258 EXPLORATION OF THE CANONS OF THE COLORADO. 
described, in 1839, by Dr. Bachman, from Richardson's MSS., upon speci 
mens in the Philadelphia Academy, said to be from the "Columbia River.'' 
These two names may be treated together, as they are unquestionably the 
same. These specimens, apparently, were figured by Audubon; the plate is 
too highly colored, the richness of the tint there represented being only 
matched in strong cases ofumbrinus; but exactly the same wrong tawny col 
oration is on the same author's plate of "douglasii," and need not stand in 
the least in the way of the identification which I make. The same original 
specimens were taken by Dr. LeConte as the basis of his Geomys rufescens, 
and were examined by Professor Baird, who failed to see any decided differ 
ence from " douglasi." I have not taken occasion to handle these specimens 
myself; but Dr. Bachman's original description gives nothing incompatible 
with the characters of the present species, and the balance of his account 
inclines here. From the locality, it is most likely that these specimens are 
more or less intermediate between pure talpoides and " douglasi." It becomes, 
in fact, a matter of indifference whether we allocate the quotations of 
''borealis" here or under the next head. 
Respecting the T. rufescens of Maximilian, I have nothing to add to 
what has been already said. "Geomys unisulcatus" of Gray, apparently only 
a museum-name, is here assigned by the author himself. The specimens col 
lected by the United States Geological Survey of the Territories, catalogued 
by Mr. Merriam as "fulvus,'' belong here, as I ascertain by inspection. 
THOMOMYS TALPOIDES BULBIVORUS, (Rich.) Coues. 
Diplostomal lulbivorum, RICH., F. B. A. i, 1829, 206, pi. 18 B (lettered douglasii by mistake). EICII., Zool. 
Voy. Blossom, 1839, pp. 9 and 13.* 
Ascomys bulbivorus, WAGN., Suppl. Schreb. iii, 1843, 387. (Compiled.) 
Geomys bulbivorus, DEKAY, N. Y. Fu. 1842, 92. (Compiled from Bichardson.) SCHINZ, Syn. Mamm. ii, 
1845, 135. (Compiled; quotes D. " bulbiferum " ; gives wrong locality). LECOXTK, Proc. 
Acad. Nat. Sci. Phila. 1852, 162. (Compiled from Richardson.) 
Pseudostoma bulbivorum, AUD. & BACH., Q. N. A. iii, 1854, 337. (Compiled from Richardson.) 
Geomys (Thomomys) bulbivorus, GIEB., Siiug. 1855, 530. (Compiled from Richardson ) 
Thomomys bulbivorus, BAIRD, M. N. A. 1857, 389, pi. 50, f. 3 a-g, and pi. 52, f. I a-y. (Identifies the 
common Californian animal with this species of Richardson's, and minutely describes it.) 
BAIRD, P. R. R. Rep. x, 1859, Williamson's Route, Mamm. 82. (Tejou, Cal.) KENNERLY, 
P. R. R. Rep. x, 1859, Whipple's Route, Mamm. 13, pi. 11. (California.) GERR., Cat. Bones 
Brit. Mus. 1862, 223. (California.) 
Oryctomys (Saccophorus) bottce, EYD. & GERV., Mag. de Zool. vi, 1836, 23, pi. 21, f. 4 (teeth); Voy. 
Favorite, v, 1839, 23, pi. 8, f. 4 (same). 
