23 



been reduced to subgeneric rank, and several others en- 

 tirely canceled. 1 



In this connection we will consider North America not 

 in its continental or geographic sense but as commonly 

 faunally limited, or as defined in the A. O. U. Check-List 

 of North American Birds, namely, North America north of 

 Mexico but including Lower California. In the following 

 statistical comparison we will also exclude the marine 

 mammals, as the Whales and Porpoises. Taking the 

 species by. ordinal groups we have the following results : 



Marsupials (Opossums) : 1884, 1 species; 1894, 1 species and 1 subspecies. 



Edentates (Armadillos, etc.): 1884, 1 species; 1894, 1 species. 



Ungulates (Deer. Antelope, Sheep, etc.); 1884, I2 species and 3 subspecies; 

 1894, 12 species and 4 subspecies. 



Rodents (Squirrels, Spermophiles, Gophers, Mice, Rats, Pocket Mice, Kan- 

 garoo Rats, Porcupines, Hares, etc.): 1884, 80 species and 34 subspecies; 1894, 

 231 species and 105 subspecies, — an increase of 151 species and 71 subspecies, 

 or nearly 200 per cent. 



Bats : 1884, 15 species; 1894, 25 species, — an increase of 60 per cent. 



Insectivores (Moles and Shrews) : 1884, 19 species and I subspecies; 1894, 

 30 species and 3 subspecies, — an increase of 65 per cent. 



Carnivores (Bears, Wolves, Cats, Skunks, Weasels, etc.) : 1884, 53 species 

 and 4 subspecies ; 1894, 69 species and 12 subspecies, — an increase of 42 

 per cent. 



As would be expected, the increase proves to be greatest 

 among the smaller nocturnal and burrowing species, as the 

 Pocket Mice, Kangaroo Rats, Gophers, Spermophiles, 

 Voles and other Field Mice, Shrews and Moles, where the 

 increase in different groups ranges from 60 to 200 per cent, 

 as against 15 to 40 per cent, among the Ungulates and 



1 In October, 1892, Mr. Walter E. Bryant published a very useful paper en- 

 titled " Recent Additions to the North American Mammal Fauna " (Zoe, III., 

 pp. 201-223), givhig a list of additions made between 1884 and October, 

 1892, with notes on the changes that had occurred in nomenclature. Although 

 restricted to that part of North America north of Mexico, the changes in gen- 

 eric names number 17, mainly due to the revival of older names for those cur- 

 rent in 1884, or through the raising of subgeneric names to generic rank, or 

 the relegation of generic names to subgeneric rank, with about three subgenera 

 and five generic names proposed for new groups or for pre-occupied names. 

 The paper records 190 species and subspecies as actual additions to the list 

 of 1884. 



