ONYCHOMYS. 167 



PALE MOLE MOUSE. 



Type locality. Moki Pueblos, Apache County, Arizona. 



Geogr. Distr. State of Chihuahua, Mexico, into Arizona. 



Genl. Char. Size large, exceeded only by O. longipes of Concho 

 County, Texas; ears, feet, and tail much as in O. melanophrys ; fur 

 full, long, and soft; orbital ring absent or inconspicuous; lanuginous 

 tuft at base of ear well developed. 



Color. Above pale tawny cinnamon, palest anteriorly, and 

 brightest on the flanks and rump, not noticeably mixed with black- 

 tipped hairs; below pure white to the roots of hairs. 



Measurements. Total length, 168; head and body, 125; tail, 45; 

 hind foot, 22; ear from crown, 12; from anterior root, 16.5. (Merr. , 

 1. c.) Skull: occipito-nasal length, 20; Hensel, 23; zygomatic width, 

 15; interorbital constriction, 5; length of nasals, n; palatal length, 

 ii ; length of upper molar series, 4. 



124. ramona (Onychomys) , Rhoads, Am. Nat., xxvn, 1893, p. 833. 



Elliot, Syn. N. Am. Mamm., 1901, p. 121. 

 RAMONA MOLE MOUSE. 



Type locality. San Bernardino Valley, California. 



Geogr. Distr. Lower California, Mexico, and southern California. 



Genl. Char. Larger than O. torridus, with larger ears. 



Color. Similar to O. longicaudus ; above grayish vinaceous buff, 

 dorsal part darker; beneath white; tail bicolor, dark above, lighter 

 below. 



Measurements. Total length, 147 ; tail vertebrae, 48; hind foot, 18; 

 ear, 12. Skull: Hensel, 19; zygomatic breadth, 32.6; parietal breadth, 

 11.5; interorbital constriction, 5; length of nasals, 10; from foramen 

 magnum to incisive foramina, 13.4; length of upper molar series, 

 alveolar border, 3.8; length of mandible, 15; height of coronoid 

 process, 6.8. 



FIG. XXXVI. ONYCHOMYS TORRIDUS. TROPICAL MOLE MOUSE. 



125. torridus (Onychomys} , Coues, Proc. Acad. Nat. Scien. Phil., 

 1874, p. 183. Elliot, Syn. N. Am. Mamm., 1901, p. 122. 



