284 NEOTOMA. 
Topos Santos IsLanp Woop Rat. 
Type locality. Todos Santos Island, Lower California, Mexico. 
Geogr. Distr. Known from type locality only. 
Genl. Char. Nasals rounded anteriorly; slight supraorbital bead; 
first upper molar with sulcus on anterior internal border. Size small. 
Color. Upper parts grayish brown, slightly mixed with black, 
and tinged with fulvous; forearm above externally and outer side 
of leg blackish; under parts, hands, and feet white to roots of hairs; 
tail above blackish brown, beneath grayish white. 
Measurements. Total length, 330-345; tail vertebra, 132-146; 
hind foot, 34-36; ear, 23-25. Skull: total length, 46; basal length, 
42; zygomatic width, 25; mastoid width, 18.2; interorbital constric- 
tion, 4.8; length of nasals, 18; palatal length, 18; length of upper 
molar series, 8. 
289. intermedia (Neotoma), Rhoads, Am. Nat., xxvitl, 1894, p. 69. 
Elliot, Syn. N. Am. Mamm., 1901, p. 161. 
californica Price, Proc. Calif. Acad. Scien., 1894, p. 154, pl. xI. 
venusta True, Proc. U.S. Nat. Mus. 1894, p. 247, Sept. 
Ruoaps’ Woop Rat. 
Type locality. Dulzuras, San Diego County, California. 
Geogr. Distr. Lower California, Mexico, and southern California, 
south of the Bay of Monterey. 
Genl. Char. Size small; tail slender, short, bicolor; ears large; 
soles naked. 
Color. Above light brownish gray, lined with black; chin, center 
of breast, inside of legs, and feet, white; rest of under parts soiled 
grayish buff; tail above sooty blackish, beneath white. 
Measurements. Total length, 318; tail vertebre, 160; hind foot, 
35; ear, 28. Skull: occipito-nasal length, 42; Hensel, 33; zygomatic 
width, 20; interorbital constriction, 5.5; length of nasals, 16; palatal 
length, 18; length of upper molar series, 8.5; length of mandible, rg. 
a.—melanura (Neotoma), Merr., Proc. Biol. Soc. Wash., 1x, 1894, 
D. tau. 
BLACK-TAILED Woop Rat. 
Type locality. Ortiz, State of Sonora, Mexico. 
Geogr Distr. State of Sonora, Mexico. 
Genl. Char. Size small; first upper molar has the ‘‘anterior loop 
partly divided by antero-internal sulcus.” 
Color. Winter Pelage. Upper parts mixed black and ochraceous 
buff; sides ochraceous; under parts, hands, and feet white to roots of 
hairs, except on sides of belly, where the bases are plumbeous at 
roots; ankles blackish; tail black above, white beneath. 
