202 PEROMYSCUS. 
26; ear above notch, 19.4. (ex Type.) Skull: total length, 30; 
width, 17. 
a.—zamore (Peromyscus), Osgood, Proc. Biol. Soc. Wash., xvi, 
1904, p. 65. 
ZAMORA MOUSE. 
Type locality. Zamora, State of Michoacan, Mexico. 
Genl. Char. Similar to P. melanophrys; tawny band across 
pectoral region. 
Color. Like P. melanophrys, but darker; tawny pectoral band; 
tail above black. 
Measurements. Total length, 260; tail vertebre, 141; hind foot, 
29. Skull: adults, greatest length, 31.3-32; Hensel, 25—25.9; zygo- 
matic width, 16.5—-16.9; length of nasals, 12-12; length of upper 
molar series, 4.7—4.8. 
b.—consobrinus (Peromyscus), Osgood, Proc. Biol. Soc. Wash., xvu, 
1904, p. 66. 
KINDRED MOUSE. 
Type locality. Berriozabal, State of Zacatecas, Mexico. 
Genl. Char. Similar to P. melanophrys, but tail shorter. Skull 
with larger audital bulla; shorter and broader nasals; brain case 
more bulging. 
Color. Upper parts and sides tawny ochraceous thickly lined with 
black; lateral line tawny; orbital ring black; sides of face grayish; 
pectoral spot tawny; under parts creamy white; tail white beneath; 
hands and feet creamy white; ankles dusky. 
Measurements. Total length, 250; tail vertebre, 131; hind foot, 
26.5. Skull: greatest length, 30.8; Hensel, 25.3; zygomatic width, 
16.3; interorbital constriction, 4.9; length of nasals, 11.1; palate, 
4.4; length of upper molar series, 4.7. 
172a. xenurus (Peromyscus), Osgood, Proc. Biol. Soc. Wash., xv, 
1904, p. 67. 
Opp-TAILED Mouse. 
Type locality. Durango, State of Durango, Mexico. 
Genl. Char. Tail black, with ventral white line; large pectoral 
spot. 
Color. Upper parts grayish fawn mixed with black; rump fawn; 
cheeks mixed fawn and gray; large pectoral spot bright fawn; under 
parts white; tail black all around, except a narrow white stripe 
beneath; hind feet dusky brown to base of toes, latter creamy white. 
Measurements. Total length, 246-248; tail vertebre, 140-142; 
hind foot, 28. Skull: greatest length, 30; Hensel, 23.8; zygomatic 
