April, 1922 habits of the common mole 169 



this manner. Of the various spring traps set in runways, one is 

 of equal value with another if properly set, but on account of 

 the use to which the skins may be put, the harpoon type of 

 trap is the least desirable. 



Scalopiis aquaticus machriniis (Rafinesque.) will likely con- 

 tinue to be an animal small in numbers among us on account 

 of its breeding habits, for it breeds only in early spring of each 

 year and the number at birth is small, averaging four or five. 

 On account of its food habits and its depredations in lawns and 

 cultivated fields, it will always be of economic value, and of 

 special scientific interest on account of its subterranean habits 

 and high degree of specialization. 



LITERATURE CITED 



Jackson, Hartley H. T. 



1915. "A Review of the American Moles." Bureau of Biological Survey. 

 N. A. Fauna No. 38. 



SCHEFFER, ThEO. H. 



1917. "Trapping Moles and Utilizing Their Skins." U. vS. Dept. of Agr. 

 Farmers Bui. 832. 



MOSLEY, E. L. 



Unpublished Work. "Natural History of the Mammals of the Central and 

 Eastern States." 



