thomomys. 279 



Richardson's Pocket Gopher. 



Type locality. Probably Saskatchewan, Canada. 



Geogr. Distr. Saskatchewan region south to Missouri region. 



a. Thomoniys talpoides rufescens (Maximilian). 



Thomontys rufescens Max., Nov. Act. Phys. Med. Acad. Caes. Leop.- 



Carol., XIX, Pt. i, 1839, p. 378. 

 Thomontys talpoides rufescens Elliot, Syn. N. Am. Mamm., F. C. M. 

 Pub., II, 1901, p. 227. Zool. Ser. 

 RuFESCENT Pocket Gopher. 



Type locality. Missouri River; exact locality unknown. 

 Geogr. Distr, Upper Missouri and Valley of the Saskatchewan, 

 Canada. 



689. Thomomys bridgeri Merriam. 



Thomontys bridgeri Merr., Proc. Biol. Soc. Wash., xiv, 1901, p. 113. 

 Bridger's Pocket Gopher. 



Type locality. Fort Bridger, Uinta County, Wyoming, 



Geogr. Distr. Wyoming. Range unknown. 



Genl. Char. Size large. Skull with parallel temporal ridges; 

 rostrum and nasals long, notched posteriorly, otherwise similar to 

 those of T. talpoides. 



Color. Above chestnut to buffy brown mixed with black; be- 

 neath washed with buffy fulvous; chin, ear patch, and entrance to 

 pouches dusky; feet whitish. 



Measurements. Total length, 237 ; tail vertebrae, 71 ; hind foot, 34. 



690. Thomomys melanops Merriam. 



Thomomys melanops Merr., Proc, Biol. Soc. Wash., xiii, 1899, 

 p, 21. Elliot, Syn. N. Am. Mamm., 11, 1901, p, 227. Zool. Ser. 

 Black-faced Pocket Gopher. 



Type locality. Solduck Trail, Olympic Mountains, Clallam 

 County, Washington. 



Geogr. Distr. Olympic Mountains, Washington. High elevation. 



691. Thomomys hesperus Merriam. 



Thomomys hesperus Merr., Proc. Biol. Soc. Wash., xiv, 1901, p. 116. 

 Western Pocket Gopher. 



Type locality. Tillamook, Tillamook County, Oregon. 



Geogr. Distr. Oregon. Range unknown. 



Genl. Char. Size small. Interparietal large, triangular; bullae small. 



Color. Above deep rufous; beneath buffy to salmon fulvous; 

 nose, ear patch, and orbital ring dusky; tail above dark, beneath 

 whitish; fore and hind feet whitish. 



Measurements. Total length, 175; tail vertebrae, 54; hind foot, 24, 



