MAMMALS OF MINNESOTA. Zot 
. Lepus artemisia BACHMAN, Journ. Acad. N.S. Phila., viii, 1839, 94; 
Townsend’s Narrative, 1839, 329. 
WATERHOUSE, N. H. Mam., ii, 1848, 126. 
AvD. and BACH., Quad. N. A., 1851, ii, 272. 
WoopDHOUSE, Sitgreave’s Col. and Zuni R. Exp., 1853. 
BAIRD, Mam. N. A., 1857, 602; U. S. and Mex. Bound. 
Surv., ii, 1859, ii, 48. 
NEWBERRY, Pacif. R. R. Rep., vi, iv, 1857, 65. 
KENNERLY, ibid., x, vi, 1859, 16. 
SUCKLEY and GIBBS, ibid, 132. 
HAYDEN, Trans. Am. Phil. Soc. Phila., xii, 1863, 148. 
CovEs, Am. Nat., i, 1867, 534; Proc. Acad. Nat. Sci. Phila., 
1867, 136. 
Sylvilagus artemisia GRAY, Ann. and Mag. N. H. 3dseries, xx, 1867, 222. 
Lepus artemisiacus WAGNER, Suppl. Schreber’s Siiug., iv, 1844. 
VAR. AUDUBONI. 
Lepus auduboni BAIRD, Mam. N. A., 1857, 608. 
NEWBERRY, Pac. R. R. Rep., vi, iv, 1857, 65. 
KENNERLY, ibid. x, vi, 1859, 17. 
GRAY, Ann. and Mag. N. H. 3d series, xx, 1867. 
Lepus sylvaticus var. aububoni ALLEN, Proc. Bost. Soc. N. H., xvii, 1875, 
434; Monog. N. A. Rod., ii, p. 329. 
Geographical variation and distribution. As regards the gen- 
eral subject, the present writer can hope to add nothing to the 
exhaustive elaboration in Allen’s memoir, from which the facts 
respecting the geographical variation outside our own state 
are taken with no further acknowledgement. The habitat of 
L. (Sylvilagus) sylvaticus extends from a line north of the 
isotherm of 45°, but conforming more or less with it, except 
westerly, where the northern limit is restricted, over the 
greater part of the United States and southward to Yucatan. 
The typical LZ. sylvaticus extends from Southern Maine west 
to Dakota, south through Nebraska, Kansas, Indian Territory 
and Eastern Texas to Yucatan. The entire United States east 
of this line save the hights of the Alleghanies are occupied by 
this tolerably permament variety. The geographical variation 
over this region consists in ‘‘an increasing paleness from the 
Mississippi westward toward the plains, where the variety 
sylvaticus passes by insensible steps into variety nuttalli. The 
specimens from Eastern Nebraska and Eastern Dakota can, in 
general, hardly be referable to the one form rather than 
the other. At the southward the colors become slightly more 
intense, but the difference is by no means striking. * * * The 
brownish terminal band of the under fur becomes more uni- 
