336 Mr. G. Dollman on Ar/icanthis abjsslnicus 



with white. No ochraceous 

 or bufi-coloured sutfuaion. 



(Nairobi.) (10) a. nairobce, Allen. 



b*. Backs of hands and feet 

 orange-huff. Ventral sur- 

 face grey, washed with 

 buffy white. General co- 

 lour of back yellowish olive, 

 mixed with black and ochra- 

 ceous. (Naivasha.) (11) (i. jircvceps, Wrought. 



c*. Backs of hands and feet 

 brownish, mixed with buff. 

 Ventral surface greyish 

 white, tinted with pale buff. 

 General colour of back dark 

 ochraceous. (Iraugi, Ger- 

 man E. Africa.) (1:.') a. neumanni, Matsch. 



c. Size of body small ; length ol head and 



body less than 135 mm. 



a'. Size larger; length of headand body 



more than 125 mm. 



«-. General colour greyish olive, 



faintly tinged with pale butt. 



Backs of hands and feet gre3^ 



Ventral surface greyish white. 



(Kumruti, Laikipia I'lateau.) . . (14) ruinruti, Bollm. 



b"^. General colour sandy ochraceous, 



strongly tinged with bull'. Backs 



of hands and feet white, tinted 



with buif. Belly bully white. 



a^. Tail longer, 122 mm. in length. 



Skull larger, greatest length 



34 mm. (Chanler Falls, Eusso 



Nyiro.) (17) chanleri, Dollm. 



h^. Tail shorter, averaging 99 mm. 

 in length. Skull smaller, 

 greatest length 30 mm, (So- 



maliland.) (15) somalictts, Thos. 



fc' . Size smaller ; length of head and 

 body less than 125 mm. (Eusso 

 Nyiro, E. Africa.) (16) reptam, Dollm. 



(1) Arvi'cantltis testicuhvis, Sund. 



Isotnys tesHciilaris, Sundevall, Vet.-Akad. Ilandl. p. 221 (1S43). 



Size comparatively large, tail very long. General colour 

 of dorsal surface pale sandy ochraceous lined with black. 

 Dorsal stripe narrow and ill-delined, in some case.<? entirely 

 absent. In bleached individuals the ochraceous colouring is 

 much more evident, especially on the hiiid-quarteis and 

 posterior part of back. Flanks rather lighter than back and 

 more buffy. Nasiil region orange-buff, the buff colour iu 

 some cases extending back on to the face. Ears clothed with 



