PREFACE TO THE SECOND EDITION. 



AT 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 Com- 



' 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. i8go, pp. 60-66. Also separate. 



Third Supplement to the American Ornithologists' Union Check-List of North 

 American 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 

 American 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 Nomen- 

 clature I of the I American Ornithologists' Union | — | Abridged Edition ( Re- 

 vised I — I Published by the American Ornithologists' Union | 1889. — 8vo, pp. 71. 

 Includes the additions to the original Check-List made in the first Supplement. 



* Republished separately in 1892 as a pamphlet of 72 pages with the following 

 title : The | Code of Nomenclature | adopted by the | American Ornithologists' 

 Union | — | Zoological Nomenclature is a means, not an end, of Zoological 

 Science | — | New York | American Ornithologists' Union | 1892. 



