EVOTOMVS. 173 



Color. Dorsal area, pale rusty rufous; sides buff)' clay color; 

 beneath plumbeous, washed with whitish; feet gray. Tail, brownish 

 above, buffy below. 



.\reasiirements. Total length, 148; tail vertebrae, 39.6; hind 

 foot, 19. 



b.—rhoadsi. {Evo/omys), Stone, Amer. Nat., 1893, p. 54. 



Type locality. Mays Landing, New Jersey. 



Geogr. Distr. Type locality only. 



Genl. Char. Similar to E. gappcri, dorsal stripe slightly darker; 

 tail shorter; hind foot larger. 



Color. Above chestnut; sides buff}^ graj'; beneath washed with 

 whitish, rest as in E. gappcri. 



Afcasiircmciils. Total length, 139-3; tail vertebra?, 36; hind 

 foot, 20. 



c.—loringl. (Evo/omys), Bailey, Proc. Biol. Soc. Wash., 1897, p. 125. 



Type locality. Portland, North Dakota. 



Gcogr. Distr. Timbered valleys on edge of plains in Minnesota, 

 and eastern North and South Dakota. 



Genl. Char. Size very small; colors bright; skull slender. 



Color. Winter Pelage. Above reddish hazel, hoary; face, sides 

 and rump grayish ash washed with buffy; beneath pure white; feet 

 white. Tail, blackish above, whitish below. White and gra3ish 

 spots over side glands. 



Summer Pelage. Above dark chestnut; face and sides pale bister, 

 suffused with yellowish; beneath washed with whitish, feet dusky; 

 tail darker than in winter; side spots in male sooty gray. 



Measurements. Average total length, 123; tail vertebrae, 31.5; 

 hind foot, 17.9. Skull: basal length, 21.5; nasals, 6.8; zygomatic 

 breadth, 12.8; mastoid breadth, lo.g; length of upper molar series, 5. 



d.—^alei. (Evotomys), Merr. , N. Amer. Faun., No. 4, p. 23, pi. 11, 



fig- 3- 



Type locality. Ward, Boulder County, Colorado. 



Geogr. Distr. Mountains of Colorado, north on eastern ranges 

 of Rocky Mountains to northern Montana. 



Genl. Char. Similar to P. gappcri, but larger; longer tail; col- 

 ors lighter; skull with prominent superciliary ridges in old individ- 

 uals. 



Color. Winter Pelage. Above reddish chestnut: sides and face 

 buffy gray; feet and belly whitish or yellowish gray. Tail, blackish 

 above, whitish beneath. 



Summer Pelage. Dorsal stripe darker; sides and (ace clear gray; 

 feet gray. 



