148 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Thomomys perpallidus (Merriam). 



1886. Thomomys talpoides perpallidus MERRIAM, Science, vm, 



p. 588. December 24, 1886. 

 1893. Thomomys perpallidus ALLEN, Bull. Amer. mus. nat. 



hist., v, p. 54. April 28, 1893. 



TYPE LOCALITY. Colorado Desert, San Diego County, Cali- 

 fornia. 



Rhoads (Proc. acad. nat. sci. Phila., 1895, p. 37, March 19, 1895) 

 suggests that this may eventually stand as Thomomys fulvus per- 

 pallidus. 



Thomomys quadratus Merriam. 



1897. Thomomys quadratus MERRIAM, Proc. biol. soc. Wash- 

 ington, xi, p. 214. July 15, 1897. 

 TYPE LOCALITY. The Dalles, Wasco County, Oregon. 



Thomomys rufescens Wied. 



1839. Thomomys rufescens WIED, Nova acta phys. med. acad. 



caes. Leop.-Carol., xix, pt. i, p. 378. 

 1893. Thomomys rufescens ALLEN, Bull. Amer. mus. nat. hist., 



v, p. 62. April 28, 1893. 



TYPE LOCALITY. Missouri River, exact locality not known 

 (see Allen, Bull. Amer. mus. nat. hist., v, p. 62, April 28, 

 1893). 



Regarded by Allen (Bull. Amer. mus. nat. hist., v, p. 67, April 

 28, 1893) as questionably distinct from T. talpoides. 



* Thomomys talpoides (Richardson). 



1828. Cricetus talpoides RICHARDSON, Zool. journ., in, p. 518. 

 1857. Thomomys talpoides BAIRD, Mamm. N. Amer., p. 403. 

 1885. Thomomys talpoides talpoides TRUE, Proc. U. S. nat. 



mus., vii (1884), p. 598. 1885. (Part.) 



TYPE LOCALITY. Probably Saskatchewan, Canada (see Allen, 

 Bull. Amer. mus. nat. hist., v, p. 55, April 28, 1893). 



* Thomomys talpoides umbrinus (Richardson). 



1829. Geomys umbrinus RICHARDSON, Fauna Boreali-Ameri- 

 cana, i, p. 202. 



1857. Thomomys umbrinus BAIRD, Mamm. N. Amer., p. 399. 

 1885. Thomomys talpoides umbrinus TRUE, Proc. U. S. nat. 

 mus., vii (1884), p. 599. 1885. (Part.) 



