_T. b. birdseyei_, 3; topotypes Av. 220 71 29 31.6 11.8 22.7 18.6 6.1 7.4 2.4 14.7 7.5 Min. 217 68 28 31.4 11.0 22.4 18.3 6.0 7.3 1.6 13.3 7.4 Max. 223 75 30 32.0 12.8 23.0 19.1 6.2 7.4 3.0 15.3 7.5 _T. b. virgineus_, 4; Beaverdam Wash, 5 mi. N Utah-Arizona Line Av. 211 64 29 31.6 12.2 22.6 19.4 5.9 7.5 3.1 15.1 7.3 Min. 202 60 27 31.3 11.3 22.4 18.8 5.8 7.3 2.4 14.4 7.2 Max. 218 68 30 32.1 12.8 22.7 20.0 6.1 7.8 3.7 15.5 7.6 _T. b. aureus_, 3; topotypes Av. 226 57 31 33.2 13.3 23.8 19.8 6.7 8.2 1.9 15.3 8.2 Min. 217 54 30 32.8 12.5 23.3 19.6 6.4 8.0 1.6 14.5 8.2 Max. 233 64 31 34.0 14.2 24.4 19.8 6.9 8.4 2.0 16.4 8.3 No. 20300 (C. M.) _T. b. howelli_, 1; 10 mi. N Moab 202 59 28 32.4 12.3 21.1 19.2 6.4 7.9 2.4 15.8 8.3 ---------------------------------------------------------------------- MEASUREMENTS OF ADULT FEMALES OF THOMOMYS--_Concluded_ ====================================================================== Total length | Length of tail | | Length of hind foot | | | Basilar length | | | | Length of nasals | | | | | Zygomatic breadth | | | | | | Mastoid breadth | | | | | | | Interorbital breadth | | | | | | | | Alveolar length of | | | | | | | | upper molar series | | | | | | | | | Extension of premax | | | | | | | | | post. to nasals | | | | | | | | | | Length of | | | | | | | | | | rostrum | | | | | | | | | | | Breadth | | | | | | | | | | | of rostrum ---------------------------------------------------------------------- No. 158524 (U. S. N. M.) _T. b. dissimilis_, 1; topotype 188 61 27 28.2 10.1 19.0 16.7 6.1 7.4 2.1 12.8 6.5 No. 158528 (U. S. N. M.) _T. b. osgoodi_, 1; topotype 203 61 27 29.6 11.5 .. 18.3 6.9 7.4 2.0 14.0 7.3 _T. b. alexandrae_, 3; topotypes Av. 205 63 28 30.9 11.8 20.8 17.9 6.4 7.6 1.8 14.1 7.5 Min. 195 57 27 28.7 11.5 20.5 17.2 6.3 7.5 1.5 13.6 7.2 Max. 215 70 29 31.5 12.1 22.2 18.6 6.5 7.7 2.0 14.7 7.7 -------------------------------------------------------------------------- LITERATURE CITED ALLEN, J. A. 1874. Notes on the mammals of portions of Kansas, Colorado, Wyoming and Utah, Part IV. On the mammals of the Great Salt Lake Valley, Utah. Bull. Essex Inst., 6:61-66, 1874.