^^903^] T-Melfth Supplement to the A. O. U. Check-List. 33 I 



TWELFTH SUPPLEMENT TO THE AMERICAN 



ORNITHOLOGISTS' UNION CHECK-LIST OF 



NORTH AMERICAN BIRDS. ^ 



Two sessions of the Committee have been held in Washington 

 since the appearance of the last Supplement. At the first meet- 

 ing (November 21, 1902) questions of generic and subgeneric 

 rank only were considered, and much progress was made tow-ard 

 eliminating these from the category of deferred cases. In April 

 (16 to 18) of the present year a longer meeting was held, at which 

 many additional cases were discussed, but action on certain gen- 

 eric names {e. g., Horizopiis) was again postponed, owing to lack 

 -of time for their proper consideration. 



The list of deferred cases is still formidable, but it is hoped that 

 at the next meeting of the Committee the number of such cases will 

 be very materially reduced. 



fC. Hart Merriam, Chairman. 

 \ J. A. Allen. 

 William Brewster. 

 Committee. ■{ Jonathan Dwight, Jr. 

 I Charles W. Richmond. 

 I Robert RidCxWay. 

 LWitmer Stone. 



I. ADDITIONS TO THE CHECK-LIST AND ACCEPTED 

 CHANGES IN NOMENCLATURE. 



-86rt. Fulmarus glacialis minor (Kjaerbcelling). This is 

 eliminated from the Check-List as indistinguishable from F. 

 g/acia/is. the alleged characters being the result of sexual or 



1 Four Supplements have been issued since the publication of the Second 

 Edition of the Check-List in 1895 : 



Eighth Supplement, Auk, XIV, 1S97, pp. 1 17-135. 

 Ninth Supplement, Auk, XVI, 1899, pp. 97-133. 

 Tenth Supplement, Auk, XVIII, 1901, pp. 295-320. 

 Eleventh Supplement, Auk, XIX, 1902, pp. 315-342. 



