36. 

 Grout 2. Wing, 11 to 13 inches long. See page 36. 

 Group 3. Wing, 13 to 15 inches long. See page 38. 

 Group 4. Wing, 1.5 to 17 inches long. See page 38. 



Section 1. Length, over 21; bill, over 2; underparts, white. See page 38. 



Section 2. Length, over 21 ; bill, over 2 ; underparts, not white. See page 39. 



Section 3. Length, over 21 ; bill, under 2; underparts, white. See page 39. 



Section 4. Length, over 21; bill, under 2; underparts, not wliite. See page 40. 



Section 5. Length, under 21. See page 40. 

 Group 5. Wing, over 17 inches long. See page 40. 



SUBFAMILY STERNIN^E. TERNS. 



Tail, usually fohked. 



,,^-'— 



Group .5. 

 Group 6. 

 Group 7. 



GiiOUi* 1. Wing, .5.50 to 7. .50 inches long. See page 41. 



Group 2. Wing, 7. .50 to 8. .50 Inches long. See page 4L 



Group 3. Wing, 8. .50 to 9.50 inches long. See page 41. 



Group 4. Wing, 9.50 to 11 inches long. See page 41. 



Wing, 11 to 13 inches long. See page 43. ^ 



Wing, 13 to 17 inches long. See page 43. * 

 Wing, over 17 inches long. See page 43, 



