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 Com- 
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 Omithologists’ Union | 
1889. — 8vo, pp. 23. 
Second Supplement to the American Ornithologists’ Union Check-List of 
North American Birds. Zhe Auk, VII, Jan. 1890, pp. 60-66. Also separate. 
Third Supplement to the American Ornithologists’ Union Check-List of North 
American Birds. Zhe 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. Zhe Auk, X, Jan. 1893, pp. 59-63. Also separate. 
Sixth Supplement to the American Ornithologists’ Union Check-List of North 
American Birds. Zhe Auk, XI, Jan. 1894, pp. 46-51. Also separate. 
Seventh Supplement to the American Ornithologists’ Union Check-List of 
North American Birds. Zhe Auk, XII, April, 1894, pp. 163-169. Also separate. 
Check-List | of | North American Birds | according to the Canons of Nomen- 
clature | of the | American Ornithologists’ Union | — | Abridged Edition | Re- 
vised | — | 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 asa 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 Zodlogical 
Science | — | New York | American Ornithologists’ Union | 1892. 
