AI-R. 1903. NEW SPECIES AND SUBSPECIES OF MAMMALSELLIOT. 157 



Peromyscus *hemionotis. Sp. nov. 



Type locality, Rosarito Divide, 5,000 feet elevation, San 

 Pedro Martir mountains, Lower California, Mexico. 



Geogr. distr. Only known from type locality. 



Gen. char. Similar in color to P. e. stephensi, but larger, with 

 enormous ears and very long tail. 



Color. Nose and tufts in front of ears dark gray; top of head and 

 upper parts cream buff finely lined with black; bright ochraceous 

 lateral line from lips to root of tail; under parts pure white, base 

 of hairs plumbeous, showing through; hands and feet white; tail 

 above brownish black; beneath white; ears dark brown. 



Measurements. Total length, 222; tail vertebrae, 126; hind 

 foot, 22.5; ear, 25.5. Skull: occipito-nasal length, 27; Hensel, 

 20.3; zygomatic width, 13; interorbital constriction, 4.5; breadth 

 of brain case, 13; palatal arch to alveoli of incisors, 10.5; length 

 of nasals, 10; greatest breadth of rostrum, 4; length of upper tooth 

 row, 4; length of mandible, angle to alveolus of incisor, u. 



Only two specimens of this mouse were procured, character- 

 ized by its enormous ears and very long tail. Mr. Heller writes 

 that it seemed to be very rare, and he was unable to obtain more 

 examples. It has a general grayish buff appearance, similar to 

 P. e. stephensi, but the coloring is not so bright. It is a much 

 larger animal, as the measurements show. 



Peromyscus tgaurus. 



Type locality. San Antonio, San Pedro Martir mountains, 

 Lower California, Mexico. 



Gen. char. Size moderately large, tail very long, colors pale, 

 skull with broad brain case, nasals long, interorbital space 

 broad. 



Color. Above ochraceous buff, finely lined with black, deepest 

 * and brightest on lower back and rump, becoming grayish cream 

 buff on upper back and top of head and. nose, lined with black; 

 cheeks, sides, thighs and upper parts of arms bright ochraceous 

 buff; upper lip, chin, inner side of arms and legs and entire 

 under parts pure white, the plumbeous of under fur showing 

 through; hands and feet white; tail above dark wood brown, 

 beneath cream color; ears blackish brown. 



Measurements. Total length, 222-; tail vertebrae, 122; hind 

 foot, 22; ear, 20. Skull: occipito-nasal length, 27; Hensel, 21: 



*///uzot> o?, a mule; ovS, 'card?, an ear. 

 +yvivpo6, frisky. 



