NORTH AMERICAN RECENT MAMMALS. 247 



t*Thomomys nelsoni Merriam. 



1901. Thomomys nelsoni Merriam, Proc. Biol. Soc. Wasliingtuu, 



vol. 14, p. 109. July 19, 1901. 

 Type Locality. — Parral, Cliihualiua, Mexico. 

 Range. — Central Chihuahua, from Gallego south to Parral. 



t*Thomomys sheidoni Bailey. 



1915. Thomomys sheidoni Bailey, North Amer. Fauna, No. 39, 



p. 93. November 15, 1915. 

 Type Locality. — Santa Teresa, Nayarit, Mexico. Altitude, 



6,800 feet. 

 Range. — Transition Zone on the Sierra Madre, Mexico, from 



northern Chihuahua south to Guanajuato. 



t*Thomoniys goldmani Merriam. 



1901. Thomomys goldmaniM^EB,RiAM,FToc. Biol. Soc.Washington, 



vol. 14, p. 108. July 19, 1901. 

 Type Locality.— Mapimi, Durango, Mexico. 

 Range. — Eastern Durango, from Mapimi south to Durango City. 



t*Thomomys perditus Merriam. 



1901. Thomomys ■perditus Merriam, Proc. Biol. Soc. Washington, 



vol. 14, p. 108. July 19, 1901. 

 Type Locality. — Lampazos, Nuevo Leon, Mexico. 

 Range. — Eastern Coahuila and western Nuevo Leon, north to 



Rock Springs and Castle Mountains, western Texas. 



*Thomomys atrovarius Allen. 



1898. Thomomys atrovarius Allen, Bull. Amer. Mus. Nat. Hist., 



vol. 10, p. 148. April 12, 1898. 

 Type Locality. — Tatemeles, Sinaloa, Mexico. 

 Range. — Coastal Plain of southern Sinaloa and Tepic, from 



Mazatlan south to Colomo. 



taZpo'k&s-group . 



*Thomomys talpoides talpoides (Richardson). 



1828. Cricetus talpoides Richardson, Zool. Journ., vol. 3, p. 518. 

 1857. Thomomys talpoides Baird, Mamm. N, i\jner., p. 403. 

 1885. Thomomys talpoides talpoides True, Proc. V. S. Nat. Mus. 



vol. 7 (1884)", p. .598. 1885. (Part.) 

 Type Locality. — Near Fort Carlton, Saskatchewan, Canada. 



(See Allen, Bull. Amer. Mus. Nat. Hist., vol. 5, p. 55, April 28, 



1893, and Bailey, North Amer. Fauna, No. 39, p. 97, November 



15, 1915.) 

 Range. — Plains of Saskatchewan and Alberta; south in Montana 



to Great Falls and the Big Snowy Mountains. 



