1 6 CHECK-LIST OF NORTH AMERICAN BIRDS. 



[B 672, C 552, R 658, C 782.J 



Geog. Dist. — Arctic regions, south in eastern North America 

 in winter to the Great Lakes and the Middle States. 



40 a. Rissa tridactyla pollicaris Ridgw. 

 Pacific Kittiwake. 



Rissa tridactyla pollicaris " Stejn. MS." Ridgw. Water B. N. 

 Am. II. 1884, 202. 



[B — , C ss2a, R 658^, C 783-J 



Geog. Dist. — Coasts of North Pacific and Bering Sea, south in 

 winter casually to southern California. 



41. Rissa brevirostris (Bruch). 



Ked-Iegged Kittlwake. 



Larus brevirostris Bruch, J. f. O. 1853, 103. 



Rissa brevirostris Lawr. in Baird's B. N. Am. 1858, 855. 



[B 674, 67s, C SS3, R 659, C 784.] 



Geog. Dist. — Coasts and islands of Bering Sea. 



Genus LARUS Linn^us. 



Larus Linn. S. N. ed. 10, I. 1758, 136. Type, by elimination, 

 L. canus Linn. 



42. Larus glaucus Brunn. 



Glaucous GuU. 



Larus glaucus Brunn. Orn. Bor. 1764, 44. 



[B 656, C 543, R 660, C 768.] 



Geog. Dist. — Arctic regions, south in winter in North America to 

 the Great Lakes and Long Island. 



42.1. Larus barrovianus Ridgw. 

 Point Barrow Gull. 



Larus barrovianus Ridgw. Auk, III. July, 1886, 330. 



