NEOTOMA. 283 
Genl. Char. Size medium; tail long. Skull: frontals expanded 
posteriorly, forming supraorbital shelves; bullae small; teeth slender, 
with anterior lobe of first upper molar having a deep notch on inner 
side, as in N. mexicana. 
Color. Upper parts and sides of face buffy ochraceous, lined 
with black; head grayish; under parts white, the plumbeous under 
fur showing; axille salmon; tail dusky above, white below; hands 
and feet from wrists and ankles white. 
Measurements. Total length, 350; tail vertebre, 164; hind foot, 
34. Skull: basal length, 37; zygomatic width, 21.5; palatal length, 
21.5; length of upper molar series, alveolar border, 8.5. 
286. sinaloz (Neotoma), Allen, Bull. Amer. Mus. Nat. Hist., 1898, p. 149. 
SINALOA Woop Rat. 
Type locality. Tatameles, State of Sinaloa, Mexico. 
Geogr. Distr. State of Sinaloa, Mexico. 
Genl. Char. Similar to N. mexicana; tail longer; bulle small. 
Color. Upper parts dark fulvous brown mixed with black; under 
parts, hands and feet white; tail above blackish brown, beneath 
lighter. 
Measurements. Total length, 315-332; tail vertebre, 155-160; 
hind foot, 31-32. Skull: total length, 41.5; basal length, 37; zygo- 
matic width, 21.5; mastoid width, 15.2; interorbital constriction, 
4.8; length of nasals, 15.4; palatal length, 17; length of upper tooth 
Tow, 7. 
287. arenacea (Neotoma), Allen, Bull. Amer. Mus. Nat. Hist., 1898, 
De TsO: 
LOWER CALIFORNIA Woop Rat. 
Type locality. San José del Cabo, Lower California, Mexico. 
Geogr. Distr. Cape Region, Lower California, Mexico. 
Genl. Char. Similar to N. f. macrotis, but smaller and paler; 
intermaxille extending beyond nasals; supraorbital bead on frontals. 
Color. Upper parts grayish brown mixed with black, tinged with 
fulvous; outside of forearm and leg blackish; under parts, hands, and 
feet white; hairs on median band white to roots; rest plumbeous at 
base; tail above blackish brown, beneath grayish white. 
Measurements. Total length, 349; tail vertebre, 164-167; hind 
foot, 35-36. Skull: total length, 46.2; basal length, 41; zygomatic 
width, 23.5; mastoid width, 17.2; interorbital constriction, 5.3; length 
of nasals, 18.2; palatal length, 15; length of upper molar series, 7. 
288. anthonyi (Neotoma), Allen, Bull. Amer. Mus. Nat. Hist., 1808, 
eel SE. 
