Marginal records.—California (Orr, 1940:122): Sespe; Reche Canyon near Colton; San Felipe Canyon. Baja California (Nelson, 1909:220): Nachogüero Valley; Santo Tomas, thence northerly along coast.
Sylvilagus audubonii vallicola Nelson.
1907. Sylvilagus auduboni vallicola Nelson, Proc. Biol. Soc. Washington, 20:82, July 22, type from San Emigdio Ranch, Kern County, California.
Marginal records (Orr, 1940:118, unless otherwise noted).—California: Fresno Flat (Nelson, 1909:218); Badger (ibid.); 2750 ft., Onyx; Tehachapi (Nelson, 1909:218); Mt. Pinos (Orr, 1940:119), northwesterly, seldom actually reaching coast, to central Monterey County thence easterly to point of beginning.
Sylvilagus audubonii warreni Nelson.
1907. Sylvilagus auduboni warreni Nelson, Proc. Biol. Soc. Washington, 20:83, July 22, type from Coventry, Montrose County, Colorado.
Marginal records.—Utah: 5250 ft., Willow Creek (Durrant, MS). Colorado (Nelson, 1909:232): Rifle; Villa Grove; Medano Ranch. New Mexico: Hondo Canyon (Nelson, 1909:232); Cieneguilla (ibid.); Juan Tafoya (Bailey, 1932:59). Arizona (Nelson, 1909:232): Holbrook; Winslow. Utah: Canesville (sic) (Nelson, 1909:232); Wellington (Durrant, MS).
Sylvilagus aquaticus
Swamp Rabbit
Total length, 530-540; tail, 67-71; hind foot, 105-110; length of ear from notch (dry), 63-67. Upper parts blackish brown or reddish brown; underparts with some white; under side of tail white; skull robust; posterior extensions of supraorbital processes joined for their entire length with side of braincase or, in some specimens, with a small foramen between the braincase and the base of the posterior extension of the supraorbital process. This big rabbit is a stronger runner than the smaller marsh rabbit and is easily distinguished from the smaller species by larger size and white, instead of brownish or grayish, underside of the tail.
Sylvilagus aquaticus aquaticus (Bachman).