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ALLEN: NEW AFRICAN RODENTS. 443 



smaller than the former and apparently a much brighter tawny 

 ochraceous and butt' instead of "dark olive-buff"; from the latter it 

 differs in paler coloration above, as well as below, where it lacks the 

 distinct tinge of strawcolor; moreover it is a shorter tailed animal. 



Description. — Dorsal area from crown to root of tail, tawny ochra- 

 ceous, brightest on the rump, and slightly darkened in the middle of 

 the back by scattered black hairs; base of the tail clear ochraceous. 

 The muzzle between the eyes, the sides of the face, cheeks, forearms, 

 and sides of the body, grayish washed with buffy and slightly darkened 

 by an admixture of scattered black hairs. A narrow line of clear 

 cream-buff due to the overlapping of the buffy tips of the particolored 

 hairs of the sides, sharply bounds the ventral area, which is pure white 

 to the roots of the hairs including those of the sides of the muzzle 

 nearly to the level of the eyes, the throat, belly, and insides of the legs. 

 The wrists, hands, and feet are clear buffy, the toes white. Ears 

 clothed with short tawny ochraceous hairs. Vibrissae black. Tail 

 scantily covered basally with minute buffy hairs, intermingled above 

 with a few blackish hairs, the latter at length predominating above 

 and below so that the terminal third is dark, nearly Prout's brown; 

 the longest of these hairs do not exceed 3 mm. 



Skull. — The skull is small and light, with comparatively short 

 rostrum. There is no incipient postorbital process, but the orbit is 

 bordered dorsally by a line of beading that terminates abruptly about 

 a millimeter anterior to the fronto-parietal suture. The incisive 

 foramina are broad and long, reaching to the level of the first molar. 

 The postero-internal cusp of the first and second molars is unde- 

 veloped, but as in the less typical members of the genus, is represented 

 by a ridge extending back to the hinder margin of the third tubercle 

 of the median series. The anterior edge of the zygomatic plate is 

 vertical and straight, and only slightly notched above. 



Measurements. — The type measured in the flesh : head and body, 

 104 mm.; tail, 149; hind foot, 23; ear from meatus, 15. Skull: 

 greatest length, 27.5; basal length, 22.6; palatal length, 13; nasals, 

 9.2; zygomatic width, 14; interorbital constriction, 4.6; mastoid 

 width, 12; width of palate outside first molar, 5.4; length of incisive 

 foramina, 6; length of molar row (alveoli), 4.5; diastema, 6.8. 



Remarks. — This is probably a pallid and slightly smaller race of 



T. oblitus from near the coast at Voi. The darker coloring and longer 



tail of this coastal species, however, will readily separate it. From 



T. macmillani from the north of Lake Rudolf, it differs equally in less 



dark color, and slightly smaller size, as well as in lacking the prominent 



