RH1THRODONTOMYS. 263 



Color. Above yellowish brown lined with black, darkest on 

 dorsal region and top of head ; sides paler and with less black ; under 

 parts gray; hands and feet white; tail above dark brown, beneath 

 whitish. 



Measurements. Total length, 149; tail vertebrae, 73; hind foot, 19. 



h. allii'nlii (Reithrodontomys!), Merr., Proc. Wash. Acad. Scien., 



in, 1901, p. 556. 

 Mm -STAIN HARVEST MOUSE. 



Type locality. Cerro San Felipe, Oaxaca City, State of Oaxaca, 

 Mexico. Altitude, 10,000 feet. 



Genl. Char. "Similar to R. saturatus, but tail somewhat shorter; 

 rostrum shorter; bullae larger." 



Color. Above yellowish brown, tinged with rufous and heavily 

 lined with black; sides less black; under parts gray; plumbeous of 

 under fur showing through; tail above dark brown, beneath whitish; 

 hands and feet white; ears brown. 



Measurements. Total length, 153; tail vertebrae, 75; hind foot, 19. 



253. peninsula? (Rhithrodontomys) , Elliot, Pub. Field Columb. Mus., 



in, 1903, p. 164. Zoology. 

 PENINSULAR HARVEST MOUSE. 



Type locality. San Quentin, Lower California, Mexico. 



Genl. Char. Tail about half the total length; pelage more red 

 than that of R. longicaudns, with longer tail and hind feet and 

 much larger ears ; skull larger, nasals longer, braincase broader, 

 interorbital space of nearly equal width throughout, sides nearly 

 parallel. 



Color. Above, sides of head, and body, and on thighs reddish 

 brown, deepest on thighs and rump and darkest on dorsal region, 

 which part is mixed with black; under parts white or grayish white, 

 the plumbeous under fur showing; a dark ochraceous spot on sides 

 of chest and a paler one on middle of chest between the arms; tail 

 dusky brown above, white beneath; hands and feet white, ears dark 

 brown. 



Measurements. Total length, 170; tail vertebrae, 89; hind foot, 

 17.5; ear, 16. Skull: occipito-nasal length, 27; Hensel, 20; zygo- 

 matic breadth, 10; interorbital constriction, 3; palatal length, 8.5; 

 length of nasals, 13.5. 



254. difficilis (Reithrodontomys!}, Merr., Proc. Wash. Acad. Scien., 



in, 1901, p. 556. 

 CAPTIOUS HARVEST MOUSE. 



Type locality. Orizaba, State of Vera Cruz, Mexico. Altitude, 

 4,500 feet. 



