Frick: New Abyssinian Rodents. 17 



the upper surface of the tail. The skull measurements of the old adult 

 male (No. 302) the molars of which are much worn, are comparatively 

 small, and similar to those of the type in the foregoing table and com- 

 pare with the less aged but much larger specimen of T. n. nyama. 



Genus Epimys Trouessart. 

 ( Concha Group.) 

 The collection of the author contains specimens of the genus 

 Epimys from widely separated districts of Shoa and Sidamo, which 

 have the "blackish "eye-ring, "bright ochre-colored" hair, and darkly 

 tinted wrists and ankles of Heuglin's description of M. (?) rufidorsalis,^° 

 but which differ from the same in their proportionately greater length 

 of tail and in the white tipping of the fur of their under parts, being 

 pure white, without the "dirty yellowish tinge." The collection also 

 includes specimens from Addis Ababa, Black Abai, Gardula, and 

 Tertale, which lack the dark ocular rings, dark ankles, and light 

 ochraceous sides of rufidorsalis, and resemble Peters' Mus hildebranti " 

 and certain British East African races of the same. 



7. E. rufidorsalis alettensis subsp. nov. 



Type from Aletta, Sidamo, Southern Abyssinia, altitude 6,000 feet. 

 (Original field-number 31, D. G. R., March 6, 1912.) 



General Characters. — Long soft fur, bright ochraceous buff of 

 side-coloration, dark ocular rings and ankles. 



Skull. — Badly broken; of about same size as the larger specimens of 

 hildebranti, but with slightly heavier molars. 



Pelage. — Upper parts bright ochraceous buff ^^ thickly intermixed 

 with black over median dorsal area; under parts grayish white to white. 

 Deep quaker-drab hair of upper coat over median area faintly tipped 

 with ochraceous buff and thickly intermixed with longer black-tipped 

 hair; on shoulders and flanks strongly tipped with ochraceous buff and 

 but very faintly lined with black; outer sides of arms and legs deep 

 mouse-gray washed with buff; fur of under parts and inner sides of 

 arms and legs shorter and tipped with white; dark ocular rings promi- 

 nent; ears large, the distal half dark and finely covered with short hair; 

 vibrissse black and white; throat and chin well-covered, hairs with 



1" Heuglin, "Reise in Nordost-Afrika," Vol. II, p. 70. 

 " Peters MB. Akad. Berlin, 1878, p. 200. 

 12 Ridgway, I. c. (Cf. footnote 4). 



