"1910 J Recent Literature. 467 



these the general range is first indicated, then the breeding range and the 

 winter range, and finally the localities of its casual or accidental occurrence. 



(3) The species are not numbered, and subspecies are designated by 

 letters. The numeration of the previous editions is given at the right of 

 the English name, in brackets, as a concordance. The old enumeration 

 is thus available for use. 



(4) The concordance to previous Check-Lists (those of Baird, Coues, 

 and Ridgway) is omitted. 



(5) The secondary references under species and subspecies are also 

 omitted, only the reference to the place of original description being given. 



(6) This reference is followed by a statement (in parenthesis) of the 

 type locality of the species or subspecies, usually as given by the original 

 author, but in many cases in more definite and exact terms. 



(7) The type species of each genus and subgenus is not only given as 

 before, but the manner in which it came to be the type is also stated, this 

 being an item of information of the utmost interest to the nomenclator. 



(8) The generic and specific names are marked for accent. 



(9) Two maps are included, the first, bound in as a frontispiece, is 

 printed in color to show the life zones of North America; the other, un- 

 colored, and placed at the beginning of the systematic list, gives the locali- 

 ties especially mentioned in the Check-List, particularly type localities 

 and others zoologically of historic interest, many of which are not indi- 

 cated on modern maps. 



(10) A further departure from previous editions is the elimination of 

 all the species resting solely on the unconfirmed records of Giraud's ' Birds 

 of Texas,' and of a few others included on early unsatisfactory records 

 still unconfirmed, and which, in the light of present knowledge, seem 

 highly improbable. 



The geographical boundaries of the Check-List remain as heretofore, 

 that is, they include Greenland and the peninsula of Lower California. 

 The classification is also unchanged — a feature that may evoke more or 

 less criticism in certain quarters. The preface, however, thus states the 

 case: "It was at first the intention of the Committee to modernize the 

 sequence of the groups. The fact, however, that the present systems of 

 classification in ornithology are admittedly tentative, and difier widely 

 among themselves, it seemed best, from the standpoint of convenience, 

 to continue the old Check-List system unchanged, since the users of the 

 Check-List are familiar with the present order of arrangement and would 

 regret the annoyance that a radical change from it would cause. In 

 deference to this known widespread preference, the old order of arrange- 

 ment has been continued." Preference is expressed, however, for the 

 well knowTi Giidow system, with modifications, an abstract of which 

 system is given, with the Check-List equivalents added in brackets. 



For a similar reason it was decided to refrain from giving a new con- 

 secutive numbering to the species, since it would necessarily differ widely 

 from that of previous editions, owing to the interpolation of thirty-four 



