﻿156 
  Mr. 
  H. 
  E. 
  Andrewes 
  on 
  the 
  

  

  process, 
  and 
  in 
  doing 
  so 
  aroused 
  the 
  ire 
  of 
  Bates 
  (Trans. 
  

   Ent. 
  Soc. 
  1873, 
  271). 
  I 
  regard 
  the 
  genera 
  as 
  distinct, 
  and 
  

   am 
  glad 
  to 
  find 
  that 
  Mr. 
  T. 
  G. 
  Sloane 
  takes 
  the 
  same 
  view 
  : 
  

   I 
  note, 
  too, 
  that 
  Mr. 
  Alluaud 
  (BulL 
  Soc. 
  Ent. 
  Fr. 
  1917, 
  321) 
  

   seems 
  to 
  have 
  come 
  to 
  the 
  same 
  conclusion. 
  The 
  two 
  

   genera 
  have 
  a 
  very 
  different 
  appearance, 
  but 
  the 
  head, 
  the 
  

   mandibles, 
  mentum, 
  palpi, 
  etc., 
  are 
  very 
  similar 
  : 
  on 
  the 
  

   other 
  hand, 
  there 
  is 
  a 
  striking 
  difference 
  in 
  the 
  paraglossae, 
  

   which 
  does 
  not 
  seem 
  hitherto 
  to 
  have 
  attracted 
  attention. 
  

   I 
  give 
  a 
  brief 
  synopsis 
  : 
  — 
  

  

  Dioryche. 
  Ligula 
  small, 
  bisetose, 
  surrounded 
  by 
  the 
  paraglossae, 
  

   which 
  are 
  glabrous 
  and 
  just 
  meet 
  above 
  it, 
  at 
  which 
  point 
  there 
  is 
  

   an 
  indentation, 
  their 
  front 
  margin 
  truncate, 
  the 
  angles 
  romided; 
  

   mentum 
  edentate; 
  penultimate 
  joint 
  of 
  labial 
  palpi 
  plurisetose; 
  

   upper 
  surface 
  brassy 
  in 
  colour, 
  glabrous, 
  elytra 
  with 
  seriate 
  punctures 
  

   on 
  one 
  or 
  more 
  of 
  the 
  odd 
  intervals 
  ; 
  upper 
  surface 
  of 
  tarsi 
  glabrous. 
  

  

  Platymetopus. 
  Ligula, 
  mentum, 
  and 
  labial 
  palpi 
  as 
  in 
  Dioryche. 
  

   paraglossae 
  with 
  more 
  rounded 
  sides, 
  from 
  which 
  ^iroject 
  on 
  each 
  

   side 
  6 
  or 
  8 
  stiff 
  bristles; 
  upper 
  surface 
  very 
  dark, 
  densely 
  pilose, 
  

   elytral 
  intervals 
  without 
  seriate 
  punctures; 
  upper 
  surface 
  of 
  tarsi 
  

   pilose. 
  

  

  Among 
  the 
  species 
  originally 
  included 
  by 
  Dejean 
  in 
  the 
  

   genus 
  Platymetopus, 
  there 
  is 
  only 
  one 
  (P. 
  amoenus) 
  which 
  

   belongs 
  to 
  Dioryche. 
  

  

  25. 
  Hyphaereon 
  reflexus. 
  Hope 
  figures 
  this 
  species 
  (Col. 
  

   Man. 
  ii, 
  1838, 
  t. 
  2, 
  f. 
  5), 
  but 
  I 
  can 
  find 
  no 
  further 
  references 
  

   to 
  either 
  genus 
  or 
  species. 
  

  

  Macleay's 
  account 
  of 
  his 
  genus 
  is 
  incomplete, 
  and 
  I 
  

   therefore 
  give 
  a 
  few 
  further 
  details, 
  though 
  I 
  have 
  not 
  

   been 
  able 
  to 
  dissect 
  the 
  mouth-parts 
  as 
  I 
  should 
  hke 
  to 
  

   have 
  done. 
  

  

  Ligula 
  of 
  medium 
  length, 
  a 
  little 
  widened 
  at 
  apex, 
  bisetose; 
  

   paraglossae 
  narrow, 
  divergent, 
  a 
  httle 
  longer 
  than 
  ligula, 
  which 
  is 
  

   free 
  at 
  apex; 
  last 
  joint 
  of 
  maxillary 
  palpi 
  tapering, 
  romided 
  at 
  

   apex, 
  second 
  and 
  fourth 
  joints 
  equal, 
  third 
  a 
  little 
  shorter; 
  last 
  

   joint 
  of 
  labial 
  palpi 
  a 
  Uttle 
  shorter 
  than 
  penultimate, 
  which 
  is 
  pluri- 
  

   setose 
  ; 
  mentum 
  with 
  a 
  short 
  rounded 
  tooth 
  (not 
  acute, 
  as 
  in 
  both 
  

   description 
  and 
  illustration), 
  at 
  base 
  of 
  which 
  are 
  two 
  setae 
  ; 
  maxillae 
  

   curved 
  and 
  sharply 
  pointed, 
  with 
  a 
  row 
  of 
  dense 
  hairs 
  on 
  irmer 
  

   margin; 
  mandibles 
  long, 
  curved, 
  and 
  pointed. 
  

  

  Hyphaereon 
  reflexus, 
  $. 
  Length 
  7 
  mill, 
  Width 
  ; 
  head 
  

   1-3, 
  prothorajc 
  2'0, 
  elytra, 
  3-0 
  mill 
  

  

  