204 BULLETIN 79, UNITED STATES NATIONAL MUSEUM. 



t*Hodomys vetulus Merriam. 



1894. Hodomys vetulus Merriam, Proc. Acad. Nat. Sci. Phila- 

 delphia, p. 236. September 24, 1894. 

 Type Locality.— Tehuacan, State of Puebla, Mexico. 



Genus XENOMYS Merriam. 



1892. Xenomys Merriam, Proc. Biol. Soc. Washington, vol. 7, 

 p. 160. September 29, 1892. Type, Xenomys nelsoni Mer- 

 riam. 



t*Xenomys nelsoni Merriam. 



1892. Xenomys nelsoni Merriam, Proc. Biol. Soc. Washington, 

 vol. 7, p. 161. September 29, 1892. 



Type Locality. — Hacienda Magdalena, between, the city of 

 Colima and Manzanillo, State of Colima, Mexico. 



Subfamily Microtinae.^ 



Genus SYNAPTOMYS Baird.^ 



1857. Synaptomys Baird, Mamm. N. Amer., p. 558. Type, 

 Synaptomys cooperi Baird. 



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). 



1 Genera and subgenera revised by Miller, North Amer. Faima, No. 12, July 23, 1896. 



2 Revised by Merriam, Proc. Biol. Soc. Washington, vol. 10, pp. 55-64, March 19, 1896, but so many 

 species have subsequently been described that the forms are here entered alphabetically. 



