396 Mr. G. Dollman on 



breadth 6 ; nasals, greatest length 14, greatest breadth 

 3*4, least breadth 2 ; palatal lengtli 18'5 ; palatilar length 

 15*6 ; length of palatal foramina 6 ; length of upper tooth- 

 row 4-8. 



Hab. Lehufitung, Kalahari. Altitude 3500 feet. 



Tt/pe. Adult female. B.M. no. 10. 6. 3. 33. Original 

 number 27. Collected on May 29th, 1909. 



This sandy-coloured form must evidently be recognized as 

 a desert race of the Namaqualand species, D. auricularis. 

 Tiie resemblance in colour between the cotype of D. auri- 

 crdaris and the specimens from the Kalahari Desert is due to 

 the black hair-tij)s of the cotype having faded to a brownish- 

 red colour, thus giving the skin a general reddish appearance, 

 rather similar to the sandy tint of the desert form. The 

 true colour of D. auricularis is exhibited in a series of 

 recently collected specimens from Kuruman and Namaqua- 

 land, where the general colour of the upper surface and 

 flanks is far less red than in the Kalahari specimens, owing 

 to the predominating olive tint produced by the dark 

 brownish coloured hair-tips mixing with yellowish sub- 

 terminal rings. These dark hair-tips are almost entirely 

 absent in this new form, except down the middle of the back 

 and on the hind part of the head, these regions being slightly 

 darker than the rest of the body. 



"■ This mouse is, I believe, pretty plentiful throughout the 

 drier parts of the Kalahari. I always noticed its holes, 

 generally in little clumps of 3 or 4, around the edges of the 

 dry salt-pans which are scattered all over the desert. The 

 specimen obtained was smoked out of its liole ; they are not 

 easily caught in traps. I have once or twice seen them 

 outside their holes in the daytime." 



14. Dendromus jamesoni, Wrought. 



? (preserved in spirit). Lake Ngami. 



The Ngami Dendromus would appear to be identical with 

 the South African species, D. jamesoni, recently described 

 by Wroughton from Zoutpansberg. Probably the colour of 

 the hair is rather paler than that of the type ; but it is 

 impossible, at present, to decide this point satisfactorily, as 

 the Ngami specimen has been preserved in spirit. 



"I have always found these tree-mice very difficult to 

 catch. The specimen obtained was caught at night on the 

 ground in mopani forest by the light of a bright lantern, 

 which appeared to dazzle it. I know nothing of tjieir 

 habits.^' 



