Carbon Co.: Lake Marie, 10,440 ft., 1; 2 mi. S and 1/2 mi. W Medicine Bow Peak, 10,400 ft., 1; 2 mi. S and 2 mi. W Medicine Bow Peak, 10,700 ft., 1; 10 mi. N and 14 mi. E Encampment, 8,000 ft., 2; 8 mi. N and 14 mi. E Encampment, 8,400 ft., 2; 8 mi. N and 16 mi. E Encampment, 8,400 ft., 3; 21½ mi. E and 8 mi. N Encampment, 9,400 ft., 2; 10 mi. E and 6 mi. S Saratoga, 8,800 ft., 1; 8 mi. N and 19½ mi. E Savery, 8,800 ft., 16; 17 mi. E and 7 mi. N Savery, 8,300 ft., 1; 7 mi. N and 19 mi. E Savery, 10,128 ft., 1; 14 mi. E and 6 mi. N Savery, 8,400 ft., 1; 5 mi. N and 5 mi. E Savery, 6,900 ft., 2.
Albany Co.: 27 mi. N and 7½ mi. E Laramie, 6,960 ft., 12; 13 mi. E and 9 mi. N Laramie, 7,700 ft., 2; 8¾ mi. E and 6½ mi. S Laramie, 8,200 ft., 1; 5½ mi. ESE Laramie, 8,500 ft., 1; 8 mi. E and 4 mi. S Laramie, 8,600 ft, 1; 2 mi. SE Pole Mountain, 8,200 ft., 19; 3 mi. S Pole Mountain, 8,100 ft., 2; 1 mi. SSE Pole Mountain, 8,350 ft., 3; 3 mi. ESE Browns Peak, 10,000 ft., 15; 2½ mi. ESE Browns Peak, 10,300 ft., 1.
Laramie Co.: 5 mi. W Horse Creek P.O., 7,200 ft., 2; 3½ mi. W Horse Creek P.O., 7,000 ft., 3; 2 mi. W Horse Creek P.O., 6,600 ft., 1.
Additional records (Howell 1929:51): Natrona Co.: Casper Mountains, 7 mi. S Casper. Carbon Co.: Bridger Peak; Riverside. Albany Co.: Springhill, 12 mi. N Laramie Peak; Eagle Peak; Bear Creek, 3 mi. SW Eagle Peak; Laramie Mountains, 10 mi. E Laramie; Woods [= Woods Landing]; Sherman. Laramie Co.: Bluffs near Pole Creek; 6 mi. W Islay.
Table 1
Average and Extreme Measurements in Millimeters of Adult Chipmunks that Occur in Wyoming
| Greatest length of skull | Zygomatic breadth | Cranial breadth | Length of nasals | Total length | Length of tail | Length of lower tooth-row | Condylo-alveolar length of mandible | ||
| E. m. minimus, S of Bitter Creek, Sweetwater Co. | |||||||||
| Mean(5) | 29.9 | 16.7 | 14.8 | 9.0 | 188 | 84.6 | 4.65 | 5.51 | |
| Min.♂ | 29.0 | 16.5 | 14.6 | 8.6 | 177 | 81.0 | 4.52 | 15.11 | |
| Max. | 30.9 | 17.2 | 15.0 | 9.8 | 197 | 89.0 | 4.80 | 16.21 | |
| Mean(6) | 30.1 | 17.2 | 15.1 | 8.6 | 193 | 85.3 | 4.69 | 16.08 | |
| Min.♀ | 29.0 | 16.8 | 14.9 | 7.9 | 184 | 80.0 | 4.53 | 15.71 | |
| Max. | 30.8 | 17.7 | 15.5 | 9.4 | 200 | 93.0 | 4.91 | 16.58 | |
| E. m. consobrinus, near Jackson, Teton Co. | |||||||||
| Mean(4) | 30.1 | 16.6 | 14.4 | 8.6 | 190 | 83.0 | 4.48 | 15.65 | |
| Min.♀ | 29.6 | 16.4 | 14.3 | 8.5 | 190 | 80.0 | 4.43 | 15.28 | |
| Max. | 30.7 | 16.9 | 14.6 | 8.8 | 192 | 86.0 | 4.59 | 15.99 | |
