al Surveys
Collection) as follow: Nos. 214118, 214670 (topotypes from Camp Verde,
Arizona), 212707 (Chiricahua Ranch, 20 mi. E Calva), 208635 (H-bar
Ranch, 20 mi. S Payson), and 215762 (Turkey Creek). Therefore, the name
_Thomomys bottae pinalensis_ is here arranged as a synonym of the
earlier name, _Thomomys bottae mutabilis_ Goldman (Proc. Biol. Soc.
Washington, 46:75, April 27, 1933), the type locality of which is Camp
Verde, Yavapai County, Arizona.

~Thomomys bottae patulus~ Goldman

When Goldman (Jour. Washington Acad. Sci., 26:113, March 15, 1936) named
the subspecies _Thomomys bottae desitus_, he assigned to it (_op.
cit._:114) 10 specimens obtained at Wickenburg, Maricopa County,
Arizona. He did not mention specimens from Wickenburg when he
subsequently named the subspecies _Thomomys bottae patulus_ (Jour.
Washington Acad. Sci., 28:341, July 15, 1938) and stated that _T. b.
patulus_ was known only from the type locality in the "bottomland along
[the] Hassayampa River, two miles below Wickenburg." Examination in 1950
of specimens referable to _T. b. patulus_ in the U. S. Biological
Surveys Collection shows all of them, including the holotype, to be
labeled "Wickenburg." The 10 specimens from Wickenburg reported by
Goldman in 1936 as _T. b. desitus_ were included by him among the 16
(actually 17, one being a skull only) upon which he based his
description of _T. b. patulus_ in 1938. Examination of the field
catalogues of 3 of the 4 collectors who obtained the specimens discloses
that only the 7 specimens obtained last were recorded as occurring in
the Hassayampa River bottoms; the first 10 were recorded only as from
"Wickenburg." Briefly, only one subspecies, _T. b. patulus_, is present
in the area, and Goldman in 1938 seems to have thought that the two
localities were actually the same, and that "2 miles below Wickenburg"
was the more precise designation.

~Thomomys bottae providentialis~ Grinnell

We have examined a specimen, No. 26120/33526, from 12-Mile Spring,
California, in the U. S. Biological Surveys Collection, which Bailey (N.
Amer. Fauna, 39:73, November 15, 1945) referred to the subspecies
_Thomomys perpallidus_ [= _aureus_] _perpes_. We find the specimen to be
referable to the later named _Thomomys bottae providentialis_ on the
basis of smaller ear, more massive, more ridged and angular skull,
greater interorbital breadth, deeper and thicker rostrum, less globular
bullae, and U-shaped rather