335, May 26, 1950, for allocation of _S. insonus_ to subgenus
_Sylvilagus_ instead of to subgenus _Tapeti_).

Total length, 435; tail, 42.5; hind foot, 95; ear from notch (dry), 61.
Color grayish brown above and dingy (not white) below; tail dingy buffy
below and dull rusty brown above. The collectors thought that the
species was restricted to the forested parts of the Sierra Madre del Sur
between 7000 and 10,000 feet altitude in the Mexican state of Guerrero.

[Illustration: FIG. 43. Distribution of _Sylvilagus cunicularius_ and
_Sylvilagus graysoni_.

1. _Sylvilagus cunicularius insolitas_
2. _Sylvilagus cunicularius pacificus_
3. _Sylvilagus cunicularius cunicularius_
4. _Sylvilagus graysoni_ ]

=Sylvilagus cunicularius=

Mexican Cottontail

Total length, 485-515; tail, 54-68; hind foot, 108-111; ear from notch
(dry), 60-63. Pelage coarse; upper parts brownish gray; skull massive;
posterior extensions of supraorbital processes varying from those that
project free to those that have the tips, or tips and a considerable
part of the processes, attached to the braincase.

SYLVILAGUS CUNICULARIUS CUNICULARIUS (Waterhouse).

1848. _Lepus cunicularius_ Waterhouse, Nat. Hist. Mammalia, 2:132,
type from Zacualpan (probably in state of M['e]xico).

1909. _Sylvilagus cunicularius_, Nelson, N. Amer. Fauna, 29:239,
August 31.

1890. _Lepus verae-crucis_ Thomas, Proc. Zool. Soc. London, p. 74,
June, type from Las Vigas, Veracruz.

_Marginal records_ (Nelson, 1909:241).--Hidalgo: Tulancingo.
Veracruz: Las Vigas; Orizaba. Oaxaca: Mt. Zempoaltepec; Suchixtepec.
Guerrero: Chilpancingo. Michoac['a]n (Hall and Villa, 1949:469).
P['a]tzcuaro; Tanc['i]taro.

SYLVILAGUS CUNICULARIUS INSOLITUS (J. A. Allen).

1890. _Lepus insolitus_ J. A. Allen, Bull. Amer. Mus. Nat. Hist.,
3:189, December 10, type from plains of Colima, Jalisco.

1909. _Sylvilagus cunicularius insolitus_, Nelson, N. Amer. Fauna,
29:243, August 31.

_Marginal records_ (Nelson, 1909:244).--Sinaloa: Mazatlan; Rosario;
Esquinapa. Nayarit: Acaponeta. Colima: Colima; Armeria, thence
northward along Pacific Coast.

SYLVILAGUS CUNICULARIUS PACIFICUS (Nelson).

1904. _Lepus veraecrucis pacificus_ Nelson, Proc. Biol. Soc.
Washington, 17:104, May 18, type from Acapulco, Guerrero.

1909. _Sylvilagus cunicularius pacificus_, Lyon and Osgood, Catal.
B