THE BLACK-HEADED GULL. 



735 



white extreme tips and broad penultimate black-brown band, 

 narrower on outer feathers and usually restricted to inner web or 



Two outer primaries of juveniles of— 1. The Common Gnll (Larus c. canus). 2. The Mediter- 

 ranean Black-headed Gull (L. melanocephalus). 3, The Black-headed Gull (L. r. ridibundus). 

 4. Bonaparte's Gull (L. Philadelphia). 



to a spot or even absent on outermost feathers ; primaries : 2nd 

 (outer) black outer web, tip, inner edge of inner web and usually 



