APPENDIX I
ADDITIONS, SUBTRACTIONS, AND EMENDATIONS.
Since the publication of the first edition of the 'Color Key' in 1903, the American Ornithologists' Union has issued the Third Edition (1910) of its 'Check-List of North American Birds.' This includes all approved additions to and changes in the preceding edition made since 1903 as well as rulings on a number of cases which were in abeyance at the time the first edition of the 'Color Key' appeared.
Mere changes in nomenclature not affecting the status of a species are given without comment in the preceding Systematic Table, which has been fully revised and brought up to date. To ascertain the correct, current name of any species or subspecies of North American bird the student, after determining its identity in the 'Color Key,' has only to refer to its number in the Systematic Table to learn whether any change has been made in nomenclature. In addition to actual changes in nomenclature due to the detection of errors in earlier names, it should be noted that a third name or trinomial is now employed for each race of a species, and also that an apostrophe is used in connection with the names of birds named for individuals. Throughout the 'Color Key,' therefore, alterations should be made when required by these two changes in method.
All other changes than these simple ones of names are included, with explanations, in this appendix, and the student is urged to make manuscript cross-references on the pages where such changes occur to avoid their being overlooked.
As far as possible the language of the original describer of the new subspecies of birds is here quoted, while the Ranges are mainly from the A. O. U. Check-List.
References to original sources of publication are given only with cases included in the first supplement to the Third Edition (1910) of the Check List. In all other instances reference to the original place of description, etc., is contained in the 'Check-List.'