128 Merriam Three Jfew Kangaroo Mice. 



Museum, Biological Survey Collection. May 11, 1898. H. C. Oberhol- 

 ser. Original Xo. 101. 



Characters. Size slightly larger than megacephalus; pelage long, soft, 

 lax and fluffy; tail decidedly longer and without dark tip; body much paler. 



Color. Upperparts pale buffy fulvous, finely and inconspicuously lined 

 with dark-tipped hairs; underparts, including sides of nose, lower sides 

 of face, legs, feet, and underside of tail white; upperside of tail buffy 

 throughout without dark tip. 



Cranial characters. Skull essentially as in megacephalas. 



Measurements. Type specimen ( 9 ad.): total length 171; tail vertebrae 

 102; hind foot 25.. 1. 



Microdipodops californicus sp. nov. 



Type from Sierra Valley, near Vinton, Plumas County, California. 

 Xo. 101,227, $ yg-ad., U. S. National Museum, Biological Survey Col 

 lection. August 7, 1900. Walter K. Fisher. Original Xo. 159(5. 



Characters. Size of megacephalus; tail and hind foot longer; pelage 

 more compact and less fluffy than in the other species; color olivaceous 

 underparts and head markings snow white. 



Color. Upperparts olivaceous, finely and inconspicuously lined with 

 dark-tipped hairs; underparts, feet, sides of nose, spot over eye, patch 

 behind ear, and mark on upper and lower folds of ear, snow white; tail 

 above pale buffy fulvous becoming blackish toward tip; below white 

 throughout; side of face below body-color, and outer side of foreleg, 

 washed with pale buffy fulvous. 



Cranial characters. Skull as a whole similar to lhat of megacephalus 

 but decidedly smaller, due chiefly to smaller size of audital capsules, 

 the skull proper being about the same size; notch between bulging bulke 

 posteriorly broader; nasals decidedly more slender. 



Measurements. Type specimen ( $ yg-ad.): total length 158; tail verte- 

 bra3 91; hind foot 25. Average of 10 from type locality: total length 

 100; tail vertebra? 92; hind foot 25. 



*Xorth America Fauna Xo. 5; pp. 115-117, August, 1891. 



