Zygogeomys, Thomomys. 
471 
730. Zygogeomys, Merriam, 1895. 
Merriam, North-Amer. Fauna, No 8, 1895, p. 195. 
4760.trichopus, Merriam - (3474). 
731. Thomomys, Wied, 1839. 
Geomys, p„ Richards., 1828; Diplostoma, p., Richards, 1829; 
Oryciomys, Eyd. et Gerv., 1836. 
Maximilian von Wied-Neuwied, Nova Acta Acad. Leopold., XIX, 1839. 
pars 1, p. 377. 
4761. bulbivorus, Richardson — (.7475); Elliot, 
Field Columb. Mus., II, 1901, p. 222, fig. 52. 
4762. nevadensis. Merriam — ( 347o B ); Elliot, 
1. c., 1901, p. 223. 
4763. leucodon, Merriam — (347 7 B ); Elliot, 
1. c., 1901, p. 223. 
a. — navus, Merriam, Proc. Biol. Soc. 
Wash., 1901, p. 112. 
4764. operarius. Merriam — (347 7 C ); Elliot, 
1. c., 1901, p. 223. 
47 65. bottai, Eydoux et Gervais — (3473); Elliot, 
1. c., 1901, p. 223. 
a. — pallescens, Rhoads — (3476 a); Elliot, 
1. c., 1901, p. 224. 
4766.laticeps, Baird — (.7477); Elliot, 1. c., 
1901, p. 224. 
4767. townsendi, Richardson — (3478); Elliot, 
1. c., 1901, p. 224. 
4768. monticola, Allen — (3479); Elliot, 1. c., 
1901, p. 225; Merriam, N.-Am. Fauna, 
16, 1899, p. 97. 
a. — pinetorum, Merriam, N.-Am. Fauna, 
No 16, 1899, p. 97; Elliot, 1. c., 1901, 
p. 225. 
Oregon (ad fl. 
Columbia), usque ad 
Californiam, in Sept. 
San Francisco. 
Nevada (Austin). 
Oregon (Rogue River 
Valley, Grant Pass). 
California, 
(Red Bluff). 
California Orient., 
Inyo Co., (Keeler, 
Owens Late). 
California Centrali et 
Merid. (Mouterey). 
California Merid., 
Vallo San Bernardino, 
(Grapelands). 
California Sept., 
(Humboldt Bay). 
Wyoming 
(M tes Rupestres), et 
ad fl. Columbia. 
California Sept., 
Eldorado Co., 
(M s Talae), a Sinu 
San Francisco ad 
M s Shasta, Nevada 
Sept.-Occid. 
Siskiyou Co., 
(Sisson). 
