46 PEROMYSCUS. 



Type locality. Ceralbo Island, off east coast of Lower California, 

 Mexico. 



Genl. Char. Similar to P. e. eva, but larger, ears smaller, teeth 

 larger. 



Color. Upperparts like P. e. eva mixed ochraceous and dusky; 

 entire underparts cream-buff; tail above, blackish brown, beneath 

 dull white. No pectoral spot. Ex type in United States National 

 Museum. 



Measurements. Total length, 212; tail, 108.2; hind foot, 28.3 

 (skin). Skull: Occipito-nasal length, 25.6; Hensel, 20; zygomatic 

 width, 13.2; intertemporal width, 4; length of nasals, 10.2; length of 

 mandible, 12.4; length of lower molar series, 4.5. Ex type in United 

 States National Museum. 



Peromyscus eremicus polypolius Osgood. 



Peromyscus eremicus polypolius Osgood, N. Am. Fauna, No. 28, 

 1909, p. 248. 



Type locality. Margarita Island, off the east coast of southern 

 California, Mexico. 



Genl. Char. Similar to P. e. eva, but grayer; rostrum more de- 

 pressed; braincase shorter, more inflated. 



Color. Upperparts a mixture of gray, dusky and pinkish buff, 

 grayest on head and shoulders; a narrow streak on cheeks and lower 

 sides pale ochraceous buff; underparts pale cream-buff; hands and 

 feet white, ankles dusky; tail above dusky, beneath mixed whitish 

 gray and dusky. Ex type in United States National Museum. 



Measurements. Total length, 192; tail, 99.5; hind foot, 17.5 (skin). 

 Skull: Occipito-nasal length, 24; Hensel, 17.5; zygomatic width, 

 1 2. i ; intertemporal width, 4.2; length of nasals, 8.70; length of upper 

 molar series, 3.7; length of mandible, 9.2; length of lower molar series 

 4.1. Ex type in United States National Museum. 



Peromyscus eremicus carmeni Townsend. 



Peromyscus eremicus carmeni Townsend, Bull. Am. Mus. Nat. Hist., 

 XXXI, 1912, p. 126. 



Type locality. Carmen Island, Gulf of California, Mexico. 



Genl. Char. Similar to P. e. eva, but grayer, less rufescent. 



Color. Forepart of head and nose grayish buff; top of head and 

 entire Upperparts pale ochraceous-buff; finely lined with black; flanks 

 pale ochraceous-buff; entire underparts and inner side of limbs white, 

 the plumbeous under-fur showing, especially on the hind legs; hands 

 and feet white, tail above dark brown, beneath whitish. Ex type 

 in United States National Museum. 



