MILLER AND REHN : NORTH AMERICAN MAMMALS. 303 



Arvicola insperatus Allen. 



1894. Arvicola insperatus ALLEN, Bull. Amer. mus. nat. hist., 



vi, p. 347. December 7, 1894. 

 TYPE LOCALITY. Custer, Black Hills, Ouster County, South 



Dakota. 



Regarded by Bailey (North Amer. fauna, no. 17, p. 20, June 6, 

 1900) as identical with Microtm pennsylvanicus modestus (p. 117). 



Arvicola microcephalus Rhoads. 



1894. Arvicola (Mynomes) microcephalus RHOADS, Proc. acad. 



nat. sci. Phila., p. 286. October 23, 1894. 

 TYPE LOCALITY. Lac la Hache, British Columbia, Canada. 

 Regarded by Bailey (North Amer. fauna, no. 17, p. 22, June 6, 

 1900) as identical with Microtus drummondii (p. 117). 



Microtus stonei Allen. 



1899. Microtus stonei ALLEN, Bull. Amer. mus. nat. hist., xn, 



p. 5, March 4, 1899. 



TYPE LOCALITY. Liard River, British Columbia, Canada. 

 Regarded by Bailey (North Amer. fauna, no. 17, p. 22, June 6, 

 1900) as identical with M. drummondii (p. 117). 



Microtus insularis Bailey. 



1898. Microtus insularis BAILEY, Proc. biol. soc. Washington, 

 xn, p. 86. April 30, 1898. 



Preoccupied by Lemmus insularis NILSSON (Ofver. k. vet. akad. 

 forh., Stockholm, i, p. 33, 1844) and replaced by Microtus neso- 

 philus BAILEY (p. 118). 



Microtus vellerosus Allen. 



1899. Microtus vellerosus ALLEN, Bull. Amer. mus. nat. hist., 

 xn, p. 7. March 4, 1899. 



TYPE LOCALITY. Liard River, British Columbia, Canada. 

 Regarded by Bailey (North Amer. fauna, no. 17, p. 48, June 6, 

 1900) as identical with M. mordax (p. 122). 



Microtus cautus Allen. 



1899. Microtus cautus ALLEN, Bull. Amer. mus; nat. hist., 



xn, p. 7. March 4, 1899. 

 TYPE LOCALITY. Hells Gate, Liard River, British Columbia, 



Canada. 



Regarded by Bailey (North Amer. fauna, no. 17, p. 48, June 6, 

 1900) as identical with M. mordax (p. 122). 



