﻿738 
  Transactions 
  South 
  African 
  Philosophical 
  Society, 
  [vol. 
  xii. 
  

  

  strongly 
  gibbose 
  at 
  the 
  base 
  and 
  nearly 
  horizontal 
  ; 
  the 
  trochanters 
  

   are 
  not 
  spinose, 
  the 
  hind 
  thighs 
  are 
  swollen 
  and 
  have 
  a 
  short 
  but 
  

   sharp 
  spine 
  underneath 
  at 
  a 
  short 
  distance 
  from 
  the 
  knee, 
  the 
  two 
  

   teeth 
  of 
  which 
  are 
  equal 
  and 
  not 
  very 
  distinct 
  ; 
  the 
  hind 
  tibiae 
  are 
  

   scooped 
  underneath, 
  although 
  not 
  deeply, 
  for 
  half 
  the 
  length, 
  

   carinate 
  from 
  the 
  median 
  part 
  to 
  the 
  apex, 
  but 
  the 
  inner 
  face 
  is 
  a 
  

   little 
  concave, 
  and 
  the 
  upper 
  inner 
  edge 
  has 
  above 
  the 
  mucro, 
  which 
  

   is 
  not 
  greatly 
  developed, 
  a 
  small 
  tooth 
  not 
  projecting 
  further 
  than 
  

   the 
  mucro 
  itself 
  ; 
  no 
  a.pical 
  spur 
  ; 
  hind 
  claws 
  simple, 
  single. 
  

  

  Length 
  4 
  mm. 
  ; 
  width 
  If 
  mm. 
  

  

  Hab. 
  Cape 
  Colony 
  (Graham's 
  Town, 
  Somerset 
  East). 
  

  

  Heterochelus 
  pygidialis, 
  n. 
  spec. 
  

   Male 
  : 
  Black, 
  with 
  the 
  elytra 
  light 
  chocolate-brown, 
  and 
  sprinkled 
  on 
  

   the 
  upper 
  side 
  with 
  small, 
  elongate 
  whitish 
  grey 
  scales 
  which 
  are 
  not 
  

   contiguous 
  but 
  equi-distant 
  and 
  do 
  not 
  hide 
  the 
  colour 
  of 
  the 
  integu- 
  

   ments, 
  while 
  underneath 
  the 
  whole 
  of 
  the 
  abdomen 
  and 
  the 
  pectus 
  

   are 
  covered 
  with 
  contiguous 
  longer 
  scales, 
  the 
  edge 
  of 
  the 
  propygidium 
  

   has 
  a 
  very 
  narrow 
  band 
  of 
  similar 
  scales, 
  but 
  the 
  pygidium 
  is 
  quite 
  

   smooth 
  and 
  impunctate, 
  and 
  projects 
  horizontally 
  in 
  the 
  shape 
  of 
  an 
  

   ovate 
  protuberance 
  as 
  long 
  as 
  the 
  whole 
  of 
  the 
  abdomen 
  ; 
  the 
  head 
  

   and 
  prothorax 
  are 
  scabroso-punctate, 
  especially 
  the 
  former, 
  the 
  

   clypeus 
  of 
  which 
  is 
  slightly 
  emarginate 
  at 
  the 
  tip 
  while 
  the 
  two 
  

   median 
  teeth 
  are 
  almost 
  obliterated, 
  in 
  the 
  median 
  part 
  of 
  the 
  

   prothorax 
  the 
  basal 
  furrow 
  is 
  very 
  distinct, 
  and 
  the 
  anterior 
  and 
  

   lateral 
  margins 
  have 
  a 
  fringe 
  of 
  greyish 
  not 
  dense 
  setae 
  ; 
  scutellum 
  

   somewhat 
  long 
  and 
  as 
  scaly 
  as 
  the 
  elytra 
  ; 
  the 
  latter 
  are 
  not 
  costate, 
  

   but 
  they 
  have 
  two 
  slight 
  longitudinal 
  impressions 
  ; 
  the 
  hind 
  femora 
  

   are 
  moderately 
  robust, 
  simple, 
  without 
  any 
  spine 
  to 
  the 
  trochanters 
  ; 
  

   the 
  hind 
  tibiae 
  are 
  equally 
  convex 
  inwardly 
  and 
  outwardly 
  in 
  the 
  

   basal 
  part, 
  but 
  more 
  compressed 
  inwardly 
  towards 
  the 
  apex, 
  

   sub-carinate 
  underneath 
  and 
  very 
  slightly 
  dentate 
  inwardly 
  at 
  the 
  

   top 
  of 
  the 
  carina, 
  near 
  the 
  knee, 
  the 
  inner 
  apical 
  part 
  is 
  sharply 
  

   angular 
  but 
  not 
  mucronate, 
  and 
  there 
  is 
  no 
  apical 
  spur 
  ; 
  hind 
  claws 
  

   simple, 
  single. 
  

  

  Female 
  unknown. 
  

  

  This 
  species 
  is 
  evidently 
  allied 
  to 
  H. 
  oreopygus 
  ; 
  in 
  which 
  the 
  

   pygidium 
  affects 
  also 
  an 
  ovoid 
  shape, 
  which 
  is, 
  however, 
  restricted 
  

   to 
  the 
  basal 
  part 
  only, 
  whereas 
  in 
  H. 
  pygidialis 
  this 
  development 
  is 
  

   quite 
  symmetrical, 
  and 
  while 
  in 
  the 
  first-named 
  species 
  the 
  pro- 
  

   pygidium 
  is 
  very 
  broad, 
  it 
  is 
  greatly 
  reduced 
  in 
  width 
  in 
  H. 
  pygidialis. 
  

  

  Length 
  5J-5-| 
  mm. 
  ; 
  width 
  2-§— 
  2f 
  mm. 
  

  

  Hab. 
  Cape 
  Colony 
  (Port 
  Elizabeth). 
  

  

  

  