QO CHECK-LIST OF NORTH AMERICAN BIRDS. 



54. Larus delawarensis ORD. 



Ring-billed Gull. 



Larus delawarensis ORD, GUTHRIE'S Geog. 2cl Am. ed. 1815, 319. 

 [B 664, C 548, R 669, C 778.] 



HAB. North America at large; south in winter to Cuba and 

 Mexico. 



55. Larus brachyrhynchus RICH. 



Short-billed Gull. 



Larns brachyrhynchus RICH. F. B. A. II. 1831, 421. 

 [B 665, 673, C 549, R 670, C 780.] 



HAB. Arctic America and Pacific coast, south in winter to Southern 

 California. 



[56.] Larus canus LINN. 



Mew Gull. 



Larus canus LINN. S. N. ed. 10, I. 1758, 136. 

 [B C R6 7 T, C 779 .] 

 HAB. Europe and Asia ; accidental in Labrador. 



57. Larus heermanni CASS. 



Heermann's Gull. 



Larus heermanni CASS. Pr. Ac. Nat. Sci. Phila. VI. 1852, 187. 

 [B666, C 551, R672, C 781.] 



HAB. Pacific coast of North America, from British Columbia to 

 Panama. 



58. Larus atricilla LINN. 



Laughing Gull. 



Larus atricilla LINN. S. N. ed. 10, I. 1758, 136. 

 [B 667, C 554, R 673, C 786.] 



HAB. Eastern tropical and warm temperate America, chiefly along 

 the sea-coast, from Maine to Brazil ; Pacific coast of Middle America. 



