152 REITHRODONTOMYS. 



rump; beneath grayish white tinged often with j-ellow, and frequently 

 with a fulvous spot on the breast. Ears dusky, rusty brown tuft at 

 the anterior base. Feet whitish. Tail dusky above, grayish white 

 below. 



Measurements. Average total length, 136.5; tail vertebrae, 72; 

 hind foot, 17: ear, 11. 2. 



II. — pallidubP. (Reithrodontomys), Rhoads, Amer. Nat. 1893, p. 835. 



Type locality. Santa Isabel, California. 



Geogr. Distr. Southern California and northern Lower Califor- 

 nia, from Monterey Count}' and Merced County southward. 



Genl. Char. Larger than R. longicaudus and paler. 



Color. Above buffy gray, darker on dorsal line; face and lateral 

 line ochraceous. Under parts and feet white, spot between fore legs 

 and on breast buff. Tail bicolor. 



Measurements. Total length, 137; tail vertebrae, 73; hind foot, 16. 



211. chrysotis. {Reithrodontomys"), Elliot, Pub. Field Columb. Mus., 



1899, p. 281, Zoology. 



Type locality. Dougherty, Indian Territory. 



Geogr. Distr. Only known from type locality. 



Genl. Char. Similar to R. longicaudus, but larger; tail longer, 

 feet larger, and ears conspicuously colored inside with orange. 



Color. Above blackish brown mixed with yellow; sides of head 

 and body and upper part of fore legs yellowish brown, almost golden 

 on flanks. Under parts white. Feet grayish white. Tail brownish 

 black above, white beneath. Inside of ears orange. 



Measurements. Total length, 153; tail vertebrae, 79; hind foot, 

 20; ear, 15. Skull: occipito-nasal length, 21.5; orbital constriction, 

 3; length of nasals, g; width at base. 3; mastoid breadth, 10; zygo- 

 matic breadth, 12; length of pterygoid, 4; palate, 4: of Hensel, 16; 

 greatest breadth of molars outside anteriorly, 4.5. 



212. klamathensis. yRcitluodontomys), Merr. , N. Am. Faun., No. 16, 



1899, p. 93. 



Type locality. Big Spring, Shasta Valley, California. 



Geogr. Distr. Shasta Valley, California, and Klamath County, 

 Oregon. 



Genl. Char. Size medium; ears and hind feet large; tail long; 

 paler in color than R. longicaudus. Skull: rostrum broad; audita! 

 bullae small. 



Color, .'\bove pale grayish brown, washed with buffy on sides; 

 beneath white. Tail above dusky, below whitish. 



Measurements. Total length, 149; tail vertebra;, 71 ; hind foot, 19. 



