﻿244 
  Mr. 
  0. 
  Thomas 
  on 
  Tree-Shrews. 
  

  

  olive-grey, 
  tlie 
  posterior 
  back, 
  as 
  in 
  true 
  helangeri^ 
  with 
  a 
  

   fulvous 
  suffusion. 
  Shoulder-streaks 
  unusually 
  white, 
  sharply 
  

   defined, 
  aiul 
  cons])icuous. 
  Under 
  surface 
  white, 
  with 
  scarcely 
  

   a 
  tinge 
  of 
  bnffy, 
  the 
  hairs 
  white 
  to 
  tlieir 
  roots 
  ; 
  inner 
  a-^pect 
  

   of 
  limbs 
  white, 
  not 
  grey-mixed, 
  the 
  inner 
  side 
  of 
  the 
  hind 
  legs 
  

   particularly 
  strongly 
  contrasted 
  and 
  markedly 
  different 
  from 
  

   what 
  is 
  found 
  in 
  the 
  other 
  subspecies. 
  

  

  Skull 
  with 
  the 
  bullae 
  rather 
  larger 
  than 
  in 
  other 
  subspecies. 
  

  

  Dimensions 
  of 
  type 
  given 
  on 
  p. 
  66 
  of 
  Dr. 
  Lyon's 
  

   Monograph. 
  

  

  Hob. 
  Zibugaung, 
  Lower 
  Chindwin. 
  

  

  Tyije. 
  Male. 
  B.M. 
  no. 
  6. 
  7. 
  5. 
  1. 
  Collected 
  15th 
  January, 
  

   iy06, 
  and 
  presented 
  by 
  Capt. 
  A. 
  Mears. 
  

  

  This 
  form 
  is 
  readily 
  distinguishable 
  by 
  its 
  conspicuous 
  

   white 
  shoulder-stripe, 
  chest, 
  and 
  inner 
  side 
  of 
  hind 
  limbs. 
  

  

  Passing 
  eastwards 
  again 
  from 
  the 
  region 
  inhabited 
  by 
  

   beIo7igeri 
  and 
  chinensis, 
  we 
  find 
  the 
  Tree-Slirews 
  becoming- 
  

   darker 
  and 
  more 
  rufous, 
  two 
  series 
  — 
  from 
  Mongtse, 
  Yunnan, 
  

   and 
  Nan, 
  Siam, 
  respectivelj- 
  — 
  being 
  both 
  distinguished 
  from 
  

   the 
  more 
  western 
  forms 
  in 
  this 
  way. 
  But 
  they 
  also 
  differ 
  

   from 
  each 
  other 
  in 
  various 
  nays, 
  and 
  I 
  therefore 
  base 
  on 
  

   them 
  the 
  two 
  following 
  new 
  subspecies 
  : 
  — 
  

  

  Tapaia 
  helangeri 
  yunalis, 
  subsp. 
  n. 
  

  

  Colour 
  much 
  darker 
  than 
  in 
  helangeri 
  and 
  chinensifi, 
  the 
  

   back 
  more 
  rufous, 
  the 
  rump 
  more 
  blackish 
  grey, 
  therefore 
  in 
  

   direct 
  contrast 
  to 
  belartgeri, 
  in 
  which 
  the 
  rump 
  is 
  more 
  rufous 
  

   than 
  the 
  back. 
  General 
  tone 
  near 
  " 
  mummy-brown," 
  but 
  

   there 
  is 
  a 
  variation 
  towards 
  the 
  olive-grey 
  of 
  chinensis. 
  

   Rump 
  distinctly 
  darker 
  than 
  back. 
  Under 
  surface 
  grey, 
  

   washed 
  with 
  whitish, 
  though 
  in 
  some 
  cases 
  the 
  whitish 
  goes 
  

   to 
  the 
  root 
  of 
  the 
  hairs 
  ; 
  but 
  tiiere 
  is 
  never 
  the 
  distinctly 
  

   contrasted 
  white 
  of 
  subsp. 
  siccata. 
  Shoulder-stripes 
  incon- 
  

   spicuous, 
  dull 
  whitish. 
  

  

  Measurements 
  on 
  p. 
  GG 
  of 
  Dr. 
  Lyon's 
  ))aper. 
  

  

  Ilah. 
  S.E. 
  Yunnan. 
  Type 
  from 
  J\long-tsze. 
  

  

  Tyi^e. 
  Adult 
  female. 
  B.M. 
  no. 
  12. 
  7. 
  2,5. 
  45. 
  Collected 
  

   lOih 
  July, 
  1910, 
  by 
  H. 
  Orii. 
  Seven 
  specimens. 
  

  

  Tupaia 
  helangeri 
  laotum, 
  subsp. 
  n. 
  

  

  General 
  colour 
  rufous 
  brown 
  (^'Brussels 
  brown," 
  Ilidg- 
  

   way), 
  the 
  rump 
  blackish 
  grey 
  — 
  therefore, 
  again, 
  in 
  contrast 
  

   to 
  true 
  helangeri, 
  in 
  which 
  the 
  fore-back 
  is 
  grey 
  and 
  the 
  hind- 
  

   back 
  rufous. 
  As 
  compared 
  with 
  yunalis 
  the 
  colour 
  is 
  

  

  