PREFAGE. vii 
“4. That any subsequent additions to the list be interpolated in 
systematic order, and bear the number of the species immediately 
preceding, with the addition of a figure (1, 2, etc., as the case may 
require), separated from the original number by a period or decimal 
point, thus giving the interpolated number a decimal form (e. g., 
243-1, etc.), in order that the original numbers may be permanent. 
* * * * * * * 
“6, That Giraud’s at present unconfirmed species of Texan birds 
be included in the List on Giraud’s authority. 
“7, That species and subspecies the zodlogical status of which 
cannot be satisfactorily determined, like, ¢. g., Regulus cuviert and 
Spiza townsendi of Audubon, be referred to a hypothetical list, in 
each case with a brief statement of the reasons for such allocation. 
“8. That a list of the fossil species of North American birds be 
added as an Appendix to the List proper. 
“o. That the names of subgeneric and supergeneric groups of 
North American birds be included in the List in systematic order, 
to the end that the List may represent a classification as well as a 
nomenclature of the birds. 
“ro. That references be given to the original description of the 
species,.and to the publication where the name as adopted in the 
List was first used; that the number borne by each species and sub- 
species in the Lists of Baird, 1858, of Coues, 1873, of Ridgway, 
1880, and of Coues, 1882, be bracketed in chronological order after 
the synonymatic references. 
“rr. That a summary statement of the.habitat of each species 
and subspecies, with special reference to its North American range, 
be included in the List. 
“12. That the name of each bird shall consist of its generic 
without its subgeneric name, and of its specific with its subspecific 
name, if it have one, without the intervention of any other term. 
* * * * * * * 
“14. That every technical name be followed by a vernacular name, 
selected with due regard to its desirability. 
‘‘75. That the name of each species and subspecies be followed 
by the name of the original describer of the same, to be enclosed in 
parentheses when it is not also the authority for the name adopted. 
