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)29.916.714.89.018884.64.655.51
Min.♂29.016.514.68.617781.04.5215.11
Max.30.917.215.09.819789.04.8016.21
Mean(6)30.117.215.18.619385.34.6916.08
Min.♀29.016.814.97.918480.04.5315.71
Max.30.817.715.59.420093.04.9116.58
E. m. consobrinus, near Jackson, Teton Co.
Mean(4)30.116.614.48.619083.04.4815.65
Min.♀29.616.414.38.519080.04.4315.28
Max.30.716.914.68.819286.04.5915.99
Mean(6)30.817.114.59.120088.44.6016.05
Min.♀30.216.914.18.719585.04.4315.60
Max.31.317.515.19.520592.04.8416.70
E. m. pallidus, Moorcroft and Rockypoint, Weston Co.
Mean(9)31.818.015.39.319385.84.8416.74
Min.♂31.417.714.98.518580.04.3416.23
Max.32.518.715.99.720491.05.0217.21
Mean(7)32.218.215.59.620591.04.9717.02
Min.♀31.417.815.19.120386.04.7016.30
Max.32.918.916.010.321499.05.1817.39
E. m. confinis, Bighorn Mts., near Tensleep, Washakie Co.
Mean(9)31.617.815.49.320589.64.7816.71
Min.♂30.417.214.98.919479.04.5116.18
Max.33.319.016.29.9228113.05.0917.70
Mean(8)32.418.715.69.620888.84.8317.09
Min.♀31.717.915.39.218976.04.6916.49
Max.33.119.316.19.7226103.04.9317.73
E. m. silvaticus, 16 mi. N Custer, Pennington Co., S.D.
Mean(19)32.318.215.59.620086.24.8516.78
Min.♂31.517.415.09.118976.04.6316.19
Max.33.419.416.110.221094.05.1317.74
Mean(15)32.618.115.79.520890.24.9616.90
Min.♀31.517.715.09.118970.04.6116.26
Max.33.719.216.210.5220105.05.2918.28
E. m. operarius, near Pole Mt., Albany Co.
Mean(9)31.517.615.29.719385.64.7816.52
Min.♂30.317.014.98.918377.04.5815.63
Max.32.418.215.510.620391.05.1217.37
Mean(8)32.218.015.49.720385.74.8616.50
Min.♀31.117.615.09.219479.04.6415.44
Max.33.418.515.810.221292.05.1117.21
E. a. luteiventris, near Moran, Teton Co.
Mean(20)33.618.215.510.621294.85.1417.27
Min.♂32.217.414.99.819887.04.8616.42
Max.35.218.716.212.1221108.05.3718.39
Mean(10)33.818.515.511.121791.75.1317.47
Min.♀33.418.115.110.520381.05.0616.89
Max.34.719.016.011.5225100.05.3218.33
E. d. utahensis, W side Green River, 1 mi. N Utah border.
Mean(4)34.718.916.410.819784.55.0817.91
Min.♂34.718.716.40.519181.05.0017.77
Max.34.819.216.411.120388.05.1518.06
Mean(2)36.019.516.311.321188.05.2518.87
Min.♀35.519.416.211.321086.05.2218.73
Max.36.619.716.411.421290.05.2819.02
E. u. umbrinus, Mts. S Robertson, Uinta Co.
Mean(11)34.718.915.710.921896.25.1318.04
Min.♂34.318.315.610.321581.04.7917.57
Max.35.219.416.011.7228112.05.4218.59
Mean(4)35.119.215.911.022496.45.1718.46
Min.♀34.919.215.710.320490.05.1118.31
Max.35.420.016.211.8234100.05.2218.98
E. u. fremonti, Togwotee Pass, Fremont Co.
Mean(8)35.619.315.911.422399.05.3419.17
Min.♂35.218.915.811.121695.05.2218.72
Max.36.519.716.111.8243111.05.5719.78
Mean(6)35.319.615.911.3229101.05.4019.02
Min.♀34.519.315.710.922392.05.3518.37
Max.36.020.016.512.0239110.05.4419.51
E. u. montanus, near Longs Peak, Boulder Co., Colorado.
Mean(5)35.218.815.510.822696.05.2018.29
Min.♂34.718.415.210.121593.05.0317.80
Max.36.819.416.211.5232115.05.5319.36
Mean(6)35.719.115.610.922698.05.2818.67
Min.♀35.118.815.110.321589.05.0618.09
Max.36.519.516.011.5231105.05.5819.35

[ 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.