NORTH AMERICAN RECENT MAMMALS. 301 



*Onychomys leucogaster missouriensis — -Continued. 



Type Locality. — Fort Union, near present town of Buford, 



Williams County, North Dakota. 

 Range. — Southeastern Alberta, southern Saskatchewan, north- 

 ern and eastern Montana, western North Dakota, and north- 

 eastern Wyoming. North to Calgary, Alberta, and Carlton, 

 Saskatchewan; east to Glenullin, North Dakota; south up the 

 Missouri River to Bozeman, Montana, and up the branches of 

 the Powder and Little Missouri Rivers into northeastern 

 Wyoming. Chiefly arid Transition. 



*Onychomys leucogaster arcticeps (Rhoads). 



1898. Onychomys arcticeps Rhoads, Proc. Acad. Nat. Sci. Phila- 

 delphia, p. 194. May 3, 1898. 



1914. Onychomys leucogaster arcticeps Hollister, Proc. U. S. 

 Nat. Mus., vol. 47, p. 439. October 29, 1914. 



Type Locality. — Clapham, Union County, New Mexico. 



Range. — Upper Sonoran Great Plains, from Wyoming and South 

 Dakota to Texas. North to the Big Horn River in Wyoming 

 and to the Cheyenne River in South Dakota; east to Bone- 

 steele. South Dakota, and Trego County, Kansas; south to 

 Fort Lancaster, Texas; and west to Bear River Divide in south- 

 western Wyoming, Golden and Salida, Colorado, and Santa 

 Rosa, New Mexico. 



t* Onychomys leucogaster brevicaudus Merriam. 



1891. Omjchomys leucogaster brevicaudus Merriam, North Amer. 

 Fauna, No. 5, p. 52. July 30, 1891. 



Type Locality. — Blackfoot, Bingham County, Idaho. 



Range. — Southern Idaho, extreme southwestern Wyoming, 

 northwestern Utah, and west across the northern half of 

 Nevada into Lassen, Plumas, and Mono Counties, California. 



^Onychomys leucogaster fuscogriseus Anthony. 



1913. Onychomys leucogaster fuscogriseus Anthony, Bull. Amer. 



Mus. Nat. Hist., vol. 32, p. 11. March 7, 1913. 

 Type Locality. — Ironside, Malheur County, Oregon. Altitude, 



4,000 feet. 

 Range. — Eastern Washington and Oregon, western Idaho, and 



northeastern California. South to Klamath Lake and the 



Madeline Plains. 



t*Oaychomys leucogaster melanophrys Merriam. 



1889. Onychomys leucogaster melanophrys Merriam, North Amer. 

 Fauna," No. 2, p. 2. ' October 30, 1889. 

 tl890. Onychomys melanophrys pallescens Merriam, North Amer. 

 Fauna, No. 3, p. 61. September 11, 1890. (Moki Pueblos, 

 Navaho County, Arizona.) 



