BIRDS OF THE CAMBRIDGE REGION. 93 



mile or more below, that it was always accompanied by a number of Herring 

 Gulls and occasionally by a few Black-backed Gulls, that she had repeated oppor- 

 tunities for comparing it with these species, and that on several occasions it was 

 very near her, sometimes on wing, sometimes standing on a cake of ice. It 

 seemed to be of about the size of a large Herring Gull, and its entire plumage, 

 including that of the wings, was pure white. The legs and feet were light- 

 colored, as was the bill except for a dark space at the tip. In short her descrip- 

 tion leaves no doubt in my mind that the bird was a Glaucous Gull in the 

 immature or ' liutcliinsii ' plumage. 



On November 29, 1899, 1 found a Glaucous Gull in Fresh Pond. Like the 

 bird seen at VVatertown by Miss Stockwell it was in the ' liutcliinsii ' plumage, 

 i. e., wholly white, without trace of blue in the mantle or of mottling anywhere. 

 Its bill, which was flesh-colored with a dark band near the tip, appeared some- 

 what larger than the bills of the numerous Herring Gulls by which it was 

 closely surrounded. I could see all this distinctly with a strong glass, for the 

 bird was in a good light and at no great distance. During most of the time 

 that I spent watching it, it remained apparently asleep with its head buried 

 among the scapular feathers, slowly revolving as it drifted before a light wind. 

 Every now and then, however, it would rouse itself and preen its plumage for a 

 few minutes before lapsing into unconsciousness again. 



9. Larus leucopterus Faber. 

 Iceland Gull. White-winged Gull. 



Winter visitor of infrequent if not rare occurrence. 



Messrs. E. A. and O. Bangs have an immature Iceland Gull which they 

 took on January 31, 1880, in the Back Bay Basin where it was flying about, 

 near the Milldam, "in company with another of the same species."' A third 

 bird of similar size and appearance was seen here by Mr. Outram Bangs on 

 January 15, 1894, and a fourth by Mr. W. A. Jeffries on February 11 of the 

 same winter. A fifth, shot by a boy on November 4, 1897, was flying over the 

 Glacialis, into which it fell, remaining in the water until two days later when Mr. 

 O. A. Lothrop found it floating within reach of shore. It is one of a number of 

 exceptionally rare or interesting specimens which the gentleman last named has 

 been kind and generous enough to contribute to my collection. 



1 E. A. and O. Bangs, Bulletin of the Nuttall Ornithological Club, VI, i88i, 124. 



