Mammah fiom British East Africa. 525 



Skull: greatest length 32" 1; basilar length 26*6; con- 

 dylo-incisive length 31; zygomatic breadth 15; breadth of 

 brain-case (across squamosal region) 12"5 ; interorbital 

 breadth 4*7 ; greatest length of nasals 13"5 ; palatilar 

 length 15 ; width of palate (inside m^) 3'2 ; length of 

 palatal foramina 8 ; alveolar length of upper molar 

 series 5*2. 



Hub. Baringo. Altitude 4000 feet. 



Type. Old female. B.^[. no. 10. 12. 19. 27. Original 

 number 1353. Collected on October 10th, 1910. 



The smaller size of this species is at once sufficient to 

 distinguish it from de Winton's E. ugandce. Tliis new form 

 appears to be fairly widely distributed and to occur side by 

 side with the larger species, as is evident by examination of 

 the series of specimens in the Museum collection. Both 

 species were obtained by the Ruweuzori Expedition, and 

 Mr. Kemp has collected E. ugandce and E. effectus at 

 Mumias and Mt. Elgon. There is a considerable range of 

 variation in size and colour presented by the series of 

 specimens from Elgon and Ruwenzori, but not sufficient to 

 indicate that they represent more than one species. As 

 regards the other known forms of this group, the coast 

 species, E. hildtbrandti, is rather similar in size to E. efectus, 

 but greyer and lighter in colour. E. ijanya, recently de- 

 scribed by Heller from the Athi Plains, appears to resemble 

 this new species in general colour, except that the dorsal 

 and ventral surfaces in panya are described as merging 

 gradually into one another, whereas in effectus there is a 

 distinct line of demarcation between the rich buffy tint of 

 the flanks and the white under sui'iiace. The dimensions ot 

 the two species are also conspicuously diiferent. 



It is evident from Heller^'s description of E. panya that 

 it is not generally known that the type specimen of ugandce 

 is a young individual, and to this fact are due both its dark 

 colouring and small size. In the Museum collection is a 

 series of adult specimens from Entebbe, the type locality, 

 received since de ^Vinton described the species, and the 

 following brief description of the appearance of E. ugaiuUe 

 in the adult phase may not here be out of place : — 



Size rather large, hind foot measuring 27 or 28 mm. 

 in length. 



General colour of back dark brown washed with buff, 

 rather darker and blacker down the back and more buffy on 

 the flanks. Buffy tint on flanks gradually merging into the 

 greyish-white underparts. Sides of base buffy orange. 

 Hands and feet white. Underparts dirty white, hairs with 



