﻿new 
  and 
  old 
  Buthidse. 
  341 
  

  

  shallow 
  median 
  depression 
  above, 
  a 
  little 
  depressed 
  towards 
  

   its 
  hinder 
  end, 
  and 
  a 
  little 
  constricted 
  at 
  the 
  sides 
  ; 
  dilated 
  

   beyond 
  the 
  constriction 
  into 
  a 
  tridentate 
  lobe 
  ; 
  inferior 
  lateral 
  

   keels 
  becoming 
  gradually 
  more 
  strongly 
  dentate 
  from 
  behind 
  

   forwards. 
  Vesicle^about 
  the 
  same 
  form 
  in 
  proportion 
  to 
  the 
  

   tail 
  as 
  in 
  B. 
  europceus, 
  i. 
  e. 
  it 
  is 
  less 
  globular 
  ; 
  aculeus 
  longer 
  

   than 
  in 
  B. 
  europceus. 
  

  

  Palp 
  very 
  like 
  that 
  of 
  B. 
  europceus 
  ; 
  fingers 
  very 
  slightly 
  

   incurved, 
  nearly 
  straight, 
  the 
  movable 
  without 
  a 
  basal 
  lobe, 
  

   the 
  immovable 
  without 
  an 
  excavation. 
  

  

  Coxce 
  and 
  legs 
  hairy 
  and 
  granular, 
  as 
  in 
  B. 
  europceus. 
  

  

  Pectines 
  with 
  25-26 
  teeth. 
  

  

  Measurements 
  in 
  millimetres. 
  — 
  Total 
  length 
  89 
  ; 
  length 
  of 
  

   cephalothorax 
  9Jr, 
  width 
  11 
  ; 
  length 
  of 
  tail 
  56 
  ; 
  first 
  caudal 
  

   segment, 
  length 
  7, 
  width 
  6, 
  height 
  5^ 
  ; 
  fifth 
  caudal 
  segment, 
  

   length 
  11, 
  width 
  4f, 
  height 
  4; 
  length 
  of 
  vesicle 
  6, 
  width 
  4j, 
  

   height 
  4 
  ; 
  aculeus 
  5 
  J 
  ; 
  length 
  of 
  humerus 
  7f 
  , 
  of 
  brachium 
  9\, 
  

   of 
  il 
  hand-back 
  " 
  6, 
  of 
  hand 
  8, 
  of 
  movable 
  finger 
  10£ 
  ; 
  width 
  

   of 
  hand 
  4, 
  of 
  brachium 
  4. 
  

  

  A 
  single 
  specimen 
  (sex 
  unknown) 
  from 
  Mogador, 
  collected 
  

   and 
  presented 
  to 
  the 
  British 
  Museum 
  by 
  Mr. 
  (3. 
  A. 
  Payton. 
  

  

  It 
  is 
  by 
  the 
  form 
  of 
  the 
  tail 
  alone 
  that 
  this 
  species 
  may 
  be 
  

   recognized 
  from 
  the 
  well-known 
  B. 
  europceus 
  (Linn.). 
  This 
  

   organ 
  is 
  much 
  longer 
  than 
  in 
  the 
  latter 
  species, 
  being 
  nearly 
  

   six 
  times 
  as 
  long 
  as 
  the 
  cephalothorax 
  ; 
  the 
  inferior 
  keels 
  of 
  

   the 
  second 
  and 
  third 
  segments 
  are 
  uniformly 
  granular, 
  the 
  

   inferior 
  lateral 
  keels 
  of 
  the 
  fifth 
  become 
  gradually 
  dentate 
  

   from 
  before 
  backwards, 
  and 
  the 
  posterior 
  lateral 
  lobe 
  of 
  this 
  

   segment 
  is 
  tridentate 
  : 
  the 
  vesicle 
  too 
  is 
  less 
  globular, 
  the 
  

   aculeus 
  longer 
  and 
  less 
  curved. 
  

  

  Butlius 
  Phillipsii, 
  sp. 
  n. 
  (PI. 
  XV. 
  fig. 
  6.) 
  

  

  Colour 
  very 
  variable 
  ; 
  appendages 
  and 
  tail 
  ochraceous 
  or 
  

   testaceous 
  ; 
  hand 
  of 
  palp 
  darker, 
  with 
  obscure 
  paler 
  longitu- 
  

   dinal 
  bands 
  ; 
  tergites 
  paler 
  behind, 
  darker 
  in 
  front 
  ; 
  cephalo- 
  

   thorax 
  fuscous 
  to 
  testaceous. 
  Eyes, 
  anterior 
  and 
  posterior 
  

   keels 
  of 
  the 
  cephalothorax, 
  keels 
  of 
  the 
  tergites, 
  and 
  those 
  of 
  

   the 
  hinder 
  end 
  of 
  the 
  under 
  surface 
  of 
  the 
  tail 
  may 
  be 
  black 
  

   or 
  almost 
  the 
  colour 
  of 
  the 
  rest 
  of 
  the 
  plates, 
  and 
  there 
  may 
  

   be 
  an 
  additional 
  black 
  patch 
  at 
  the 
  sides 
  of 
  the 
  cephalothorax 
  

   and 
  of 
  the 
  tergites. 
  

  

  Cephalothorax 
  finely 
  granular 
  all 
  over 
  except 
  between 
  the 
  

   median 
  eyes 
  ; 
  granules 
  between 
  the 
  anterior 
  and 
  posterior 
  

  

  Ann. 
  & 
  Mag. 
  N. 
  Hist, 
  Ser. 
  6. 
  Vol. 
  iii. 
  24 
  

  

  