394 BULLETTlSr 128, UNITED STATES NATIONAL, MUSEUM. 



Subgenus SYNAPTOMYS Baird. 



t*Synaptomys cooperi Baird. 



1857. S[ynaptomys] cooperi Baird, Mamm. N. Amer., p. 558. 

 1885. Synaptomys cooperi True, Proc. U. S. Nat. Mus., vol. 7 

 (1884), p. 596. 1885. 



1893. Synaptomys stonei Rhoads, Amer. Nat., vol. 27, p. 53. 

 January, 1893. (Mays Landing, Atlantic County, New 

 Jersey.) 



Type Locality. — Unknown, probably northern New Jersey. 



* Synaptomys fatuus Bangs. 



1896. Synaptomys fatuus Bangs, Proc. Biol. Soc. Washington, 



vol. 10, p. 47. March 9, 1896. 

 Type Locality. — ^Lake Edward, Quebec, Canada. 



Regarded by Rhoads (Proc. Acad. Nat. Sci. Philadelphia, 1897, p. 306. 

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



t*Synaptomys helaletes helaletes Merriam. 



1896. Synaptomys helaletes Merriam, Proc. Biol. Soc. Wash- 

 ington, vol. 10, p. 59. March 19, 1896. 

 Type Locality. — Dismal Swamp, Norfolk County. Virginia. 



According to Rhoads (Proc. Acad. Nat. Sci. Philadelphia, 1897, p. 305, 

 June, 1897), this should stand as Synaptomys cooperi stonei (Rhoads). 



t*Synaptomys helaletes gossii (Coues). 



1877. Arvicola (Synaptomys) gossii Coues, Monogr. N. Amer. 

 Rodentia, p. 235 (published as synonym of Synaptomys coop- 

 eri, but name stated to apply to Kansas specimens, description 

 and measurements of which are printed on p. 236). 



1896. Synaptomys helaletes gossii Merriam, Proc. Biol. Soc. 

 Washington, vol. 10, p. 60. March 19, 1896. 



Type Locality. — Neosho Falls, Woodson County, Kansas. 



According to Rhoads (Proc. Acad. Nat. Sci. Philadelphia, 1897, p. 307, 

 June, 1897), this should stand as Synaptomys cooperi (jossi. 



Subgenus MICTOMYS True.s^ 



1894. Mictomys True, Diagnoses of new North American Mam- 

 mals, p. 2. April 26, 1894. (Reprint: Proc. U. S. Nat. Mus., 

 vol. 17, p. 242. November 15, 1894.) Type, Mictomys innu- 

 itus True. 



Synaptomys andersoni Allen. 



1903. Synaptomys {Mictomys) andersoni Allen, Bull. Amer. Mus. 



Nat. Hist., vol. 19, p. 554. October 10, 1903. 

 Type Locality. — Level Mountains, northern British Columbia, 

 Canada. 



M According to HoUister (Canadian Alpine Joiimal, Special Number, pp. 19-20, Feb. 17, 1913), the forms 

 of Synaptomys inhabiting northwestern North America are probably nothing more than slightly differ- 

 entiated subspecies of S. horealia; the forms described as wraTigeli and andersoni are probably not separable 

 from dalU. 



