﻿utT. 
  14 
  THE 
  BEETLE 
  FAMILY 
  PSEUDOMORPHIDAE 
  NOTMAN 
  6 
  

  

  Dytiscidae. 
  In 
  Adelotopus, 
  also, 
  many 
  of 
  the 
  species 
  are 
  varie- 
  

   gated 
  with 
  maculae 
  or 
  fasciae 
  of 
  red. 
  

  

  The 
  genus 
  Hydro 
  poromorpha 
  is 
  known 
  from 
  Africa. 
  Paussotro- 
  

   pus 
  1 
  and 
  Cryptocephalomorpha 
  from 
  the 
  East 
  Indies. 
  Pseudo- 
  

   morpha 
  is 
  also 
  known 
  from 
  Australia. 
  

  

  Paussotropus 
  in 
  addition 
  to 
  characters 
  mentioned 
  in 
  the 
  synopsis 
  

   is 
  distinguished 
  lyy 
  very 
  short 
  tarsi 
  and 
  the 
  absence 
  of 
  a 
  posterior 
  

   prolongation 
  of 
  the 
  presternum. 
  

  

  The 
  habits 
  of 
  the 
  Pseudomorphidae 
  are 
  not 
  well 
  known. 
  Many 
  of 
  

   the 
  Australian 
  species 
  are 
  found 
  under 
  the 
  bark 
  of 
  Eucalyptus 
  trees. 
  

   Adelotopus 
  has 
  been 
  found 
  with 
  ants 
  and 
  is 
  believed 
  by 
  Sloane 
  to 
  

   feed 
  on 
  them. 
  2 
  Some 
  species, 
  probably 
  of 
  Sphallomorpha, 
  have 
  been 
  

   found 
  on 
  flowers 
  and 
  doubtless 
  lead 
  to 
  their 
  association 
  with 
  the 
  

   Lebias. 
  

  

  Though 
  not 
  closely 
  related 
  to 
  the 
  subject 
  of 
  this 
  paper, 
  it 
  may 
  not 
  

   be 
  out 
  of 
  place 
  in 
  connection 
  with 
  a 
  suggested 
  rearrangement 
  of 
  the 
  

   Adephaga, 
  to 
  call 
  attention 
  to 
  the 
  structure 
  of 
  the 
  mouth 
  in 
  Pasi- 
  

   maclius. 
  The 
  suture 
  between 
  the 
  mentuni 
  and 
  the 
  submentum 
  is 
  

   very 
  strongly 
  developed 
  and 
  the 
  maxillary 
  fissure 
  is 
  much 
  reduced. 
  

   Elsewhere 
  in 
  the 
  Carabidae, 
  even 
  in 
  the 
  Scaritini, 
  where 
  Pasimachus 
  

   is 
  placed 
  by 
  the 
  systematists, 
  the 
  fissure 
  extends 
  some 
  distance 
  behind 
  

   the 
  mentum 
  with 
  a 
  distinct 
  apical 
  arcuation 
  inward, 
  forming 
  a 
  dis- 
  

   tinct 
  submentum. 
  but 
  in 
  Paximaclius 
  the 
  .fissure 
  ends 
  at 
  the 
  base 
  of 
  

   the 
  mentum. 
  In 
  reality 
  it 
  reaches 
  the 
  base 
  of 
  the 
  mentum 
  only 
  as 
  a 
  

   suture, 
  for 
  the 
  basal 
  half 
  of 
  the 
  mentum 
  is 
  continuous 
  with 
  the 
  gena 
  

   and 
  the 
  fissure 
  is 
  open 
  only 
  for 
  the 
  apical 
  half. 
  Throughout 
  the 
  

   Carabidae. 
  to 
  the 
  extent 
  of 
  the 
  author's 
  observations, 
  the 
  fissure 
  is 
  

   open 
  downwards, 
  so 
  that 
  considerable 
  vertical 
  motion 
  is 
  possible 
  in 
  

   the 
  movement 
  of 
  the 
  maxilla. 
  In 
  Pasimachus 
  the 
  mentum 
  conceals 
  

   the 
  fissure 
  from 
  beneath 
  and 
  motion 
  in 
  the 
  fissure 
  must 
  be 
  altogether 
  

   horizontal. 
  These 
  peculiarities 
  of 
  mouth 
  structure, 
  together 
  with 
  

   the 
  large 
  mandibles 
  and 
  the 
  posterior 
  position 
  of 
  the 
  eyes, 
  seem 
  to 
  

   afford 
  strong 
  grounds 
  for 
  erecting 
  a 
  distinct 
  family 
  for 
  this 
  and 
  

   allied 
  genera. 
  

  

  In 
  closing 
  this 
  brief 
  discussion 
  of 
  the 
  Pseudomorphidae, 
  one 
  

   further 
  point 
  may 
  be 
  indicated. 
  The 
  mandibles 
  are 
  without 
  visible 
  

   scrobes. 
  Dissection 
  shows 
  that 
  this 
  is 
  due 
  to 
  the 
  greater 
  development 
  

   of 
  the 
  lower 
  edge 
  of 
  the 
  mandibles; 
  a 
  structure 
  corresponding 
  to 
  

   the 
  upper 
  edge 
  of 
  the 
  scrobe, 
  appearing 
  as 
  an 
  arcuate 
  carina 
  on 
  the 
  

   upper 
  surface. 
  This 
  recalls 
  the 
  expansion 
  of 
  the 
  lower 
  edge 
  of 
  

   the 
  scrobe 
  in 
  the 
  Carabid 
  genus 
  Leistus. 
  Whether 
  the 
  absence 
  of 
  

   the 
  scrobe 
  in 
  the 
  two 
  Lebiid 
  genera 
  Pentagoiiica 
  and 
  Onota 
  is 
  due 
  to 
  

  

  1 
  See 
  footnote 
  4 
  on 
  p. 
  5. 
  

  

  2 
  Arthur 
  M. 
  Lea. 
  Australian 
  and 
  Tasmanian 
  Coleoptera 
  inhabiting 
  or 
  resorting 
  to 
  

   the 
  Nests 
  of 
  Ants, 
  Bees, 
  and 
  Termites. 
  Proc. 
  Roy. 
  Soe. 
  Victoria, 
  n. 
  s. 
  vol. 
  23, 
  1911, 
  

   pp. 
  116-230. 
  

  

  