Marginal records.—Wyoming: 1/4 mi. E Moran, 6700 ft.; 2 mi. E Robertson, 7200 ft. Utah: junction Deep Creek and Carter Creek, 7900 ft.; Paradise Park, 21 mi. W and 15 mi. N Vernal, 10,500 ft.; Ephraim, 8500 ft.; Puffer Lake; Payson Lake, 8300 ft., 12 mi. SE Payson, Mt. Nebo; Butterfield Canyon, approximately 5 mi. above Butterfield Tunnel. Idaho: Strawberry Creek, 20 mi. NE Preston, 6700 ft.; 3 mi. SW Victor.
(Synonymy under subspecies)
Range.—From Pacific Coast of Alaska eastward to Atlantic Coast; from northern limit of tree-growth south into central Colorado and northeastern parts of Oklahoma and Georgia. See [fig. 47].
Fig. 47. Distribution of Zapus hudsonius.
Guide to subspecies
| 1. | Z. h. acadicus | 7. | Z. h. intermedius | |
| 2. | Z. h. alascensis | 8. | Z. h. ladas | |
| 3. | Z. h. americanus | 9. | Z. h. pallidus | |
| 4. | Z. h. campestris | 10. | Z. h. preblei | |
| 5. | Z. h. canadensis | 11. | Z. h. tenellus | |
| 6. | Z. h. hudsonius |
Externals.—Size small to medium (total length 188 mm to 216 mm); tail longer than head and body (112 mm to 134 mm) and bicolored, pale brown to brownish-black above, white to yellowish-white below; hind feet long (28 mm [421] to 31 mm), grayish-white above; back ochraceous to dark brown; sides paler than back with dark hair interspersed; lateral line usually present but sometimes indistinct or entirely absent (when present usually clear Ochraceous-Buff); ventral coloration white, sometimes with suffusion of ochraceous; guard hairs average 115 microns (96u to 140u) in diameter; underhair with pigment pattern in form of hollow, narrow rectangles; cuticular scales of underhair large and fewer than those of the underfur of Z. trinotatus, but underhair of Z. hudsonius otherwise resembles that of Z. trinotatus.