MUKID^ 113 



Reithrodontomys megalotis deserti Allen. (Large 

 ear; of the desert.) 



DESERT HARVEST MOUSE. 



Similar to longicaiidus ; grayer, with fewer black haiirs 

 mixed through the pelage of the back ; ears broader and averaging 

 higher. 



Length about 140 mm. (5.50 inches); tail vertebrae 73 

 (2.87) ; hind foot 17 (.67). 



Type locality, Oasis Valley, southwestern Nevada. 



Desert Harvest Mice occur in patches of grass and weeds 

 around springs and the infrequent small streams of southern Ne- 

 vada and the adjoining part of California, west to the foot of 

 the Sierra Nevada, and south to northeastern Lower California. 

 Their habits are similar to those of the Long-tailed Harvest 

 Mice, but they reach a somewhat higher altitude. 



Reithrodontomys klamathensis Merriam. (Of Klam- 

 ath Valley.) 



KLAMATH HARVEST MOUSE. 



"Upper parts pale grayish brown, washed with buffy on 

 sides; under parts white; tail bicolor, dusky above, whitish be- 

 low ; ears and hind feet large." 



Length 144 mm. (5.70 inches) ; tail vertebrae 66 (2.60) ; 

 hind foot 18.5 (.73). 



Type locality, Shasta Valley, California. 



Said to be rather common from the base of Mount Shasta 

 north and northeast. I have not seen this species. 



Subfamily Neotominae. 



Skull long and narrow; rostrum long; nasals projecting 

 beyond premaxillaries; enlargement at root of lower incisor near 

 base of condylar process greatest on outer surface ; tip of angu- 

 lar process of lower jaw below plane of summits of molars ; notch 

 between tip of angular process and condyle very shallow ; molars 



