102 CALIFORNIA MAMMALS. 



including the feet, sides of face nearly tO' the level oi the eyes 

 and nose; upper third of tail similar to the back, the remainder 

 white, usually including the tip; nasals long and pointed; a more 

 or less distinct supraorbital bead. Immature ; mouse gray above. 



Length about 140 mm. (5.50 inches); tail vertebrae 53 

 (2.10) ; hind foot 201 (.80) ; ear from crown 15 (.60). 



Type locality, San Bernardino Valley, California. 



San Bernardino Grasshopper Mice inhabit the valleys of 

 southwestern California and northwestern Lower California. They 

 are more frequently found in sandy land in valleys, but are no- 

 where common. I have taken them along the seashore and in 

 the foothills, but not in the mountains. They are more car- 

 nivorous than is usual with this family, the food consisting oI 

 insects, such as grasshoppers, beetles and larv^. They attack 

 other mice and often devour parts of such mice as they find 

 caught in the collectors' traps. They take grain bait, but meat 

 bait is preferred. They have a musky odor. They decay more 

 readily than common mice, probabl because of their carnivorous 

 diet. The young are about four in number and are born in 

 March, April, May and June. The mammas are six in number, 

 one pair pectoral and two pairs inguinal. 



Onychomys torridus perpallidus Mearns. (Very pale.) 



YUMA GRASSHOPPER MOUSE. 



Pelage long and soft; above vinaceous cinnamon, the hairs 

 tipped with black, sometimes producing a dark dorsal band ; nose, 

 face nearly to eyes, feet and belly white; basal three fourths of 

 tail on the upper side mixed dusky and white; tip and underside 

 of tail white. 



Length about 155 mm*. (6 inches) ; tail vertebrae 57 (2.25) ; 

 hind foot 22 (.87) ; ear from crown 16 (.63). 



Type locality, Boundary Monument No. 204 (below Yuma, 

 Arizona). 



The Yuma Grasshopper Mice seem to be local in distribu- 



