136 TAMIAS. 
98. obscurus (Tamas), Allen, Bull. Am. Mus. Nat. Hist., 1890, 
p. 70: 
LowER CALIFORNIA CHIPMUNK. 
Type locality. San Pedro Martir Mountains, Lower California, 
Mexico. 
Geogr. Distr. San Pedro Martir and Hanson Laguna Mountains, 
Lower California, Mexico. 
Genl. Char. Size small; pelage soft, color dark. 
Color. Post-breeding Pelage. Above dark brownish gray; five 
indistinct dorsal stripes dull chestnut, posterior half of median one 
blackish; intermediate light stripes whitish gray; central portion of 
flanks yellowish brown; shoulders, arms, thighs, and legs like upper 
parts; top of head blackish gray; ears similar, with large white 
patches at base; sides of face whitish, with three chestnut stripes 
from nose to ears; under parts whitish; tail above black or dark 
brown washed with black, beneath rufous edged with black and with 
white hairs intermingled; hands like arms; feet buffy or brownish 
gray. 
Winter Pelage. Dull; light stripes on dorsal region very faint, 
almost obsolete; dark stripes also faintly perceptible; upper parts 
iron gray tinged with brown, with the hight gray stripes, and darker 
brown ones faintly indicated; middle of sides fulvous; top of head 
like back; two white stripes on sides of face, one from tip of nose 
over and beyond eye, the other from beneath eye to base of ear; 
shoulders and sides like back; upper parts of arms and hands, legs 
and feet paler brownish or brownish gray; under parts white, plum- 
beous of under fur showing through; tail above black, beneath in 
center dark rufous, bordered with black and edged with yellowish 
white; anal region very dark rufous. 
Measurements. Total length, 230; tail vertebrze, 80-103; hind 
foot, 32-34. Skull: occipito-nasal length, 37; Hensel, 16; zygomatic 
width, 20; interorbital width, 8; palatal length, 15.5; length of upper 
molar series, 5.5. 
99. bulleri (Tamias), Allen, Bull. Amer. Mus. Nat. Hist., 1889, 
Del yse 
MEXICAN CHIPMUNK. 
Type locality. Sierra de Valparaiso, State of Zacatecas, Mexico. 
Geogr. Distr. State of Zacatecas, Mexico. 
Genl. Char. Similar to T. merriam1. Ears tricolor; black patch 
between eye and ear. 
Color. Upper parts and sides pale gray tinged with buff; five 
dark dorsal stripes, three distinct, the three median ones seal brown 
