PREFACE TO THE SECOND EDITION. 
T the Eleventh Congress of the American Ornithologists’ Union, 
held in Cambridge, Mass., November 20-23, 1894, it was voted 
to publish, as early as practicable, a new edition of the Union’s Check- 
List of North American Birds, to include the numerous additions and 
nomenclatural changes made in the several Supplements’ to the 
Check-List since the publication of the original edition, together with 
a revision of the ‘habitats’ of the species and subspecies, but omitting 
the Code of Nomenclature.? The original Committee on Classifica- 
tion and Nomenclature of North American Birds was reappointed? 
to take charge of the work. The Committee held sessions in Washing- 
ton, D. C., January 15-19, 1894, and February 12, 13, 1895, to outline 
the work and to rule on the questions involved in the publication of 
the revised List. The revision of the matter relating to the geographic 
1 Supplement | to the | Code of Nomenclature and Check-List | of | North American 
Birds | adopted by the American Ornithologists’ Union | Prepared by | a Committee of 
the Union | — | New York | American Ornithologists’ Union | 1889.— 8vo, pp. 23. 
Second Supplement to the American Ornithologists’ Union Check-List of North 
American Birds. The Auk, VII, Jan. 1890, pp. 60-66. Also separate. 
Third Supplement to the American Ornithologists’ Union Check-List of North Ameri- 
can Birds. The Auk, VIII, Jan. 1891, pp. 83-90. Also separate. 
Fourth Supplement to the American Ornithologists’ Union Check-List of North 
American Birds. The Auk, IX, Jan. 1892, pp. 105-108. Also separate. 
Fifth Supplement to the American Ornithologists’ Union Check-List of North American 
Birds. The Auk, X, Jan. 1893, pp. 59-63. Also separate. 
Sixth Supplement to the American Ornithologists’ Union Check-List of North Ameri- 
can Birds. The Auk, XI, Jan. 1894, pp. 46-51. Also separate. 
Seventh Supplement to the American Ornithologists’ Union Check-List of North 
American Birds. The Auk, XII, April, 1894, pp. 163-169. Also separate. 
Check-List | of | North American Birds | according to the Canons of Nomenclature | of 
the | American Ornithologists’ Union | — | Abridged Edition | Revised | — | Published 
by the American Ornithologists’ Union | 1889.— 8vo, pp. 71. Includes the additions 
to the original Check-List made in the first Supplement. 
2 Republished separately in 1892 as a pamphlet of 72 pages with the following title: 
The | Code of Nomenclature | adopted by the | American Ornithologists’ Union | — | 
Zodlogical Nomenclature is a means, not an end, of Zodlogical Science | — | New York | 
American Ornithologists’ Union | 1892. [S8vo, pp. i-v + 1-72. Same as the original, 
with a prefatory ‘ Note’ and Index.] 
3 With the exception of Mr. H. W. Henshaw, who was unable to serve, and Dr. C. Hart 
Merriam was appointed in his stead, 
15 
