﻿698 
  Transactions 
  South 
  African 
  Philosophical 
  Society, 
  [vol. 
  xii. 
  

  

  A 
  1 
  . 
  Clypeus 
  parabolic. 
  

  

  Body 
  elongate, 
  elytra 
  very 
  little 
  sinuate 
  laterally, 
  claws 
  of 
  the 
  

  

  intermediate 
  legs 
  simple 
  underneath 
  in 
  the 
  male 
  Diaplochelus. 
  

  

  Body 
  not 
  elongate, 
  elytra 
  strongly 
  sinuate 
  laterally, 
  claw 
  of 
  

   the 
  intermediate 
  legs 
  with 
  a 
  robust 
  sub-lateral 
  tooth 
  in 
  the 
  

   male 
  Bizanus. 
  

  

  Gen. 
  DICHELUS, 
  Serv., 
  

  

  Encyclop. 
  Meth., 
  x., 
  1825, 
  p. 
  373. 
  

  

  Guer., 
  Iconogr. 
  d. 
  Kegn. 
  Anim. 
  Insect., 
  pi. 
  xxv., 
  figs. 
  8, 
  8a, 
  8b. 
  

  

  Mentum 
  elongate, 
  a 
  little 
  ampliated 
  laterally 
  at 
  a 
  short 
  distance 
  

   from 
  the 
  base, 
  or 
  occasionally 
  towards 
  the 
  median 
  part, 
  not 
  deeply 
  

   constricted 
  towards 
  the 
  apex, 
  but 
  more 
  or 
  less 
  deeply 
  emarginated 
  

   there 
  at 
  the 
  point 
  of 
  insertion 
  of 
  the 
  labial 
  palpi, 
  apical 
  part 
  trans- 
  

   verse 
  with 
  the 
  angles 
  sharp 
  and 
  penicillate, 
  but 
  occasionally 
  only 
  

   with 
  a 
  few 
  hairs 
  ; 
  upper 
  lobe 
  of 
  maxillae 
  strongly 
  dentate 
  inwardly 
  

   and 
  penicillate 
  or 
  not 
  at 
  the 
  tip, 
  the 
  number 
  of 
  the 
  sharp 
  hooked 
  

   teeth 
  is 
  five 
  (D. 
  villosus) 
  or 
  four, 
  but 
  with 
  the 
  basal 
  one 
  bifid 
  

   (clentipes), 
  or 
  three 
  (laticollis, 
  &c.) 
  ; 
  last 
  joint 
  of 
  labial 
  and 
  maxillary 
  

   palpi 
  more 
  or 
  less 
  strongly 
  fusiform 
  and 
  truncate 
  at 
  the 
  tip 
  ; 
  clypeus 
  

   sub-parallel, 
  truncate, 
  and 
  straight 
  at 
  apex, 
  but 
  with 
  the 
  angles 
  

   sharply 
  dentate 
  and 
  reflexed, 
  and 
  with 
  two 
  smaller 
  teeth 
  in 
  the 
  

   middle 
  ; 
  the 
  clypeus 
  is 
  separated 
  from 
  the 
  head 
  by 
  an 
  impressed, 
  

   transverse 
  line, 
  and 
  is 
  angular 
  laterally 
  at 
  the 
  base 
  ; 
  antennae 
  nine- 
  

   jointed, 
  club 
  nearly 
  as 
  long 
  as 
  all 
  the 
  four 
  preceding 
  joints 
  taken 
  

   together 
  ; 
  prothorax 
  attenuate 
  sub-obliquely 
  laterally 
  from 
  the 
  

   median 
  to 
  the 
  apical 
  part, 
  not 
  very 
  convex, 
  sulcate 
  in 
  the 
  middle 
  

   only 
  towards 
  the 
  basal 
  part 
  ; 
  scutellum 
  sub-ogival, 
  rounded 
  at 
  tip 
  ; 
  

   elytra 
  ampliate 
  laterally 
  at 
  the 
  humeral 
  part, 
  more 
  or 
  less 
  deeply 
  

   sinuate 
  laterally, 
  distinctly 
  narrowed 
  from 
  below 
  the 
  humeral 
  part 
  

   towards 
  the 
  apex 
  where 
  they 
  leave 
  the 
  greatest 
  part 
  of 
  the 
  pro- 
  

   pygidium 
  exposed, 
  as 
  well 
  as 
  the 
  edge 
  of 
  the 
  dorsal 
  part 
  of 
  the 
  

   abdominal 
  segments 
  ; 
  pygidium 
  declivous 
  and 
  sloping 
  forward 
  in 
  

   the 
  male, 
  sub-horizontal 
  in 
  the 
  female, 
  abdomen 
  strongly 
  com- 
  

   pressed 
  laterally 
  in 
  the 
  male, 
  but 
  much 
  less 
  so 
  in 
  the 
  female 
  ; 
  

   metasternum 
  very 
  broad 
  ; 
  hind 
  legs 
  of 
  the 
  male 
  very 
  strongly 
  

   developed, 
  hind 
  coxae 
  almost 
  transverse, 
  with 
  the 
  hind 
  margin 
  

   sharply 
  carinate 
  and 
  angular, 
  and 
  when 
  the 
  femora 
  are 
  greatly 
  

   developed 
  projecting 
  much 
  beyond 
  the 
  abdominal 
  segments 
  ; 
  

   anterior 
  tibiae 
  with 
  three 
  outer 
  teeth 
  curving 
  slightly 
  downwards, 
  

   nearly 
  connate 
  at 
  the 
  base 
  ; 
  the 
  two 
  basal 
  ones 
  are 
  set 
  at 
  right 
  

  

  

  