﻿.320 
  Mr. 
  G. 
  Doll 
  man 
  on 
  

  

  distinguishable 
  from 
  X. 
  dabagala 
  rufifrons, 
  where 
  the 
  rufous 
  

   area 
  spreads 
  on 
  to 
  the 
  forehead 
  and 
  head. 
  

  

  Graphiurus 
  microtis 
  saturatus, 
  Dollm. 
  

   ? 
  . 
  1548, 
  1707. 
  Solai, 
  Mount 
  Kenya. 
  

  

  Dipodillus 
  diminutus, 
  sp. 
  n. 
  

  

  Allied 
  to 
  Dipodillus 
  harwoodi, 
  Thos., 
  but 
  smaller 
  in 
  size, 
  

   with 
  much 
  smaller 
  teeth, 
  and 
  more 
  rufous 
  in 
  colour. 
  

  

  Size 
  and 
  proportions 
  less 
  than 
  in 
  D. 
  harwoodi. 
  General 
  

   colour 
  of 
  upper 
  surface 
  bright 
  orange-rufous 
  (between 
  bistre 
  

   no. 
  3 
  and 
  tan-colour 
  no. 
  2, 
  'Repertoire 
  de 
  Couleurs'), 
  

   slightly 
  darker 
  down 
  the 
  middle 
  of 
  the 
  back, 
  but 
  not 
  nearly 
  

   so 
  much 
  as 
  in 
  harwoodi. 
  Hairs 
  of 
  back 
  with 
  pale 
  slate-grey 
  

   bases, 
  bright 
  orange-buff 
  subterminal 
  rings, 
  and 
  short 
  

   brownish 
  tips. 
  Flanks 
  pure 
  orange-buff 
  iu 
  colour, 
  hairs 
  with 
  

   light 
  grey 
  bases 
  paling 
  to 
  white 
  towards 
  the 
  tips 
  ; 
  subter- 
  

   minal 
  rings 
  orange-buff, 
  extreme 
  tips 
  of 
  hairs 
  brownish.^ 
  

   Muzzle 
  and 
  top 
  of 
  head 
  orange-buff, 
  an 
  indistinct 
  dark 
  line 
  

   extending 
  from 
  the 
  nose 
  to 
  the 
  forehead. 
  Cheeks 
  and 
  lips 
  

   white, 
  hairs 
  white 
  to 
  roots. 
  Sides 
  of 
  face 
  below 
  eyes 
  buff, 
  

   speckled 
  with 
  black. 
  Ears 
  clothed 
  with 
  short 
  brownish 
  

   hairs. 
  Backs 
  of 
  hands 
  and 
  feet 
  white. 
  Entire 
  under 
  surface 
  

   white 
  ; 
  hairs 
  of 
  belly 
  white 
  to 
  roots. 
  Tail 
  much 
  as 
  in. 
  

   D. 
  harwoodi, 
  rather 
  shorter, 
  but 
  similar 
  in 
  colour. 
  

  

  Skull 
  much 
  smaller 
  than 
  that 
  of 
  D. 
  harwoodi 
  ; 
  with 
  nar- 
  

   rower 
  brain 
  case, 
  shorter 
  nasals, 
  smaller 
  auditory 
  bullae, 
  and 
  

   very 
  much 
  smaller 
  teeth. 
  

  

  Dimensions 
  of 
  the 
  type 
  (measured 
  in 
  the 
  flesh) 
  : 
  — 
  

  

  Head 
  and 
  body 
  67 
  mm. 
  ; 
  tail 
  79 
  ; 
  hind 
  foot 
  20 
  ; 
  ear 
  10. 
  

  

  Skull 
  : 
  greate>t 
  length 
  236 
  ; 
  condylo-incisive 
  length 
  20 
  ; 
  

   zygomatic 
  breadth 
  12"3 
  ; 
  interorbital 
  breadth 
  4'7 
  ; 
  breadth 
  

   of 
  brain-case 
  (across 
  squamosal 
  region) 
  11*2 
  ; 
  length 
  of 
  

   nasals 
  9 
  ; 
  width 
  of 
  palate 
  (inside 
  m 
  r 
  ) 
  2'8 
  ; 
  length 
  of 
  palatal 
  

   foramina 
  4 
  3 
  ; 
  length 
  of 
  upper 
  molar 
  series 
  32. 
  

  

  Hah. 
  Nyama 
  Nyango, 
  Eusso 
  Nyiro. 
  Altitude 
  3200 
  feet. 
  

  

  Type. 
  Old 
  male. 
  Original 
  number 
  1861. 
  Collected 
  on 
  

   February 
  2nd, 
  1911. 
  

  

  This 
  Gerbil 
  is 
  at 
  once 
  distinguishable 
  from 
  the 
  Naivasha 
  

   species, 
  D. 
  harwoodi, 
  by 
  its 
  brighter 
  colour, 
  smaller 
  size, 
  and 
  

   very 
  much 
  smaller 
  teeth. 
  

  

  Taterillus 
  tenebricus, 
  sp. 
  n. 
  

   Allied 
  to 
  T. 
  harringtoni, 
  Thos., 
  but 
  with 
  dorsal 
  surface 
  

  

  