| Mean(6) | 30.8 | 17.1 | 14.5 | 9.1 | 200 | 88.4 | 4.60 | 16.05 | |
| Min.♀ | 30.2 | 16.9 | 14.1 | 8.7 | 195 | 85.0 | 4.43 | 15.60 | |
| Max. | 31.3 | 17.5 | 15.1 | 9.5 | 205 | 92.0 | 4.84 | 16.70 | |
| E. m. pallidus, Moorcroft and Rockypoint, Weston Co. | |||||||||
| Mean(9) | 31.8 | 18.0 | 15.3 | 9.3 | 193 | 85.8 | 4.84 | 16.74 | |
| Min.♂ | 31.4 | 17.7 | 14.9 | 8.5 | 185 | 80.0 | 4.34 | 16.23 | |
| Max. | 32.5 | 18.7 | 15.9 | 9.7 | 204 | 91.0 | 5.02 | 17.21 | |
| Mean(7) | 32.2 | 18.2 | 15.5 | 9.6 | 205 | 91.0 | 4.97 | 17.02 | |
| Min.♀ | 31.4 | 17.8 | 15.1 | 9.1 | 203 | 86.0 | 4.70 | 16.30 | |
| Max. | 32.9 | 18.9 | 16.0 | 10.3 | 214 | 99.0 | 5.18 | 17.39 | |
| E. m. confinis, Bighorn Mts., near Tensleep, Washakie Co. | |||||||||
| Mean(9) | 31.6 | 17.8 | 15.4 | 9.3 | 205 | 89.6 | 4.78 | 16.71 | |
| Min.♂ | 30.4 | 17.2 | 14.9 | 8.9 | 194 | 79.0 | 4.51 | 16.18 | |
| Max. | 33.3 | 19.0 | 16.2 | 9.9 | 228 | 113.0 | 5.09 | 17.70 | |
| Mean(8) | 32.4 | 18.7 | 15.6 | 9.6 | 208 | 88.8 | 4.83 | 17.09 | |
| Min.♀ | 31.7 | 17.9 | 15.3 | 9.2 | 189 | 76.0 | 4.69 | 16.49 | |
| Max. | 33.1 | 19.3 | 16.1 | 9.7 | 226 | 103.0 | 4.93 | 17.73 | |
| E. m. silvaticus, 16 mi. N Custer, Pennington Co., S.D. | |||||||||
| Mean(19) | 32.3 | 18.2 | 15.5 | 9.6 | 200 | 86.2 | 4.85 | 16.78 | |
| Min.♂ | 31.5 | 17.4 | 15.0 | 9.1 | 189 | 76.0 | 4.63 | 16.19 | |
| Max. | 33.4 | 19.4 | 16.1 | 10.2 | 210 | 94.0 | 5.13 | 17.74 | |
| Mean(15) | 32.6 | 18.1 | 15.7 | 9.5 | 208 | 90.2 | 4.96 | 16.90 | |
| Min.♀ | 31.5 | 17.7 | 15.0 | 9.1 | 189 | 70.0 | 4.61 | 16.26 | |
| Max. | 33.7 | 19.2 | 16.2 | 10.5 | 220 | 105.0 | 5.29 | 18.28 | |
| E. m. operarius, near Pole Mt., Albany Co. | |||||||||
| Mean(9) | 31.5 | 17.6 | 15.2 | 9.7 | 193 | 85.6 | 4.78 | 16.52 | |
| Min.♂ | 30.3 | 17.0 | 14.9 | 8.9 | 183 | 77.0 | 4.58 | 15.63 | |
| Max. | 32.4 | 18.2 | 15.5 | 10.6 | 203 | 91.0 | 5.12 | 17.37 | |
| Mean(8) | 32.2 | 18.0 | 15.4 | 9.7 | 203 | 85.7 | 4.86 | 16.50 | |
| Min.♀ | 31.1 | 17.6 | 15.0 | 9.2 | 194 | 79.0 | 4.64 | 15.44 | |
| Max. | 33.4 | 18.5 | 15.8 | 10.2 | 212 | 92.0 | 5.11 | 17.21 | |
| E. a. luteiventris, near Moran, Teton Co. | |||||||||
| Mean(20) | 33.6 | 18.2 | 15.5 | 10.6 | 212 | 94.8 | 5.14 | 17.27 | |
| Min.♂ | 32.2 | 17.4 | 14.9 | 9.8 | 198 | 87.0 | 4.86 | 16.42 | |
| Max. | 35.2 | 18.7 | 16.2 | 12.1 | 221 | 108.0 | 5.37 | 18.39 | |
| Mean(10) | 33.8 | 18.5 | 15.5 | 11.1 | 217 | 91.7 | 5.13 | 17.47 | |
| Min.♀ | 33.4 | 18.1 | 15.1 | 10.5 | 203 | 81.0 | 5.06 | 16.89 | |
