VOl i's^ VI ] Ninth Supplement to the A. O. U. Check-List. 97 



NINTH SUPPLEMENT TO THE AMERICAN ORNI- 

 THOLOGISTS' UNION CHECK-LIST OF NORTH 

 AMERICAN BIRDS. 



The Eighth Supplement to the A. O. U. Check-List of North 

 American Birds — the first since the appearance of the " second 

 and revised " edition of the Check-List — was published in Janu- 

 ary, 1897 (Auk, XIV, pp. 1 17-135). The present (Ninth) 

 Supplement gives a report of the action of the Committee on 

 Classification and Nomenclature of North American Birds on 

 all questions affecting the Check-List that have come before it 

 for consideration since that date, covering the two years between 

 January, 1897, and January, 1899. While a satisfactory decision 

 was practicable in most cases, in quite a number of instances 

 either the material available for examination was insufficient, or 

 the questions were too complicated for the Committee to decide 

 in the limited time available for concerted work. These have 

 been referred to subcommittees for investigation, and will come 

 up for final action at a future meeting of the Committee. 



As in the previous Supplements, the numbers at the left of the 

 scientific names furnish the means of easy collation of the Sup- 

 plement with the Check-List. The interpolated species and 

 subspecies are numbered in accordance with the provision made 

 therefor in the Code of Nomenclature (p. 14, last paragraph). 



( Robert Ridgway, Chairman. 

 J J. A. Allen. 

 Committee -\ William Brewster. 

 I Elliott Coues. 

 \Q.. Hart Merriam. 



I. ADDITIONS TO THE CHECK-LIST, AND AC- 

 CEPTED CHANGES IN NOMENCLATURE. 



Family URINATORID^I (Check-List, 2d ed., p. 3). (Cf. 

 Allen, Auk. XIV, July, 1898, 312.) 

 This becomes 



Family GAVIID-ffi. 



