﻿1902.] 
  Catalogue 
  of 
  the 
  Coleoptera 
  of 
  South 
  Africa. 
  709 
  

  

  anterior 
  and 
  intermediate 
  legs 
  are 
  double 
  and 
  each 
  one 
  equally 
  

   deeply 
  cleft." 
  

  

  Gen. 
  HETEEOCHELUS, 
  Burm., 
  

  

  Handb. 
  d. 
  Entomol., 
  iv., 
  1, 
  p. 
  87. 
  

  

  Ischnochelus 
  t 
  Burm., 
  loc. 
  cit., 
  p. 
  129. 
  

  

  Mentum 
  and 
  palpi 
  as 
  in 
  Dichelus 
  ; 
  lobe 
  of 
  maxillae 
  strongly 
  dentate 
  

   inwardly 
  and 
  having 
  at 
  the 
  tip 
  a 
  small 
  pencil 
  of 
  hairs 
  which 
  is 
  often 
  

   wanting, 
  or 
  is 
  quite 
  rudimentary, 
  the 
  number 
  of 
  teeth 
  varies 
  from 
  

   seven 
  to 
  five, 
  if 
  the 
  lobe 
  is 
  concave 
  the 
  teeth 
  are 
  strong, 
  set 
  opposite 
  

   each 
  other 
  (D. 
  sulphureus, 
  elegans, 
  &c), 
  if 
  the 
  lobe 
  is 
  not 
  concave 
  the 
  

   number 
  of 
  teeth 
  is 
  reduced 
  to 
  five, 
  set 
  in 
  a 
  line 
  (coccineus, 
  dissidens, 
  

   &c), 
  but 
  in 
  a 
  few 
  cases 
  the 
  lobe, 
  although 
  not 
  concave, 
  has 
  seven 
  ; 
  the 
  

   clypeus, 
  which 
  is 
  slightly 
  attenuate 
  laterally, 
  assumes 
  three 
  shapes 
  : 
  

   it 
  is 
  straight 
  transversely 
  at 
  apex 
  with 
  the 
  margin 
  • 
  reflexed, 
  and 
  is 
  

   more 
  or 
  less 
  plainly 
  quadri-dentate, 
  and 
  slightly 
  angular 
  laterally 
  at 
  

   the 
  base 
  (except 
  in 
  H. 
  egenus), 
  or 
  more 
  distinctly 
  narrowed 
  laterally 
  

   and 
  tri-dentate, 
  in 
  which 
  case 
  the 
  lateral 
  basal 
  angle 
  is 
  more 
  dis- 
  

   tinctly 
  toothed, 
  or 
  again 
  bi-dentate, 
  but 
  then 
  the 
  lateral 
  angle 
  has 
  

   become 
  as 
  conspicuous 
  a 
  tooth 
  as 
  the 
  median 
  one, 
  which, 
  however, 
  

   projects 
  much 
  more 
  (H. 
  dissidens, 
  vittiger, 
  controversies) 
  ; 
  the 
  pro- 
  

   thorax 
  is 
  similar 
  to 
  that 
  of 
  Dichelus, 
  and 
  not 
  always 
  grooved 
  

   longitudinally 
  in 
  the 
  posterior 
  half, 
  it 
  is, 
  like 
  the 
  head, 
  very 
  scabrose 
  

   or 
  scabroso-punctate, 
  and 
  never 
  glabrous 
  ; 
  the 
  scutellum 
  is 
  of 
  moderate 
  

   size, 
  sub-ogival 
  but 
  rounded 
  at 
  the 
  tip 
  ; 
  the 
  elytra 
  are 
  slightly 
  convex 
  

   or 
  nearly 
  plane, 
  covered 
  entirely 
  with 
  round 
  or 
  elongate 
  scales, 
  or 
  

   with 
  appressed 
  hairs, 
  or 
  they 
  have 
  bands 
  of 
  scales, 
  deeply 
  and 
  

   irregularly 
  punctured 
  and 
  always 
  more 
  rugose 
  on 
  the 
  sides, 
  costulate, 
  

   or 
  having 
  on 
  each 
  side 
  two 
  longitudinal 
  impressions 
  generally 
  filled 
  

   with 
  scales 
  or 
  a 
  very 
  short 
  erect 
  pubescence, 
  laterally 
  they 
  are 
  

   distinctly 
  narrowed 
  towards 
  the 
  apex 
  from 
  under 
  the 
  humeral 
  part, 
  

   and 
  the 
  sides 
  of 
  the 
  dorsal 
  abdominal 
  segments 
  are 
  sometimes 
  broadly 
  

   uncovered 
  ; 
  the 
  propygidium 
  is 
  always 
  partly 
  uncovered 
  and 
  usually 
  

   fringed 
  or 
  banded 
  with 
  scales 
  or 
  squamose 
  hairs 
  similar 
  to 
  those 
  

   clothing 
  entirely 
  the 
  abdomen, 
  or 
  edging 
  the 
  ventral 
  segments 
  ; 
  the 
  

   pygidium 
  in 
  the 
  male 
  is 
  usually 
  plane, 
  and 
  declivous 
  or 
  sloping 
  

   forwards 
  in 
  most 
  of 
  the 
  species, 
  but 
  it 
  is 
  sometimes 
  convex 
  at 
  the 
  

   base 
  (gonager), 
  or 
  very 
  convex 
  {preopygus), 
  or 
  can 
  project 
  in 
  an 
  ovate 
  

   form 
  (pygidialis), 
  and 
  is 
  either 
  tomentose, 
  covered 
  with 
  scales, 
  

   glabrous, 
  or 
  pubescent 
  ; 
  in 
  the 
  female 
  it 
  is 
  sub-horizontal 
  ; 
  the 
  meta- 
  

   sternum 
  is 
  very 
  large, 
  scaly 
  or 
  tomentose, 
  and 
  the 
  abdomen 
  is 
  very 
  

   compressed 
  laterally 
  in 
  the 
  male, 
  and 
  owing 
  to 
  the 
  great 
  development 
  

  

  