PEROMYSCUS. 203 
width, 115.5; interorbital constriction, 4.9; length of nasals, 10.2; 
length of upper molar series, 4.9. 
172b. zelotes (Peromyscus), Osgood, Proc. Biol. Soc. Wash., xvu, 
1904, p. 67. 
ENERGETIC Mouse. 
Type locality. Querendaro, State of Michoacan, Mexico. 
Genl. Char. Similar to P. melanophrys; tail longer than head 
and body. 
Color. “Similar in general to P. melanophrys, but facial region 
more suffused with tawny and the gray very much reduced; somewhat 
similar to P. levipes, but paler throughout; no trace of a pectoral 
spot.”’ 
Measurements. Total length, 218; tail vertebre, 115; hind foot, 
23. Skull: greatest length, 28.3; Hensel, 21.6; zygomatic width, 
14.2; interorbital constriction, 4.9; length of nasals, 10.6; length of 
upper molar series, 4.6. 
173. insignis (Peromyscus), Rhoads, Proc. Acad. Nat. Scien. Phil., 
1895, p. 33. Elliot, Syn. N. Am. Mamm., 1901, p. 138. 
SACHEM OR CHIEF MOUSE. 
Type locality. Dulzura, San Diego County, California. 
Geogr. Distr. Southern California, and Lower California, Mexico. 
Genl. Char. Size large; tail very long, exceeding head and body. 
Color. Above light brownish gray, mingled with black; darkest 
on back, brownest on rump and thighs; flanks ochraceous; hands, 
feet, and under surface grayish white; tail above sooty, below grayish 
white. 
Measurements. Total length, 233; tail vertebre, 132; hind foot, 
26; ear, 23. Skull: occipito-nasal length, 29; Hensel, 11; zygomatic 
width, 9; interorbital constriction, 4; length of nasals, 11; palatal 
length, 11; length of upper molar series, 4. 
174. californicus (Mus), Gambel, Proc. Acad. Nat. Scien. Phil., 
1848, p. 78. 
califjornicus (Peromyscus), Elliot, Syn. N. Am. Mamm., 1901, p. 137 
CALIFORNIA MOUSE. 
Type locality. Monterey, Monterey County, California. 
Geogr. Distr. Lower California, Mexico, north along the coast of 
California. 
Genl. Char. Size large; tail long; ears large, sparsely haired. 
Color. Above dark gray mixed with light brown; sides fulvous; 
under parts grayish buff; tail blackish brown above, whitish below. 
Measurements. Total length, 265; tail vertebre, 142; hind foot, 
