Collectively, or individually, where there are as many as six specimens from a place, the material from Mt. Rainier (Glacier Basin excepted) is intermediate in color between _T. a. ludibundus_ and _T. a. caurinus_ and no more closely resembles one subspecies than the other. As may be seen from the cranial measurements recorded above, specimens from Mt. Rainier, although intermediate between the two subspecies just mentioned, resemble _ludibundus_ in lesser zygomatic breadth and lesser cranial breadth (and, it may be added, in lesser dorsolateral inflation of the braincase), but resemble _caurinus_ in longer skull (occipitonasal length), longer nasals and greater breadth across the rows of upper molariform teeth. In summary: The animals from Mount Rainier, in features of taxonomic import, are almost exactly intermediate between _T. a. caurinus_ and _T. a. ludibundus_. Being influenced by considerations of geographic adjacency, we refer the animals on Mount Rainier to _Tamias amoenus ludibundus_ (Hollister). Dalquest's (_op. cit._: 85) explanation of the probable origin of _Tamias amoenus caurinus_ is pertinent here. He writes: "The chipmunks of the Olympic Mountains [_caurinus_] probably reached their present range from the Cascades. Their probable path of emigration was westward from Mt. Rainier, along the glacial outwash train of Nisqualli Glacier, to the moraine and outwash apron of the Vashon Glacier and thence to the Olympics. So similar are the chipmunks of Mt. Rainier and the Olympic Mountains that Howell (1929) included Mt. Rainier in the range of _caurinus_." ~Tamias townsendii cooperi~ Baird Some uncertainty exists concerning the subspecific identity of the Townsend Chipmunk in southern Washington because Dalquest (Univ. Kansas Publ. Mus. Nat. Hist., 2:262, April 9, 1948) identified as _Tamias townsendii cooperi_ specimens that he examined from Yocolt, a place well within the geographic range of _T. t. townsendii_ as defined by A. H. Howell (N. Amer. Fauna, 52: fig. 7, p. 107, November 30, 1929). Dalquest (_op. cit._) referred other specimens, that he did not examine, from Mt. St. Helens (90654, 231112 and 231114 BS) to _T. t. cooperi_ although Howell (N. Amer. Fauna, 52:109, November 20, 1929) had previously identified them as _E. t. townsendii_. By implication, and on his map, Dalquest (_op. cit._, fig. 83, p. 261) assigned to _T. t. cooperi_ still other specimens, that he had not examined, from: Government Springs, 15 mi. N Carson (230514, 230515, 230559, 230560, and 230563 BS); Stevenson (230513 and 230517 BS); and Skamania (230518 BS). Earlier, Howell (op. cit.) had listed the specimens from the three mentioned localities as _Eutamias townsendii townsendii_.