﻿628 
  Transactions 
  South 
  African 
  Philosophical 
  Society, 
  [vol. 
  xii. 
  

  

  British 
  Bechuanaland. 
  This 
  is 
  the 
  widest 
  range 
  known 
  of 
  any 
  of 
  

   the 
  South 
  African 
  Hopliin^e. 
  

  

  If 
  we 
  follow 
  the 
  30th 
  parallel 
  and 
  compare 
  the 
  Hopliin^ 
  found 
  

   in 
  the 
  west 
  with 
  those 
  met 
  with 
  in 
  the 
  east 
  we 
  are 
  immediately 
  

   struck 
  by 
  the 
  absence 
  of 
  Pachycnemini, 
  except 
  Eriesthis, 
  the 
  paucity 
  

   of 
  Heterochclidcs 
  , 
  and 
  the 
  great 
  number 
  of 
  Scelophy 
  sides 
  represented 
  

   by 
  the 
  species 
  of 
  the 
  genus 
  Monochelus. 
  Not 
  that 
  the 
  latter 
  genus 
  

   is 
  not 
  represented 
  in 
  the 
  west, 
  but 
  the 
  number 
  of 
  the 
  western 
  

   species 
  is 
  less, 
  and 
  their 
  facies 
  is 
  different. 
  This 
  also 
  holds 
  good 
  

   in 
  the 
  Transvaal, 
  where, 
  however, 
  the 
  species, 
  with 
  a 
  few 
  excep- 
  

   tions, 
  are 
  the 
  same 
  as 
  those 
  found 
  in 
  Natal, 
  but, 
  I 
  am 
  told, 
  in 
  smaller 
  

   numbers. 
  One 
  genus 
  with 
  only 
  one 
  species 
  (Outeniqua 
  /estiva) 
  is 
  

   the 
  only 
  Scelophysid 
  known 
  to 
  occur 
  in 
  Mashunaland. 
  It 
  seems, 
  

   however, 
  to 
  have 
  a 
  wide 
  range, 
  for 
  it 
  has 
  been 
  found 
  at 
  Lourenco- 
  

   Marquez, 
  in 
  the 
  Transvaal, 
  and 
  British 
  Bechuanaland. 
  

  

  The 
  species 
  of 
  the 
  group 
  Hoplides 
  seem 
  to 
  be 
  much 
  rarer 
  in 
  the 
  

   western 
  than 
  in 
  the 
  eastern 
  part 
  ; 
  out 
  of 
  12 
  genera 
  and 
  29 
  species 
  

   3 
  genera 
  and 
  7 
  species 
  only 
  are 
  restricted 
  to 
  the 
  south-western 
  

   part 
  of 
  the 
  Cape 
  Colony. 
  

  

  The 
  sexual 
  characters 
  of 
  the 
  male 
  are 
  the 
  only 
  ones 
  which 
  permit 
  

   of 
  the 
  identification 
  of 
  the 
  species, 
  owing 
  to 
  the 
  extraordinary 
  simi- 
  

   larity 
  of 
  the 
  females 
  among 
  themselves 
  in 
  the 
  group 
  Heterochelides 
  

   especially. 
  The 
  shape 
  of 
  the 
  genital 
  armature 
  of 
  the 
  male 
  varies 
  as 
  

   greatly 
  as 
  in 
  other 
  divisions 
  of 
  the 
  Family. 
  I 
  have 
  not, 
  however, 
  

   made 
  use 
  of 
  them 
  because 
  the 
  species 
  can 
  be 
  somewhat 
  easily 
  

   distinguished 
  by 
  other 
  outward 
  characters. 
  As 
  stated 
  before, 
  the 
  

   affinities 
  of 
  the 
  group 
  Hoplides 
  lies 
  with 
  the 
  Madagascar 
  fauna, 
  but 
  

   the 
  Pachycnemini, 
  Heterochelides, 
  and 
  Scelophysides 
  are 
  South 
  

   African. 
  On 
  the 
  West 
  Coast 
  of 
  Africa 
  one 
  species 
  of 
  Pachycnema 
  

   has, 
  however, 
  been 
  described 
  from 
  Angola 
  * 
  as 
  well 
  as 
  one 
  Dichelus 
  

   from 
  Pungo 
  Andongo, 
  and 
  in 
  Eastern 
  Africa 
  one 
  Eriesthis 
  and 
  a 
  

   Dichelus 
  from 
  Tabora, 
  and 
  also 
  one 
  Monochelus 
  from 
  the 
  Ugueno 
  

   Mountains. 
  

  

  Tbibe 
  PACHYCNEMINI. 
  

  

  Key 
  to 
  the 
  Genera. 
  

  

  A3. 
  Hind 
  legs 
  slender, 
  similar 
  in 
  both 
  sexes. 
  

   B 
  2 
  . 
  Mentum 
  very 
  long 
  and 
  narrow. 
  

  

  C 
  2 
  . 
  Scutellum 
  moderately 
  rounded 
  at 
  the 
  apex. 
  

  

  * 
  I 
  have 
  so 
  far 
  seen 
  two 
  species 
  of 
  Pachycnemini 
  from 
  Damaraland. 
  One 
  

   \Peritriehia 
  ditiHsima) 
  differs 
  in 
  colouring 
  from 
  the 
  other 
  species 
  of 
  the 
  genus. 
  

   Boheman 
  records 
  also 
  a 
  species 
  of 
  Heterochilides 
  (Dichelus 
  suspectus) 
  from 
  the 
  

   same 
  part 
  of 
  South 
  Africa. 
  

  

  