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 México. =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): Río 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 white except for mid-dorsal line of black extending onto rump; sides of shoulders, flanks, sides of abdomen, rump, and outside of hind legs uniform iron gray. The average weight of 61 adult males from Arizona was 8.2 lbs. In that state 124 pregnant females had an average of 1.93 young (1-5) and Vorhies and Taylor (1933:580) thought that a female had three or four litters per year. LEPUS ALLENI ALLENI Mearns. 1890. _Lepus alleni_ Mearns, Bull. Amer. Mus. Nat. Hist., 2:294, February 21, type from Rillito, on the Southern Pacific Railroad, Pima County, Arizona. _Marginal records._--Arizona: Queen Creek (Vorhies and Taylor, 1933:480); Cascabel (_ibid._); Calabasas (Nelson, 1909:118). Sonora (Burt, 1938): Cerro Blanco (p. 67); Oputo (p. 66); Batamotal (p. 66); La Libertad Ranch (p. 67); Picu Pass (p. 67). Arizona: 2 mi. W Quitovaquita (Huey, 1942:362); Casa Grande (Nelson, 1909:118). LEPUS ALLENI PALITANS Bangs. 1900. _Lepus_ (_Macrotolagus_) _alleni palitans_ Bangs, Proc. New England Zool. Club, 1:85, February 23, type from Aguacaliente, about 40 mi. SE Mazatlan, Sinaloa.