132 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Subgenus SYNAPTOMYS Baird. 



* Synaptomys cooperi Baird. 



1857. S[ynaptomys~] cooperi BATED, Maram. N. Amer., p. 558. 

 1885. Synaptomys cooperi TRUE, Proc. U. S. nat. raus., vn 



(1884), p. 596. 1885. 

 TYPE LOCALITY. Unknown, probably northern New Jersey. 



Synaptomys fatuus Bangs. 



1896. Synaptomys fatuus BANGS, Proc. biol. soc. Washing- 

 ton, x, p. 47. March 9, 1896. 

 TYPE LOCALITY. Lake Edward, Quebec, Canada. 

 Regarded by Rhoads (Proc. acad. nat. sci. Phila., 1897, p. 306, 

 June, 1897) as a form of S. cooperi. 



Synaptomys helaletes Merriam. 



1896. Synaptomys helaletes MERRIAM, Proc. biol. soc. Wash- 

 ington, x, p. 59. March 19, 1896. 



TYPE LOCALITY. Dismal Swamp, Norfolk County, Virginia. 

 According to Rhoads (Proc. acad. nat. sci. Phila., 1897, p. 305, 

 June, 1897), this should stand as Synaptomys cooperi stonei 

 (RHOADS) (Synaptomys stonei Rhoads, Amer. nat., xxvii, p. 53> 

 January 11, 1893; type locality, Mays Landing, Atlantic County, 

 New Jersey). 



Synaptomys helaletes gossii Merriam. 



1896. Synaptomys helaletes gossii MERRIAM, Proc. biol. soc. 



Washington, x, p. 60. March 19, 1896. 

 TYPE LOCALITY. Neosho Falls, Woodson County, Kansas. 

 According to Rhoads (Proc. acad. nat. sci. Phila., 1897, p. 307, 

 June, 1897), this should stand as Synaptomys cooperi gossi. 



Subgenus MICTOMYS True. 



1894. Mictomys TRUE, Diagnoses of new North American 

 mammals, p. 2. April 26, 1894. (Reprint: Proc. TJ. S. nat. mus.,. 

 xvn, p. 242. November 15, 1894.) Type. Mictomys innuitus 

 TRUE. 



