176 CALIFORNIA MAMMALS. 



Mount Shasta and the Sierra Nevada. They frequent the 

 mountain meadows and grassy locahties along streams. They do 

 not seem to be common in many places and I did not find them 

 easily trapped. I got but four, three of these being taken in traps 

 set for meadow-mice, and the fourth in a steel trap set in shalloAv 

 water in a small stream below a spring in a mountain beaver run- 

 way. As the pan of the trap was close to or above the surface of 

 the water it is probable that the Jumping-Mouse used it as a step- 

 ping stone in crossing the stream, which passed through coarse 

 grass which nearly met over it. These four animals were taken at 

 various altitudes from 5,000 to 9,000^ feet. The breeding habits 

 are probably similar to those of the eastern species, which some- 

 times have two litters annually, of four to six each. 



Zapus orarius Osgood. 



COAST JUMPING-MOUSE. 



Sides of body and head dark ochraceous, moderately mixed 

 with black ; dorsal band not sharply defined and suffused with the 

 color of the sides ; lower parts strongly suffused with ochraeous, 

 the sides of the throat deeper ochraceous ; feet yellowish white ; 

 tail grayish above and yellowish white below ; upper incisors slen- 

 der and more projecting than usual ; rostrum short and consider- 

 ably deflected; nasals very narrow anteriorly; interorbital con- 

 striction narrow ; audital bulte small and rather near together. 



Length about 220 mm. (8.65 inches) ; tail vertebrae 127 (5) ; 

 hind foot 30 (1.20). 



Type locality. Point Reyes, California. 



Only known from the coast region of Caifornia from Point 

 Reyes to Humboldt Bay. Evidently rare in this region. 



Zapus pacificus Merriam. (Of the Pacific Coast.) 



PACIFIC JUMPING-MOUSE. 



Dorsal area not sharply defined, but so strongly sufifused with 

 yellowish that the yellow predominates over the black ; sides buffy- 



