VoI i909" VI ] Fifteenth Supplement to the A. 0. U. Check-List. 295 



first 12 of these eases the names involved are allowed to stand as in 

 the previous editions of the Cheek-List, with the exception of the 

 case of Clwmepclia, which in the present Supplement (below, p. 300) 

 is adopted in place of the untenable name Columbigallina. The 

 last four names are the 'Swainsonian genera,' of late under con- 

 troversy but now accepted in accordance with the law of priority. 



The list of 'deferred cases' is now reduced to 12, 11 of which 

 relate to the status of forms that have been described as species or 

 subspecies, and one is a case of nomenclature. In each of these 

 cases the Committee has been unable to secure material for their 

 proper consideration. 



J. A. Allen, Chairman. 



Charles W. Richmond, Secretary. 



William Brewster. 

 Committee. \ Jonathan Dwight, Jr. 



C. Hart Merriam. 



Robert Ridgway. 

 I Witmer Stone. 



I. ADDITIONS TO THE CHECK-LIST. 



133a. Anas rubripes tristis Brewster. 

 Black Duck. 

 Anas rubripes tristis Brewster, Auk, XXVI, April, 1909, 176. 



197.1. Egretta candidissima brewsteri Thayer & Bangs. 

 Brewster's Snowy Egret. 

 Egretta candidissima brewsteri Thayer & Bangs, Proc. New 

 Engl. Zool. Club, IV, April 29, 1909, 40. 



3016. Lagopus lagopus alexandrae J. Grinnell. 

 Alexander's Ptarmigan. 

 Lagopus alexandrw Grinnell, Univ. Calif. Pub. Zool., V, No. 

 2, Feb. 18, 1909, 204. 



302e. Lagopus rupestris chamberlaini Clark. 

 Adak Ptarmigan. 

 Lagopus rupestris chamberlaini Clark, Proc. U. S. Nat. Mus., 

 XXXII, No. 1539, June 15, 1907, 469. 



