﻿672 
  Transactions 
  South 
  African 
  Philosophical 
  Society, 
  [vol. 
  xii. 
  

  

  maxillary 
  palpi 
  dilated 
  in 
  the 
  inner 
  side, 
  where 
  it 
  is 
  fusiform, 
  and 
  

   curving 
  slightly 
  inwards 
  on 
  the 
  outer 
  part 
  ; 
  clypeus 
  a 
  little 
  shorter 
  

   than 
  the 
  head, 
  attenuate 
  laterally 
  towards 
  the 
  tip 
  which 
  is 
  truncate, 
  

   and 
  with 
  the 
  angles 
  sharp 
  or 
  reflexed 
  ; 
  prothorax 
  attenuate 
  laterally 
  

   in 
  front, 
  base 
  marginate, 
  somewhat 
  arcuate, 
  basal 
  angles 
  sharp 
  ; 
  

   scutellum 
  triangular, 
  moderately 
  long, 
  or 
  long 
  ; 
  elytra 
  broader 
  than 
  

   the 
  prothorax, 
  attenuate 
  from 
  the 
  base 
  towards 
  the 
  posterior 
  part, 
  

   strongly 
  sinuate 
  laterally, 
  and 
  having 
  a 
  strongly 
  developed 
  callus 
  

   on 
  the 
  humeral 
  part, 
  somewhat 
  plane 
  and 
  having 
  on 
  each 
  side 
  

   three 
  or 
  four 
  shallow 
  longitudinal 
  depressions 
  filled 
  occasionally 
  

   with 
  white 
  or 
  flavescent 
  scales 
  ; 
  pygidium 
  triangular, 
  vertical 
  or 
  

   inclined 
  forwards 
  in 
  the 
  male 
  ; 
  anterior 
  tibiae 
  with 
  a 
  very 
  short 
  

   inner 
  spur 
  which 
  is, 
  however, 
  obliterated 
  in 
  some 
  species, 
  quadri- 
  

   dentate 
  or 
  tri-dentate 
  outwardly, 
  the 
  teeth 
  sometimes 
  connate, 
  inner 
  

   claw 
  of 
  the 
  four 
  anterior 
  tarsi 
  twice 
  as 
  long 
  as 
  the 
  outer, 
  and 
  both 
  of 
  

   them 
  cleft 
  ; 
  posterior 
  femora 
  and 
  tibiae 
  greatly 
  developed, 
  especially 
  

   in 
  the 
  male 
  ; 
  apex 
  of 
  posterior 
  tibiae 
  dilated, 
  semicircular 
  outwardly, 
  

   hollowed 
  and 
  stiffly 
  bristly 
  all 
  round, 
  apical 
  spur 
  of 
  the 
  male 
  strong 
  

   and 
  often 
  displaced 
  or 
  produced 
  into 
  a 
  spine 
  or 
  tooth 
  ; 
  posterior 
  tarsi 
  

   partly 
  or 
  entirely 
  fused 
  and 
  with 
  the 
  fifth 
  joint 
  always 
  longer 
  than 
  

   the 
  first 
  four 
  put 
  together, 
  claw 
  simple, 
  very 
  long, 
  equal 
  in 
  length 
  to 
  

   the 
  apical 
  joint 
  ; 
  abdomen 
  very 
  compressed 
  laterally 
  ; 
  metasternum 
  

   very 
  broad 
  ; 
  trochanters 
  of 
  posterior 
  legs 
  strongly 
  developed 
  and 
  

   occasionally 
  spinose. 
  

  

  The 
  genus 
  can 
  be 
  divided 
  into 
  two 
  groups. 
  

  

  In 
  the 
  first, 
  the 
  posterior 
  legs 
  of 
  the 
  male, 
  especially 
  the 
  femora, 
  

   are 
  very 
  strongly 
  dilated 
  or 
  ampliated, 
  and 
  the 
  joints 
  of 
  the 
  hind 
  

   tarsi 
  are 
  more 
  or 
  less 
  distinctly 
  fused, 
  sometimes 
  even 
  reduced 
  to 
  a 
  

   single 
  one 
  (P. 
  calcaratus).- 
  : 
  ~ 
  The 
  habitat 
  seems 
  to 
  be 
  restricted 
  to 
  the 
  

   South-Western 
  and 
  Western 
  districts 
  of 
  the 
  Cape 
  Colony, 
  where 
  

   rains 
  occur 
  periodically 
  in 
  winter. 
  

  

  In 
  the 
  second, 
  the 
  elytra 
  are 
  more 
  depressed, 
  the 
  posterior 
  tibiae 
  

   in 
  the 
  male 
  are 
  a 
  little 
  thickened, 
  but 
  not 
  inflated, 
  the 
  joints 
  of 
  

   the 
  hind 
  tarsi 
  are 
  normal, 
  and 
  the 
  apical 
  joint 
  of 
  the 
  maxillary 
  palpi 
  is 
  

   cylindrical 
  and 
  curves 
  outwardly 
  from 
  the 
  base 
  to 
  the 
  median 
  part. 
  

  

  Some 
  species 
  of 
  this 
  second 
  group 
  occur 
  in 
  the 
  Eastern 
  Provinces 
  

   of 
  the 
  Cape 
  Colony. 
  

  

  Key 
  to 
  the 
  Species. 
  

  

  A 
  2 
  . 
  Posterior 
  tibiae 
  of 
  males 
  very 
  much 
  ampliated 
  ; 
  joints 
  of 
  tarsi 
  

   short, 
  fused. 
  

  

  B 
  2 
  . 
  Anterior 
  tibiae 
  quadri-dentate 
  outwardly. 
  

  

  * 
  In 
  plate 
  xlii., 
  figures 
  1 
  to 
  22 
  inclusive 
  are 
  those 
  of 
  the 
  outer 
  face 
  of 
  the 
  hind 
  

   leg 
  ; 
  all 
  the 
  others 
  represent 
  the 
  inner 
  face. 
  

  

  