Intergradation has been noted in specimens from the eastern and southeastern shores of Great Salt Lake. In color and the width of the auditory bullae these specimens are intermediate between _D. o. utahensis_ and _Dipodomys ordii marshalli_ but in the sum total of characters are referable to the latter. Specimens from 20 miles southwest of Nephi and from U. B. (Yuba) Dam are darker and intermediate in rostral width and breadth of the auditory bullae but are referable to _Dipodomys ordii celeripes_. _Specimens examined._--Total, 91, all from Utah, distributed as follows: _Box Elder County_: Promontory Point, 1 (USNM). _Weber County_: Ogden, 4293 ft., 20 (7 BYU; 7 MVZ; 4 USNM); Little Mountain, 1 (USNM). _Davis County_: Antelope Island, Great Salt Lake, 4250 ft., 5 (USNM). _Tooele County_: Bauer, 4500 ft., 6 (UU); St. John, 4300 ft., 4 (UU); Little Valley, Sheeprock Mountains, 5500 ft., 1 (UU); Clover Creek, Onaqui Mountains, 5500 ft., 1 (UU). _Salt Lake County_: Plain, 4 mi. N Draper, 4500 ft., 1 (UU). _Utah County_: Fairfield, Cedar Valley, 4800 ft., 15 (9 BYU; 6 UU); W Lake Mountains, 9 (BYU); Provo, 4510 ft., 10 (MVZ); Sand Dunes W Curtis Station, 4 (BYU). _Juab County_: Nephi, 2 (1 USNM; 1 MVZ); 4 mi. W Nephi, 1 (RH). _San Pete County_: Spring City, 4 (LACM). _Sevier County_: 1 mi. W Aurora, 5190 ft., 6 (5 UU; 1 USNM). =Dipodomys ordii columbianus= (Merriam) _Perodipus ordi columbianus_ Merriam, Proc. Biol. Soc. Washington, 9:115, June 21, 1894. _Dipodomys phillipii_, Baird, U. S. P. R. R. Expl. and Surveys, Gen. Rept., p. 412, 1857 (part--the part from Ft. Walla Walla, O. T.). _Cricetodipus ordii columbianus_, Trouessart, Catalogus Mammalium, 1:581, 1897. _Perodipus ordii columbianus_, Goldman, Proc. Biol. Soc. Washington, 30:113, May 23, 1917. _Dipodomys ordii columbianus_, Grinnell, Journ. Mamm., 2:96, May 2, 1921. _Type._--Female, adult, no. 24181/31594, U. S. Nat. Mus., Dept. of Agriculture, Coll.; Umatilla, Plains of Columbia, Umatilla County, Oregon; obtained on October 18, 1890, by Clark P. Streator, original no. 386.