verage | 21[1]|151.1|39.4 |19.2 |25.00| 6.44|14.99|11.74|8.94
2 x 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 [M] | 27 |161 |41.7 |18.9 |25.1 | 6.16|15.2 |11.9 |8.7
Encampment [F] | 11 |159 |41.1 |19.4 |24.9 | 6.18|14.9 |11.6 |8.6
Savery [M] | 23 |159 |41.0 |19.2 |25.3 | 6.32|15.2 |12.2 |8.8
Savery [F] | 25 |155 |37.1 |18.8 |24.7 | 6.33|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
------------------+------+-----+-----+-----+-----+-----+-----+-----+-----

[Footnote 1: For external parts, 34 individuals were used.]

[Footnote 2: For external parts, 29 individuals were used.]

Some measurements not given above are included in Table 1, together with
the number of specimens and the sex if restricted to one sex. So that
the variability can be evaluated more adequately, the coefficient of
variability and 2 times the standard error of the mean are included for
the measurements in two series. The series consist of all the adult
specimens (with a condylobasilar length of 24.0 mm. or more) of both
sexes from the areas specified. Various barriers are shown in Fig. 2 for
comparison with the distributions of the subspecies and the localities
of known occurrence shown in Fig. 1. _Microtus montanus_ has not been
taken in the Black Hi