V ° L 1920 XVH ] Proposed Changes in the A.O.U. Check-List. 275 



elsewhere, used without sufficient explanation or not known to 

 be based on original research, of changes or additions queried or 

 but tentatively made, or of the elimination of subspecies by authors 

 who, on general principles, recognize no subspecies. 



This list is intended to include everything pertinent up to 

 December 31, 1919, and nothing after that date has been taken. 

 In view of the volume and widely scattered character of current 

 ornithological literature, it is not at all unlikely that some names 

 or changes have been overlooked, and the writer would be very 

 thankful for reference to any omissions, in order that such may 

 be duly given a place in next year's list. 



ADDITIONS AND CHANGES IN NAMES. 1 



Gavia viridigularis Dwight becomes Gavia arctica viridigularis 



Dwight, because only a subspecies of Gavia arctica. (Cf. Bent, The 

 Auk, XXXVI, No. 2, April, 1919, pp. 238-242.) 

 Alcella Stone. Raised to generic rank. (Cf. Ridgway, Bull. U. S. 

 Nat. Mus., No. 50, VIII, June 26, 1919, pp. 705, 770.) Contains 

 one species now in the genus Aethia: 

 Alcella pygmaea (Gmelin). 

 Ciceronia Reichenbach. Raised to generic rank. (Cf. Ridgway, Bull. 

 U. S. Nat. Mus., No. 50, VIII, June 26, 1919, pp. 705, 767.) Con- 

 tains one species now in the genus Aethia: 

 Ciceronia pusilla (Pallas). 

 Endomychura Oberholser. Raised to generic rank. (Cf. Ridgway, 

 Bull. U. S. Nat. Mus., No. 50, VIII, June 26, 1919, pp. 704, 751.) 

 Contains two species now in the genus Brachyramphus: 

 Endomychura hypoleuca (Xantus). 

 Endomychura craveri (Salvadori). 

 fCepphus motzfeldi (Benicken). Uria motzfeldi Benicken, Isis, August, 

 1824, col. 889 (Greenland). Revived as a species. (Cf. Ridgway, 

 Bull. U. S. Nat. Mus., No. 50, VIII, June 26, 1919, p. 742.) 

 fUria ringvia Briinnich, Ornith. Bor., 1764, p. 28 (Iceland). Revived 

 as a species. (Cf. Ridgway, Bull. U. S. Nat. Mus., No. 50, VIII, 

 June 26, 1919, p. 719.) 

 Pagophila eburnea (Phipps) becomes again Pagophila alba (Gun- 

 nerus) (Larus albus Gunnerus, in Leem's Beskr. Finm. Lapp., 1767, 

 p. 285), since the latter proves to be identifiable. (Cf. Ridgway, 



i Additions to the A. O. U. Check-List, the Sixteenth Supplement, and the 

 First, Second, Third, and Fourth Annual Lists are marked with a dagger (t). 

 Generic (and subgeneric) names so indicated have not hitherto stood in the lists 

 in either generic or subgeneric sense. 



