MICROTUS. 237 



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

 II, 1901, p. 181. Zool. Ser. 

 Drummond's Meadow Vole. 



Type locality. Rocky Mountains, near Jasper House, Alberta, 

 Canada. 



Geogr. Distr. Hudson Bay to Alaska, and from the United States 

 northern boundary to Fort Anderson, Northwest Territory. 



562. Microtus aztecus (Allen). 



Arvicola {Mynomes) aztecus Allen, Bull. Am. Mus. Nat. Hist. 



N. Y., i893,p. 73. 

 Microtus aztecus Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 

 1 901, p. 182. Zool. Ser. 

 Aztec Meadow Vole. 



Type locality. Aztec, San Juan County, New Mexico. Altitude, 

 5,900 feet. 



Geogr. Distr. Estes Park (Allen), Colorado, to valley of the San 

 Juan River, New Mexico. 



563. Microtus enixus Bangs. 



Microtus enixus Bangs, Amer. Nat., xxx, 1896, p. 105 1. Elliot, 

 Syn. N. Am. Mamm., F. C. M. Pub., 11, 1901, p. 182. Zool. 

 Ser. 

 Large Labrador Meadow Vole. 



Type locality. Hamilton Inlet, Labrador. 



Geogr. Distr. Eastern coast of Labrador from Hamilton Inlet to 

 Ungava Bay, Labrador. 



564. Microtus aphorodemus Preble. 



Microtus aphorodemus Preble, N. Am. Faun., No. 22, 1901, p. 52. 

 Barren Ground Meadow Vole. 



Type locality. Barren Grounds near the mouth of the Thlewiaza 

 River, Keewatin, Canada. 



Geogr. Distr. Barren Grounds, Arctic America. Range un- 

 known. 



Genl. Char. Similar to M. drummondi, but larger and skull 

 heavier. 



Color. Above dark yellowish bister mixed with yellow tipped 

 hairs ; beneath white or light plumbeous, sometimes tinged with light 

 brown. 



Measurements. Total length, 190; tail vertebrae, 60; hind foot, 

 20. Skull: basal length, 28; length of nasals, 7.6; zygomatic breadth, 

 16.5; mastoid breadth, 12.6; alveolar length of upper molar series, 7. 



