246 MICROTUS. 



Color. Above dull umber brown; belly buffy gray; feet and tail 

 brownish gray. 



Measurements. Total length, 152; tail vertebrae, 34; hind foot, 

 20. Skull: basal length, 24.5; length of nasals, 7.5; zygomatic 

 breadth, 16; mastoid breadth, 124; alveolar length of upper molar 

 series, 7.2. 



592. Microtus fulviventer Merriam. 



Microtus fulviventer Merr., Proc. Biol. Soc. Wash., xii, 1898, 

 p. 106. Elliot, Mamm. Middle Amer. & W. Indies, F. C. M. 

 Pub., IV, Pt. I, 1904, p. 301. Zool. Ser. 

 Fulvous-bellied or Oaxaca Meadow Vole. 



Type locality. Cerro San Felipe, State of Oaxaca, Mexico. Alti- 

 tude, 10,200'feet. 



Geogr. Distr. State of Oaxaca, Mexico. 



593. Microtus mogollonensis (Meams). 



Arvicola mogollonensis Meams, Bull. Am. Mus. Nat. Hist. N. Y. 



1890, p. 283. 

 Microtus mogollonensis Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 II, 1901, p. 192. Zool. Ser. 

 MoGOLLON Mountains Meadow Vole. 



Type locality. Baker's Butte, Mogollon Mountains, Yavapai 

 County, Arizona. 



Geogr. Distr. Plateau of central Arizona. 



594. Microtus xanthognathus (Leach). 



Arvicola xanthognatha Leach, Zool. Misc., i, 1814, p. 60. 



Microtus xanthognathus Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 II, 1901, p. 193. Zool. Ser. 

 Yellow-cheeked Meadow Vole. 



Type locality. Hudson Bay. 



Geogr. Distr. Northwestern Canada and Alaska, from central 

 Alberta north to the Arctic Coast, and west to Central Alaska. 



595. Microtus chrotorrhinus (Miller). 



Arvicola chrotorrhinus Miller, Proc. Bost. Soc. Nat. Hist., xxvi, 



1894, p. 190. 

 Microtus chrotorrhinus Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 II, 1901, p. 193. Zool. Ser. 

 Rock Meadow Vole. 



Type locality. Head of Tuckerman's Ravine, Mount Washington, 

 Coos County, New Hampshire. Altitude, 5,300 feet. 



Geogr. Distr. The Catskills, New York, to New Hampshire north- 

 ward into New Brunswick to Trowser's Lake and also central Quebec. 



