LEPUS, 433 
449. gaillardi (Lepus), Mearns, Proc. U. S. Nat. Mus., 1896, p. 560. 
Elliot, Syn. N. Am. Mamm., 1901, p. 289. 
GAILLARD’s JACK RABBIT. 
Type locality. Plagas Valley, near its west fork, near Monument 
No. 63, Mexican boundary line, Grant County, New Mexico. 
Geogr. Distr. State of Sonora, Mexico, into plain east of the San 
Luis Mountains, at the head of the Rio Yaqui, and east of that river’s 
watershed. Extent of range unknown. 
Genl. Char. Similar to L. callotis, but more yellowish; ears 
smaller; no black patch on nape. Skull: nasals long and very wide; 
supraorbital processes elevated, massive. 
Color. Head cream buff and black; whitish area about eye; 
nape ochraceous buff; back pale ochraceous cinnamon, mixed with 
black; rump and thighs white with a few black hairs; sides and under 
parts white; limbs white, washed with buff on outer side; gular patch 
buff; sides of neck and front of shoulders ochraceous; ears yellowish 
brown, mixed with black anteriorly, white posteriorly, tips white, 
fringe on anterior edge ochraceous buff, of tips and posterior edge 
white; tail above black with many white-tipped hairs, beneath white. 
But little difference between summer and winter pelages. 
Measurements. Total length, 530; tail vertebre, 77; ear from 
crown, 146; hind foot, 131. 
a.—battyi (Lepus), Allen, Bull. Am. Mus. Nat. Hist., 1903, p. 607. 
Batty’s JACKASS RABBIT. 
Type locality. Rancho Santuario, State of Durango, Mexico. 
Genl. Char. ‘Similar to L. galliardi, but much smaller, the gen- 
eral coloration yellower and less rufescent, especially the under fur; 
prepectoral collar much paler, nearly white, or pale brownish white 
instead of buff; front of fore feet grayish white instead of buffy white, 
and upper surface of hind feet clearer or purer white; extreme ter- 
minal portion (about 25 mm.) of anterior border of ear blackish in 
both forms.”’ 
Measurements. ‘Type, total length, 511; head and body, 451; 
tail vertebre, 60; hind foot without claws, 122; ear from notch, 127; 
from crown, 140. Skull: total length, 92; basal length, 82; zygo- 
matic breadth, 41; greatest breadth across supraorbital processes, 31; 
postorbital constriction, 11; length of nasals, 40; anterior width of 
nasals, 11; posterior width of nasals, 20; palatal length, 9; length of 
premolar-molar series (alveolar border), 17.’’ (Allen, 1. c.) 
450. alleni (Lepus), Mearns, Bull. Am. Mus. Nat. Hist., 1890, p. 
294. Elliot, Syn. N. Am. Mamm., gor, p. 288. 