| Max. | 34.7 | 19.0 | 16.0 | 11.5 | 225 | 100.0 | 5.32 | 18.33 | |
| E. d. utahensis, W side Green River, 1 mi. N Utah border. | |||||||||
| Mean(4) | 34.7 | 18.9 | 16.4 | 10.8 | 197 | 84.5 | 5.08 | 17.91 | |
| Min.♂ | 34.7 | 18.7 | 16.4 | 0.5 | 191 | 81.0 | 5.00 | 17.77 | |
| Max. | 34.8 | 19.2 | 16.4 | 11.1 | 203 | 88.0 | 5.15 | 18.06 | |
| Mean(2) | 36.0 | 19.5 | 16.3 | 11.3 | 211 | 88.0 | 5.25 | 18.87 | |
| Min.♀ | 35.5 | 19.4 | 16.2 | 11.3 | 210 | 86.0 | 5.22 | 18.73 | |
| Max. | 36.6 | 19.7 | 16.4 | 11.4 | 212 | 90.0 | 5.28 | 19.02 | |
| E. u. umbrinus, Mts. S Robertson, Uinta Co. | |||||||||
| Mean(11) | 34.7 | 18.9 | 15.7 | 10.9 | 218 | 96.2 | 5.13 | 18.04 | |
| Min.♂ | 34.3 | 18.3 | 15.6 | 10.3 | 215 | 81.0 | 4.79 | 17.57 | |
| Max. | 35.2 | 19.4 | 16.0 | 11.7 | 228 | 112.0 | 5.42 | 18.59 | |
| Mean(4) | 35.1 | 19.2 | 15.9 | 11.0 | 224 | 96.4 | 5.17 | 18.46 | |
| Min.♀ | 34.9 | 19.2 | 15.7 | 10.3 | 204 | 90.0 | 5.11 | 18.31 | |
| Max. | 35.4 | 20.0 | 16.2 | 11.8 | 234 | 100.0 | 5.22 | 18.98 | |
| E. u. fremonti, Togwotee Pass, Fremont Co. | |||||||||
| Mean(8) | 35.6 | 19.3 | 15.9 | 11.4 | 223 | 99.0 | 5.34 | 19.17 | |
| Min.♂ | 35.2 | 18.9 | 15.8 | 11.1 | 216 | 95.0 | 5.22 | 18.72 | |
| Max. | 36.5 | 19.7 | 16.1 | 11.8 | 243 | 111.0 | 5.57 | 19.78 | |
| Mean(6) | 35.3 | 19.6 | 15.9 | 11.3 | 229 | 101.0 | 5.40 | 19.02 | |
| Min.♀ | 34.5 | 19.3 | 15.7 | 10.9 | 223 | 92.0 | 5.35 | 18.37 | |
| Max. | 36.0 | 20.0 | 16.5 | 12.0 | 239 | 110.0 | 5.44 | 19.51 | |
| E. u. montanus, near Longs Peak, Boulder Co., Colorado. | |||||||||
| Mean(5) | 35.2 | 18.8 | 15.5 | 10.8 | 226 | 96.0 | 5.20 | 18.29 | |
| Min.♂ | 34.7 | 18.4 | 15.2 | 10.1 | 215 | 93.0 | 5.03 | 17.80 | |
| Max. | 36.8 | 19.4 | 16.2 | 11.5 | 232 | 115.0 | 5.53 | 19.36 | |
| Mean(6) | 35.7 | 19.1 | 15.6 | 10.9 | 226 | 98.0 | 5.28 | 18.67 | |
| Min.♀ | 35.1 | 18.8 | 15.1 | 10.3 | 215 | 89.0 | 5.06 | 18.09 | |
| Max. | 36.5 | 19.5 | 16.0 | 11.5 | 231 | 105.0 | 5.58 | 19.35 | |
[ Eutamias amoenus (J. A. Allen) ]
Diagnosis.—Size medium; over-all tone of upper parts often grayish olive; baculum small or medium, slender; tip of baculum 30 to 38 per cent of length of shaft; skull medium, narrow across zygomata.
Comparisons.—From E. dorsalis utahensis, the only subspecies of this species in Wyoming, E. amoenus luteiventris differs in: Dorsal light and dark stripes distinct; over-all tone of upper parts less grayish (more tawny); tip of baculum less than 38 per cent of length of shaft in adult specimens.