'1910 J Recent Literature. 469 



Third Edition. 



Number of species 802 



" " subspecies 394 



Total number of forms 1196 



Species omitted 20 



" added 23 



" net increase 3 



Subspecies added 148 



" omitted 14 



" raised to species 4 



" net gain 130 



General Summary. 



Total net increase, species 34 



" " " subspecies 211 



Total species added 83 



Species removed (as synonyms, 5 ; as extralimital, 15; as hybrids, 



3) 23 



Species reduced to subspecies 26 



Total subspecies added 247 



Subspecies raised to species 5 



" reduced to synonyms 31 



Total species of casual or accidental occurrence (numbers in brackets) 1 19 



Brackets removed from 17 



Bracketed species eliminated 14 



" " remaining in 3d ed 88 



The most obtrusive changes, as well as the most unwelcome, in the 

 several editions of the Check-List, are those of nomenclature. They are 

 due to a better understanding of the status and relations of the elements 

 that enter into the Check-list, from subspecies to families, due to increase 

 of material and more thorough acquaintance with the literature of the 

 subject, and to the strict enforcement of currently accepted rules of nomen- 

 clature. These may be tabulated with approximate accuracy as follows: 



Family names changed 5 



Subfamilies raised to families 10 



Subfamily names added 3 



Generic names changed 60 



Subgenera raised to genera 34 



Genera added 8 



Subgenera added 8 



Specific names changed 52 



Subspecific names changed 38 



