ing to almost ochraceous buff; back
overlaid by a distinct black wash giving a penciled effect; anterior
extension of supraorbital process obsolete or short and closely
appressed to orbital rim; tympanic bullae small, smaller than in any
subspecies of _S. floridanus_ in the United States. _S. transitionalis_
is a forest-inhabiting species--more so than is _S. floridanus_.

=Sylvilagus nuttallii=

Nuttall Cottontail

(See figure 39)

Total length, 350-390; tail, 44-50; hind foot, 88-100; ear from notch
(dry), 55-56; weight in Nevada, [MALE] 678, 3 [FEMALE] 928 (868-1032)
grams. Hind feet densely covered with long hair; ear short; tympanic
bulla of moderate size. In the northern part of its range _S. nuttallii_
occurs principally in the sagebrush areas but it occurs also in the
timbered areas of the Transition Life-zone and almost exclusively in
timbered areas in the southern part of its range. From _S. floridanus_,
_S. nuttallii_ along the eastern margin of its range differs in more
slender rostrum, and larger external auditory meatus. In New Mexico and
Arizona, _S. nuttallii_ differs from _S. floridanus_ in the posteriorly
pointed and un-notched supraoccipital shield and in the posterior
extension of the supraorbital process, the tip of which projects free
from the braincase or merely lies against the braincase instead of being
firmly welded to the side of the skull. From _S. audubonii_, _S.
nuttallii_ differs in shorter ears, smaller tympanic bullae and smaller
hind legs; _S. nuttallii_ usually occurs at higher elevations, or where
the two occur at approximately the same elevation _S. nuttallii_ occurs
in wooded or brushy areas and _S. audubonii_ lives on the plains or in
relatively open country. Eight females contained an average of 6.1 (4-8)
embryos.

SYLVILAGUS NUTTALLII GRANGERI (J. A. Allen).

1895. _Lepus sylvaticus grangeri_ J. A. Allen, Bull. Amer. Mus. Nat.
Hist., 7:264, August 21, type from Hill City, Black Hills,
Pennington County, South Dakota.

1909. _Sylvilagus nuttalli grangeri_, Nelson, N. Amer. Fauna,
29:204, August 31.

1904. _Lepus l[aticinctus]. perplicatus_ Elliott, Field Columb.
Mus., publ. 87, zool. ser., 3:255, January 7, type from Hannopee
[= Hannaupah] Canyon, Panamint Mts., Inyo County, California.

_Marginal records._--Alberta: Steveville (Anderson, 1943:25).
Saskatchewan (_ibid._): Cypress Hills; Johnston Lake; Big Muddy Lake.