Mrrr/iini — Fi>i'r Xrir (Inisshopper Mire. 125 



white. Upperparts buffy, deepest on niiiii) ; face from nose to eyes whitish, 

 faintly washed with buff; rJiccks, legft, and iJiii/hs miow-wJiilc like under- 

 ])arts. 



Skull, compared with that of /xiUi'.'troix, smaller and weaker, braincase 

 narrower, more rounded (less flattened on top) ; rostrum weaker; zygomata 

 much narrower and rounded off anteriorly, slightly spreading posteriorly. 

 [In iHillt'Kfcns as in Icucof/aster they stand out nuich farther and more 

 sqaarelj\ enclosing a nmch larger orbital fossa.] 



Meamirements. — Type specimen: Total length, 160; tail vertebrae, '60; 

 hind foot, 23. 



Remarks. — The type specimen, which is in fresh winter pelage, has long 

 soft fur and is the most beautiful mouse I have ever seen. With it are two 

 young-adults, not quite full grown, from the same locality. One of these 

 is like the type, only not quite so pale ; the other has the upperparts pale 

 smoke-gray slightly suffused with buffy. 



