﻿610 
  Mr. 
  G. 
  J. 
  Arrow 
  on 
  a 
  new 
  

  

  Hob. 
  McClintock 
  Range, 
  Kimberley 
  Gold 
  Field, 
  Far 
  North 
  

   of 
  Western 
  Australia. 
  

  

  Type. 
  Adult 
  male. 
  B.M. 
  no. 
  10. 
  12. 
  25. 
  8. 
  Original 
  

   number 
  56. 
  Collected 
  17th 
  July, 
  1909, 
  by 
  J. 
  P. 
  Rogers, 
  

   and 
  presented 
  by 
  the 
  Perth 
  Museum. 
  Male 
  and 
  two 
  females 
  

   examined, 
  the 
  latter 
  retained 
  in 
  the 
  Perth 
  Museum. 
  

  

  This 
  subspecies 
  differs 
  from 
  its 
  nearest 
  ally, 
  M. 
  r. 
  wood- 
  

   ivardi, 
  of 
  the 
  Grant 
  Range, 
  further 
  west, 
  by 
  its 
  longer 
  fur, 
  

   less 
  rufous 
  colour, 
  and 
  the 
  essential 
  identity 
  of 
  the 
  two 
  

   sexes. 
  

  

  LXXII. 
  — 
  Upon 
  the 
  Dynamopina3, 
  a 
  new 
  Subfamily 
  of 
  

   Lamellicorn 
  Beetles. 
  By 
  Gilbert 
  J. 
  Arrow. 
  

  

  (Published 
  by 
  permission 
  of 
  tbe 
  Trustees 
  of 
  the 
  British 
  Museum.) 
  

  

  The 
  preparation 
  of 
  catalogues 
  of 
  the 
  less-known 
  subfamilies 
  

   of 
  Scarabajidse, 
  which 
  I 
  have 
  undertaken 
  for 
  the 
  important 
  

   series 
  now 
  in 
  course 
  of 
  publication, 
  has 
  made 
  it 
  necessary 
  to 
  

   investigate 
  the 
  proper 
  position 
  of 
  various 
  obscure 
  forms. 
  

   Upon 
  one 
  of 
  these, 
  described 
  by 
  Mr. 
  Semenow 
  as 
  Dynamo- 
  

   pus 
  athleta, 
  I 
  included 
  in 
  a 
  recent 
  paper 
  (Ann. 
  & 
  Mag. 
  Nat. 
  

   Hist. 
  1911, 
  vii. 
  p. 
  394) 
  a 
  too-hasty 
  note, 
  based 
  upon 
  dissection 
  

   of 
  one 
  of 
  two 
  specimens 
  sent 
  to 
  me 
  from 
  India 
  for 
  identifica- 
  

   tion. 
  The 
  specimens 
  being 
  in 
  bad 
  condition, 
  I 
  arrived 
  at 
  a 
  

   conclusion 
  which 
  I 
  must 
  now 
  retract. 
  I 
  have 
  since 
  been 
  able 
  

   to 
  make 
  a 
  more 
  satisfactory 
  examination 
  of 
  another 
  species 
  of 
  

   the 
  genus, 
  and 
  have 
  found 
  that 
  Mr. 
  Semenow's 
  supposition 
  

   that 
  the 
  mandibles 
  are 
  concealed 
  within 
  the 
  mouth 
  is 
  quite 
  

   correct 
  and 
  my 
  allocation 
  of 
  this 
  anomalous 
  little 
  insect 
  to 
  

   the 
  Orphninse 
  is 
  not 
  more 
  tenable 
  than 
  his 
  to 
  the 
  Hybosorinse. 
  

   The 
  anterior 
  prominences 
  of 
  the 
  head 
  which 
  I 
  believed 
  to 
  

   represent 
  the 
  mandibles 
  are 
  processes 
  from 
  the 
  genae 
  of 
  an 
  

   altogether 
  unique 
  character, 
  and 
  the 
  actual 
  mandibles, 
  unlike 
  

   those 
  of 
  any 
  genus 
  with 
  which 
  it 
  is 
  possible 
  to 
  compare 
  

   Dynamopus, 
  are 
  very 
  small 
  and 
  completely 
  concealed. 
  

  

  The 
  real 
  position 
  of 
  the 
  genus 
  is 
  much 
  more 
  problematical 
  

   than 
  has 
  been 
  supposed. 
  The 
  most 
  distinctive 
  feature 
  of 
  

   that 
  part 
  of 
  the 
  Scarabaeida3 
  to 
  which 
  it 
  has 
  been 
  assigned 
  

   consists 
  in 
  the 
  correlation 
  of 
  the 
  clypeus 
  with 
  the 
  labrum 
  and 
  

   mandibles, 
  the 
  latter 
  being 
  always 
  horizontally 
  extended 
  

   outside 
  of 
  the 
  mouth-cavity 
  and 
  uncovered, 
  a 
  condition 
  

   entirely 
  different 
  from 
  that 
  found 
  here. 
  

  

  Two 
  years 
  later 
  than 
  Semenow's 
  description, 
  a 
  little 
  beetle 
  

  

  