﻿1902.] 
  Catalogue 
  of 
  the 
  Coleoptera 
  of 
  South 
  Africa. 
  797 
  

  

  between 
  the 
  two 
  costules, 
  which 
  are 
  very 
  distinct, 
  and 
  the 
  punctures 
  

   bear 
  each 
  a 
  minute 
  sub-flavescent 
  scale 
  ; 
  the 
  pygidium 
  and 
  also 
  the 
  

   propygidium 
  have 
  small, 
  ovate, 
  flavescent 
  scales 
  either 
  partly 
  rubbed 
  

   off 
  or 
  very 
  scattered 
  ; 
  in 
  the 
  male 
  the 
  trochanters 
  project 
  as 
  a 
  small 
  

   but 
  distinct 
  spine, 
  the 
  robust 
  hind 
  tibiae 
  have 
  a 
  short, 
  sharp 
  spine 
  in 
  

   the 
  inner 
  part 
  of 
  the 
  knee, 
  the 
  hind 
  tibiae 
  are 
  emarginate 
  near 
  the 
  

   knee, 
  compressed 
  and 
  gradually 
  dilated 
  underneath 
  into 
  a 
  laminate 
  

   sub-elongato-quadrate 
  process, 
  the 
  lower 
  edge 
  of 
  which 
  is 
  quadri- 
  

   dentate, 
  the 
  fourth 
  tooth 
  forming 
  a 
  sort 
  of 
  apical 
  mucro, 
  the 
  basal 
  

   part 
  of 
  the 
  tibia 
  is 
  grooved 
  underneath, 
  and 
  there 
  is 
  no 
  apical 
  spur 
  ; 
  

   the 
  joints 
  of 
  the 
  hind 
  tarsi 
  are 
  conical, 
  somewhat 
  short, 
  but 
  not 
  

   closely 
  set, 
  the 
  fourth 
  joint 
  is 
  simple 
  underneath, 
  and 
  the 
  hind 
  claw 
  

   is 
  double, 
  the 
  shorter 
  one 
  being 
  alone 
  cleft. 
  

  

  Length 
  5J-7 
  mm. 
  ; 
  width 
  3J-3|- 
  mm. 
  

  

  Hab. 
  Transvaal 
  (Johannesburg). 
  

  

  BIZANUS, 
  n. 
  gen. 
  

  

  Mentum 
  long, 
  very 
  narrow 
  but 
  slightly 
  expanding 
  at 
  the 
  apex 
  

   where 
  it 
  is 
  somewhat 
  rounded 
  and 
  sub-penicillate 
  ; 
  lobe 
  of 
  maxillae 
  

   short, 
  narrow, 
  simple, 
  but 
  having 
  at 
  the 
  tip 
  a 
  pencil 
  of 
  hairs 
  longer 
  

   than 
  the 
  whole 
  maxilla; 
  apical 
  joint 
  of 
  labial 
  palpi 
  more 
  than 
  twice 
  

   as 
  long 
  as 
  the 
  other 
  two 
  taken 
  together, 
  that 
  of 
  the 
  maxillary 
  also 
  

   long, 
  straight 
  inwardly 
  but 
  fusiform 
  outwardly; 
  antennae 
  normal; 
  

   clypeus 
  narrower 
  than 
  the 
  head, 
  nearly 
  parabolic 
  and 
  with 
  the 
  apical 
  

   margin 
  reflexed 
  ; 
  prothorax, 
  scutellum, 
  elytra 
  and 
  pygidium 
  as 
  in 
  

   Heterochelus 
  ; 
  in 
  the 
  male, 
  however, 
  the 
  claw 
  of 
  the 
  intermediate 
  

   legs 
  has 
  alongside 
  of 
  it 
  another 
  one 
  equally 
  robust 
  but 
  shorter, 
  and 
  

   pointing 
  downwards 
  as 
  in 
  some 
  species 
  of 
  Dicranocnemus, 
  Monochelus, 
  

   &c, 
  but 
  instead 
  of 
  being 
  a 
  part 
  of 
  the 
  claw 
  it 
  projects 
  laterally 
  from 
  

   the 
  base 
  itself 
  ; 
  the 
  female 
  has 
  also 
  this 
  claw, 
  but 
  it 
  is 
  somewhat 
  

   rudimentary 
  ; 
  in 
  the 
  male 
  the 
  hind 
  legs 
  are 
  very 
  robust. 
  

  

  This 
  genus 
  differs 
  from 
  Heterochelus 
  by 
  the 
  rounded 
  shape 
  of 
  the 
  

   clypeus, 
  and 
  the 
  absence 
  of 
  teeth 
  on 
  the 
  maxillary 
  lobe 
  ; 
  from 
  

   Diaplochelus, 
  in 
  which 
  the 
  clypeus 
  is 
  nearly 
  similar, 
  it 
  differs 
  by 
  

   the 
  absence 
  of 
  teeth 
  on 
  the 
  maxillary 
  lobe, 
  and 
  also 
  in 
  the 
  general 
  

   facies, 
  which 
  is 
  that 
  of 
  an 
  Heterochelus. 
  

  

  Bizanus 
  caliginosus, 
  n. 
  spec. 
  

  

  Male 
  : 
  Black, 
  with 
  the 
  fore 
  legs 
  rufescent, 
  the 
  elytra 
  are 
  chocolate- 
  

   brown 
  and 
  covered 
  with 
  nearly 
  contiguous 
  ashy-grey 
  scales, 
  the 
  

   propygidium 
  and 
  abdomen 
  have 
  deep 
  yellow 
  scales, 
  but 
  the 
  pygidium 
  

   has 
  none 
  ; 
  the 
  head 
  is 
  very 
  rugose, 
  the 
  clypeus 
  is 
  very 
  much 
  rounded 
  

  

  