24 NESTS AND EGGS OF 



Its general habits, nesting, eggs, etc., are doubtless similar to 

 those of other Gulls. Prof. Ridgway gives the average measurement 

 of its eggs as 3.05 x 2.03. 



43. Larus leucopterus Faber. [661.] 



Iceland Onll. 



Hab. Arctic Regions, south in winter in North America to Massachusetts, and further. 



This Gull is precisely like the last, but smaller, and it is difficult 

 to distinguish the two at a distance. Another common name for it is 

 White-winged Gull. It is an Arctic species, and its distribution dur- 

 ing the breeding season is nearly identical with that of the Burgo- 

 master, being found in the northern parts of Europe, Asia and North 

 America. The two species are often found nesting in the same places, 

 and the nests are of the same construction. The eggs, however, are 

 smaller, measuring 2.79x1.85. 



44. Larus glaucescens Naum. [662.] 



Glaucons-iviiiged Gull. 



Hab. Pacific coast of North America, from Alaska south to California; on the Asiatic side south to 

 Japan. 



Almost as large a species as the Glaucous Gull or Burgomaster. 

 It breeds on the islands of the Pacific coast from Washington Terri- 

 tory northward. The nests are not always built on the shelving rocks 

 of high cliffs. On the Aleutian Islands they are found among the tall 

 grass on the highest parts of the islands, while others are built on pro- 

 jections of rocks. Sometimes there is little or no attempt at nest- 

 making, the eggs being laid in a slight depression of the ground. 



On Bering Sea and Copper Islands, on the Kamtschatkan coast, 

 this species breeds all around the shores. Eggs have been found as 

 early as the middle of May. These are said to be of a more greenish 

 tinge and the spots more numerous and better defined than in those 

 of the glaiiciis. Size 2.88 x 2.03. 



45. Larus kumlieni Brewst. 



Kumlien's Gull. 



Hab. North Atlantic coast of North America; south in winter to the coast of the Middle States. 



This new species of Gull, first described by Mr. William Brew- 

 ster,* is like glmtcescefts^ but somewhat smaller. It is recorded as 

 being quite common in the upper Cumberland water, where it breeds, 

 placing the nests on shelving rocks of high cliffs. The eggs are said 

 to be the same as those of glaucescens. 



* Bull. Nutt. Club., Vol. VIIL, p. 216. 



