148 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Thomomys perpallidus (Merriara). 
1886. Thomomys talpoides perpallidus Meeriam, Science, viii, 
p. 588. December 24, 1886. 
1893. Thomomys perpallidus Allen, Bull. Amer. mus. nat. 
hist., Y, p. 64. 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 fulrus 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., 
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., iii, p. 518. 
1857. Thomomys tcdpoides Baird, Mamm. N. Amer., p. 403. 
1885. Thomomys talpjoides talpoides True, Proc. U. S. nat. 
mus., YU (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 urnhrinus Richardson, Fauna Boreali-Ameri- 
cana, i, p. 202. 
1857. Thomomys urnhrinus Baird, Mamm. N. Amer., p. 399. 
1885. Thomomys talpoides umbrinus True, Proc. U. S. nat» 
mus., VII (1884), p. 599. 1885. (Part.) 
