124 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



1896. JT'[>crotHS^ mogoHoneasis Miller, Proe. biol. soc. 

 Washington, xi, p. 68. April 21. 1^96. 



Type locality. — Bakers Butte. Mogollon Mountains, Yava- 

 pai County. Arizona. 



*Microtus 2santhognathus (Leacli). 



1815. Arvicohx .I'aiitliogaathii Leach, Zool. miscell., i, p. 60. 

 1885. Arvicola xanthognatJi'.is TiiY^, Proc. U. 8. nat. luus., 



VII (1884), p. 597. 1885. 

 1896. M\icrotus] xanthognatJius Miller, Xortli Ainer. fauna, 



no. 12, p. 66. July 23. 1896. , 

 Type locality. — Hudson Bay. 



Microtus chrotorrhinus (Miller). 



1894. Arcicola chrotorrhinus Miller, Proc. Boston soc. nat. 

 hist., XXVI, p. 190. March 24, 1894. 



1896. 3ficrotus cJirotorrh!niisTiX^G^,VYOc. Ijiol. soc. Wash- 

 ington, X, p. 49. :March 9, 1896. 



Type locality. — Head of Tuckerman's Iia\iue, Mount Wash- 

 ington, Coos County, XeAv Hampshire. Altitude, 5300 feet. 



Microtus chrotorrhinus ravus Bangs. 



1898. Microtus chrotorrhinus ravus Bangs, Proc. bid. soc. 



Washington, xii, p. 188. Xoveniber 16. 1898. 

 Type locality. — Black Bay, Strait of Belle Lsle, Labrador. 



Subgenus Arvicola Lacep^de. 



1799. Arvicola Lacepede, Tableau des divisions, sous-divisions, 

 ordres et genres des mammiferes, p. 10 (Published as supplement 

 to Discours d"ouverture et de cloture du cours d'histoire naturelle, 

 et tableaux methodiques des mammiferes et des oiseaux). Type. — 

 Arvicola amphibius Lacepede == JIus terrestris Lixxaeus. 



Microtus richardsoni (DeKay i. 



1>^42. ArvicoJa richardsoni DkKxy, Zool. Xew York, mamm., 



p. 91. 

 1^94. Aidacomys richardsoni Rhoads. Proc. acad. nat. sci. 



Phila., p. 288. October 23, 1894. 

 1897. \^J\ficrotus'] richardsoni Trouessart, C\atal. mamm., 



pt. Ill, p. 565. 



