PEROMYSCUS. 189 



Color. Upper parts bistre brown, beneath slaty buff; tail dark 

 brown above and beneath; hands and feet silvery white. 



Measurements. Total length, 191; tail, 92; hind foot, 22; ear, 17. 

 Skull: greatest length, 30.5; basal length, 25; Hensel, 23.1; greatest 

 breadth, 15.4; length of nasals, 12X3.3; interorbital constriction, 

 4.6; palatal length, 12.4; length of upper molar series, 4.1; length of 

 mandible, condyle to tip of incisor, 18; height of coronoid process, 7.3. 



rotrlt'iji pinulis (Sitomys}, Miller, Bull. Am. Mus. Nat. Hist., 1893, 



P- 33i. 

 rowleyi pinalis (Peromyscus) , Elliot, Syn. N. Am. Mamm., 1901, 



P- 135- 

 ROWLEY'S PINE MOUSE. 



Type locality. Granite Gap, Grant County, New Mexico. 



Geogr. Distr. State of Sonora, Mexico, north to New Mexico and 

 Arizona. 



Genl. Char. Smaller than P. rowleyi, more yellowish in color. 



Color. Above olive buff, darker on dorsal region, and grayer on 

 head and face; hairs sepia-tipped; indistinct orbital ring; feet and 

 under parts pure white; tail brown above, white beneath. 



Measurements. Total length, 196; tail, 104; hind foot, 23; ear, 

 20. (ex Type.) Skull: occipito-nasal length, 26; Hensel, 19; zygo- 

 matic width, 13; interorbital constriction, 5; palatal length, 10.5; 

 length of nasals, 9.5 ; length of upper molar series, 4. 



150. martirensis (Sitomys}, Allen, Bull. Amer. Mus. Nat. Hist., 



1893, p. 187. 

 SAN PEDRO MARTIR MOUNTAINS MOUSE. 



Type locality. San Pedro Martir Mountains, Lower California, 

 Mexico. Altitude, 7,000 feet. 



Geogr. Distr. San Pedro Martir and Hanson Laguna Mountains, 

 Lower California, Mexico. Altitude above 5,000 feet. 



Genl. Char. Similar to P. truii; tail longer. 



Color. Above pale yellowish brown, varied with blackish; sides 

 tawny; under parts white; sometimes a tawny pectoral spot; orbital 

 ring blackish; ears naked, dusky; hands and feet white; tail above 

 blackish, beneath grayish white. 



Measurements. Total length, 195; tail vertebrae, 102; hind foot, 

 22. Skull: total length, 28; basilar length, 23.4; Hensel, 21; zygo- 

 matic width, 13.7; interorbital constriction, 5; length of nasals, 10; 

 palatal length, n; width of braincase, 13; length of upper molar 

 series, 4; length of mandible, 9.5; length of lower molar series, 4. 



151. banderanus (P eromy sous') , Allen, Bull. Am. Mus. Nat. Hist., 



1897, p. 51. 



