per parts dark, slightly pinkish, buff heavily washed with
black; backs of ears mainly white without terminal patch of black;
flanks white; rump iron gray.

[Illustration: FIG. 48. Distribution of the White-sided Jack Rabbits.

Guide to kinds:

1. _Lepus callotis_
2. _Lepus flavigularis_
3. _Lepus gaillardi gaillardi_
4. _Lepus gaillardi battyi_
5. _Lepus alleni alleni_
6. _Lepus alleni palitans_
7. _Lepus alleni tiburonensis_ ]

=Lepus flavigularis= Wagner

Tehuantepec Jack Rabbit

1844. _Lepus callotis_ var [gamma] _flavigularis_ Wagner, Schreber's
S[:a]ugthiere, Suppl., 4:106, type from M['e]xico (probably near
Tehuantepec City, Oaxaca).

1909. _Lepus flavigularis_, Nelson, N. Amer. Fauna, 29:125, August
31.

_Marginal records._--Oaxaca (Nelson, 1909:126): Santa Efigenia; San
Mateo del Mar; Huilotepec.

Total length, 595; tail, 77; hind foot, 133; ear from notch (dry), 112.
Upper parts bright ochraceous buff strongly washed with black; ears
entirely buff; nape with black stripe extending back from base of each
ear and median stripe of buff; flanks and underparts of body white; rump
iron gray; tympanic bullae smaller than in any other _Lepus_ of M['e]xico.

=Lepus gaillardi=

Gaillard Jack Rabbit

Total length, 450-536; tail, 59-80; hind foot, 124-133; ear from notch
(dry), 110-112. Coloration essentially as in _Lepus callotis_ except
that nape is plain buff, without a trace of black, and upper parts
paler, more vinaceous buff.

LEPUS GAILLARDI BATTYI J. A. Allen.

1903. _Lepus_ (_Microtolagus_ [_sic_]) _gaillardi battyi_ J. A.
Allen, Bull. Amer. Mus. Nat. Hist., 19:607, November 12, type from
Rancho Santuario, northwestern Durango.

_Marginal records._--Durango (Nelson, 1909:122): R['i]o Campo; type
locality.

LEPUS GAILLARDI GAILLARDI Mearns.

1896. _Lepus gaillardi_ Mearns, Proc. U. S. Nat. Mus., 18:560, June
24, type from West Fork of Playas Valley, near monument No. 63,
Mexican boundary line, Grant County, New Mexico.

_Marginal records._--New Mexico: Animas Valley (V. Bailey, 1932:53).
Chihuahua (Nelson, 1909:121): Whitewater; Colonia Juarez. New
Mexico; type locality.

=Lepus alleni=

Antelope Jack Rabbit

Total length, 553-670; tail, 48-76; hind foot, 127-150, ear from notch,
in flesh, 138-173. Top and sides of head creamy buff, slightly washed on
top with black; tail whi