176 PEROMYSCUS. 
Color. Above drab gray and black, tinged with tawny; under 
parts buffy; tail above like back, beneath paler. 
Measurements. Total length, 123; tail vertebre, 48; hind foot, 
17; ear, 5.5 (dried skin). 
a.—brunneus (Peromyscus), Allen & Chapman, Bull. Amer. Mus. 
Nat. Hist., 1897, p: 209. 
JALAPA Brown Mouse. 
Type locality. Jalapa, State of Vera Cruz, Mexico. 
Geogr. Distr. State of Vera Cruz, Mexico; range unknown. 
Genl. Char. Smaller than P. musculus, and darker. 
Color. Upper parts drab gray thickly flecked with buff, tinged 
with rufous, and varied with black; sides similar but paler; under 
parts yellowish; ears dark brown; tail above dark brown, beneath 
paler; hands and feet whitish. 
Measurements. Total length, 121; tail vertebre, 48; hind foot, 
I5; ear, 13. Skull: total length, 15; basal length, 12.5; zygomatic 
breadth, 11; interorbital constriction, 4; length of nasals, 7.5; palatal 
length, 7; length of upper tooth row, 3.2. (ex Type.) 
b.—nisrescens (Peromyscus), Osgood, Proc. Biol. Soc. Wash., xvi, 
1904, p. 76. 
Sooty Mouse. 
Type locality. Valley of Comitan, State of Chiapas, Mexico. 
Genl. Char. Similar to P. musculus, but darker. 
Color. Upper parts mixed Vandyke brown and sooty blackish; 
under parts cream buff; tail dusky above, paler beneath. 
Measurements. Total length, 113-120; tail vertebrae, 40-45; hind 
foot, 14.5-16. Skull: greatest length, 20.1; Hensel, 15.2; zygomatic 
width, 10.5; interorbital constriction, 3.4; length of nasals, 8; inter- 
parietal, 6.4; palate, 2.8; length of upper molar series, 3.2. 
129. paulus (Peromyscus), Allen, Bull. Am. Mus. Nat. Hist., 1903, p. 598. 
Tiny Mouvuse. 
Type locality. Rio Sestin, State of Durango, Mexico. 
Genl. Char. Smaller than P. musculus, color lighter and grayer. 
Color. Upper parts gray brown suffused with pinkish buff; 
under parts grayish white, base of hairs plumbeous, tips whitish; 
belly sometimes tinged with buff. 
Measurements. Total length, 108; head and body, 62; tail verte- 
bre, 44; hind foot, 14; ear from notch, 13; from crown, It. 
130. thurberi. 
americanus thurberi (Sitomys), Allen, Bull. Am. Mus. Nat. Hist., 
1893, p. 185. 
