~Spermophilus variegatus grammurus~ (Say)
A. H. Howell (N. Amer. Fauna, 56:147, May 18, 1938) accorded _Citellus_ [= _Spermophilus_] _variegatus utah_ Merriam a geographic range that included the Kaibab Plateau of Arizona. Durrant (Univ. Kansas Publ. Mus. Nat. Hist., 6:119, August 10, 1952) assigned to _S. v. grammurus_ a geographic range that included southern Utah from the eastern to the western border but in doing this did not mention the rock squirrel of the Kaibab Plateau of Arizona that also might be expected to be referable to _S. v. grammurus_. Howell (_loc. cit._) had two specimens from the Kaibab Plateau. Of these we have examined the one from Big Spring (161566 BS) and find that it lacks the darker (more tawny) head and posterior back of _C. v. utah_ and agrees with _C. v. grammurus_. On this basis we refer the rock squirrel of the Kaibab Plateau to the subspecies _Spermophilus variegatus grammurus_ (Say).
This subspecies was named from the Olympic Peninsula of Washington. A. H. Howell, in his "Revision of the American chipmunks" (N. Amer. Fauna, 52:77, and fig. 5, 1929) regarded the geographic range of _Eutamias_ [= _Tamias_] _amoenus caurinus_ as the mountains of the Olympic Peninsula and most of Mt. Rainier. The geographic range of the _amoenus_ chipmunk on Mt. Rainier almost certainly is continuous with that of _T. a. ludibundus_ in the Cascade Mountains of which Mt. Rainier is a westward-projecting arm. There is no contact between the chipmunks of Mt. Rainier and those of the Olympic Peninsula; those on the Peninsula are geographically isolated from all others of the species and are separated from those on Mt. Rainier by approximately eighty miles of low-lying country, which is uninhabited by chipmunks of the species _Tamias amoenus_. Therefore, Howell's (_loc. cit._) assignment of most of the chipmunks on Mt. Rainier to _caurinus_ is open to question and Dalquest, in the "Mammals of Washington" (Univ. Kansas Publ. Mus. Nat. Hist., vol. 2, 1948) evidently thought that Howell had incorrectly identified them. On page 256 Dalquest (_op. cit._) defined the geographic range of _T. a. caurinus_ as restricted to the Olympic Peninsula and showed (fig. 81) Mt. Rainier to be in the geographic range of _T. a. ludibundus_. We would accept Dalquest's (_op. cit._) arrangement without question and also would follow it because it is the more recent one were it not for the fact that Dalquest gives no reason for his changes. To allow us to decide the matter we have compared the pertinent materials ourselves. Catalogue numbers below are of the United States National Museum, Biological Surveys Collection, and each specimen mentioned by catalogue number is an adult female which shows much wear on the fourth upper premolar.