Vol 'i£^ XV ] Oberholser, Subspecies of Larus hyperboreus. 473 



by its decidedly darker mantle. Although it really is but sub- 

 specifically different from Larus hyperboreus, the restoration of 

 this form of Mr. Ridgway's to standing among North American 

 gulls is a pleasurable privilege. 



This race appears to be confined in the breeding season to Alaska 

 and the territories of Yukon and western Mackenzie. No Japanese 

 specimens have been detected among those examined, but it is not 

 at all unlikely that Larus hyperboreus barrovianus does occasionally 

 migrate to Japan. The specimen of Glaucous Gull already re- 

 corded from the Red River in Clay County, Texas, proves to 

 belong to the present race. The type of Larus hyperboreus barro- 

 vianus is No. 88913 of the United States National Museum register, 

 and is still in the collection. It was taken on August 4, 1882, by 

 Middleton Smith, at Point Barrow, Alaska. It agrees with other 

 specimens of this subspecies in size, but is somewhat paler, on the 

 mantle than usual individuals, and is possibly not quite adult. 



We have examined 111 specimens of the present race, from the 

 following localities: 



Alaska — St. Michael (June 15, 1880; June, 1866; Sept. 21, 

 1877; Sept. 18, 1875; Sept. 1, 1876; July 15, 1866; July 15, 1915 

 Sept. 3, 8, and 13, 1899; June 28, 1915; Aug. 8 and 14, 1915) 

 Point Barrow (Aug. 5 and 18, 1882; July 26, 1883; May 21, 1881 

 Sept. 9 and 15, 18S2; June 1, 1882; Sept. 5, 17, 23, and 28, 1897 

 Aug. 11, 20, 24, 26, and 27, 1897; June 1, 2, 8, and 17, 1898; Oct. 

 5, 1897); Kowak River; St. Paul Island, Pribilof Islands (June 

 21, 1890); Bethel (July 14, 1914; Aug. 18, 1914; July 24, 1915); 

 Unalaska, Unalaska I. (June 9, 1911; Nov. 1, 1903; Nov. 12, 1904); 

 Beaver Inlet, Unalaska Island (July 4, 1901 [nestling]); near 

 Bering Strait; Nome (Sept. 19 and 21, 1913; Sept. 2 and 11, 1910; 

 July 28, 1902; Aug. 20, 1903; Aug. 10, 1902; Sept. 14, 1900; 

 summer, 1901); Pikmiktalik River (July 1-15, 1877); Amak 

 Island (July 18, 1911 [nestling]; Camden Bay (Aug. 4, 1913); 

 Port Clarence (July 27, 1895; July 24, 1897); Yukon Delta (June 

 29, 1914); Wainwright Inlet (Aug. 17, 1914); Gwydyr Bay (July 

 16, 1910); Barter Island (Sept. 4, 1908); Kulugrua River (July 

 13, 1898 [nestling]) ; Demarcation Point (June 10, 1914) ; Griffin 

 Point (July 12, 1914) ; Nelson Island (July 24, 1911) ; near Flaxman 

 Islands, Arctic Ocean (July 31, 1913); Chamisso I. (Aug. 1, 1914). 



