Key to column headings:
A: No. of individuals averaged
B: Total length
C: Length of tail
D: Length of hind foot
E: Condylobasilar length
F: Alveolar length of upper molar tooth-row
G: Zygomatic breadth
H: Lambdoidal breadth
I: Prelambdoidal breadth
| Locality | A | B | C | D | E | F | G | H | I |
|---|---|---|---|---|---|---|---|---|---|
| M. m. codiensis, all | |||||||||
| Average | 34 | 165.3 | 44.2 | 19.6 | 25.47 | 6.56 | 15.55 | 12.05 | 8.76 |
| 2 × stand. error | 3.56 | 1.84 | .395 | .308 | .067 | .198 | .144 | .129 | |
| Coeff. variab | 6.0 | 11.6 | 5.6 | 3.5 | 3.0 | 3.65 | 1.20 | 1.47 | |
| M. m. nanus, Eastern Idaho | |||||||||
| Average | 21[1] | 151.1 | 39.4 | 19.2 | 25.00 | 6.44 | 14.99 | 11.74 | 8.94 |
| 2 × stand. error | 3.20 | 2.89 | .293 | .286 | 1.15 | .295 | .210 | .182 | |
| Coeff. variab. | 6.1 | 21.1 | 4.38 | 2.49 | 3.99 | 4.10 | 3.79 | 4.31 | |
| M. m. nanus, Wyoming | |||||||||
| Teton Co. | 35 | 160.5 | 40.7 | 18.6 | 25.16 | 6.51 | 15.17 | 11.86 | 8.77 |
| Fremont Co. | 26 | 157.0 | 41.4 | 19.6 | 25.23 | 6.25 | 15.05 | 11.88 | 8.91 |
| Lincoln Co. | 24 | 159.9 | 41.8 | 18.9 | 25.08 | 6.26 | 15.10 | 11.82 | 8.75 |
| Uinta Co. | 26 | 162.4 | 41.3 | 19.0 | 25.33 | 6.42 | 15.31 | 12.16 | 8.89 |
| Sweetwater Co. | 12 | 159.8 | 43.7 | 20.1 | 24.98 | 6.31 | 15.00 | 11.84 | 9.02 |
| Natrona Co. | 40 | 159.6 | 41.0 | 19.6 | 25.04 | 6.40 | 15.00 | 11.84 | 8.93 |
| Carbon Co. | 108 | 158.7 | 40.0 | 19.1 | 24.96 | 6.27 | 15.05 | 11.83 | 8.72 |
| Encampment ♂ | 27 | 161 | 41.7 | 18.9 | 25.1 | 6.16 | 15.2 | 11.9 | 8.7 |
| Encampment ♀ | 11 | 159 | 41.1 | 19.4 | 24.9 | 6.18 | 14.9 | 11.6 | 8.6 |
| Savery ♂ | 23 | 159 | 41.0 | 19.2 | 25.3 | 6.3 | 15.2 | 12.2 | 8.8 |
| Savery ♀ | 25 | 155 | 37.1 | 18.8 | 24.7 | 6.3 | 14.8 | 11.6 | 8.6 |
| M. m. nanus | |||||||||
| Northern Colo. | 8 | 163.1 | 42.4 | 19.6 | 25.20 | 6.44 | 14.86 | 11.70 | 8.56 |
| M. m. fusus | |||||||||
| Southern Colo. | 17[2] | 159.8 | 42.4 | 19.2 | 24.97 | 6.43 | 14.98 | 11.73 | 8.69 |
[1] For external parts, 34 individuals were used.
[2] For external parts, 29 individuals were used.
REFERENCES CITED
Bailey, V.
1900. Revision of American voles of the genus Microtus. N. Amer. Fauna, 17:1-88, June 6.
1917. A new subspecies of meadow mouse from Wyoming. Proc. Biol. Soc. Washington, 30:29-30, February 21.
Cary, M.
1911. A biological survey of Colorado. N. Amer. Fauna, 33:1-256, August 17.
1917. Life zone investigations in Wyoming. N. Amer. Fauna, 42:1-95, October 3.