MILLEK AND REHN : NORTH AMERICAN MAMMALS. 303 



Arvicola insperatus Allen. 



1894. Aroicola insperatus Allex, Bull. Amer. mus. nat. hist., 



VI, p. 347. December 7, 1894. 

 Type locality. — Custer, Black Hills, Custer County, South 

 Dakota. 

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

 1900) as identical with. 3ficroti(s pennsylvanicus modestus (j). 117). 



Arvicola microcephalus Rhoads. 



1894. ^irricd/a {My names) inicr-oceph.aJus Rhoads, Proc.acad. 



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

 Type locality. — Lac la Ilache, British Columbia, Canada. 

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

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



Microtus stonei Allen. 



1899. Jlicrottis stonei Allex, Bull. Amer. raus. nat. hist., xii, 



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 31. drumrno7idii (p. 117). 



Microtus insularis Bailey. 



1898. Jlicrotus insularis Bailey, Proc. biol. soc. Washington, 

 XII, p. 86. April 30, 1898. 



Preoccupied by Lentnnis insularis l^ihsso^ (Ofver. k. vet. akad. 

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

 pjhilus Bailey (p. 118). 



Microtus vellerosus Allen. 



1899. Microtus vellerosus Allen, Bull. Amer. nius. nat. hist., 

 XII, 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 31. mordax (p. 122). 



Microtus cautus Allen. 



1899. 3f!crotus cautus Allen, Bull. Amer. mus. nat. hist., 



XII, p. 7. .^larch 4, 1899. 

 Type locality. — Hells Gate, Liard River, British Columbia, 

 Canada. 

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

 1900) as identical with 31. mordax (p. 122). 



