BKEWSTER : BIRDS OF THE CAPE REGION, LOWER CALIFORNIA. 21 



bird on the coast of California, but it breeds exclusively in the interior. Mr. 

 S. W. Denton tells me that in 1880 he found a large colony nesting on a vol- 

 canic island in Mono Lake (eastern California), which is perhaps the most 

 southern locality where the eggs have been taken. 



Larus delawarensis Ord. 



Ring-billed Gull. 



Larus delawarensis Belding, Proc. U. S. Nat. Mus., V. 1883, 545 (Cape Region). 

 Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 251 (Cape Region). 



Mr. Belding includes the Ring-billed Gull in a list of birds found in the Cape 

 Region 1 between December 15, 1881, and May 17, 1882, but he says nothing 

 whatever about its comparative scarcity or abundance. Mr. Frazar did not 

 meet with, or at least certainly identify, the species, nor is it mentioned by 

 Xantus, Streets, or Townsend. According to Mr. Bryant it has been seen in 

 winter at San Quentin Bay by Mr. Anthony. On the western coast of Mexico, 

 nearly opposite Cape St. Lucas, Colonel Grayson found it " common during 

 the winter months in the neighborhood of Mazatlan." ^ 



Mr. H. W. Henshaw writes me that he has seen a few immature birds off 

 San Buenaventura, California, during the month of November, and Mr. Grinnell 

 characterizes the species as tolerably common along the coast of Los Angeles 

 county in mid-winter, while at the latter season it has been found in small 

 numbers at Monterey by Mr. Loomis. 



The Ring-billed Gull breeds as far southward as southeastern Oregon, accord- 

 ing to Captain Bendire.' 



Larus heermanni Cass. 



Heeumann's Gull. 



Blasipiis heermanni Baird, Proc. Acad. Nat. Sci. Phila., 1859, 301, 306 (Cape St. 



Lucas). 

 Larus heermanni Belding, Proc. U. S. Nat. Mus., V. 1883, 545 (Cape Region). 



Young specimens of this Gull were collected at Cape St. Lucas by Mr. 

 Xantus in 1859, and Mr. Belding gives the species without comment in his 

 list of birds observed at La Paz in the winter of 1881-82. Mr. Frazar's collec- 

 tion contains three skins obtained on March 13, near Carmen Island. His 

 notes include only one reference to the bird, a mere incidental mention of a 

 specimen which he saw at San Josd del Cabo on September 6. 



1 Mr. Ridgway tells me tliat there is a specimen ( 9 adult, No. 86,392) in the 

 National Museum which was taken by Mr. Belding at La Paz, on February 15, 

 1882. 



2 Baird, Brewer, and Ridgway, Water Birds N. A men, IL 1884, 246. 

 8 Proc. Bost. Soc. Nat. Hist., XIX. 1877, 148. 



