﻿2 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  67 
  

  

  especially 
  in 
  Pseudomorpha, 
  the 
  posterior 
  extremity 
  of 
  the 
  fissure 
  

   is 
  acute 
  as 
  though 
  obliquely 
  truncated 
  by 
  the 
  antennal 
  groove, 
  

   whereas 
  in 
  Adelotopus 
  the 
  antennal 
  groove 
  and 
  the 
  fissure 
  are 
  par- 
  

   allel 
  and 
  both 
  are 
  semicircularly 
  rounded 
  at 
  their 
  posterior 
  extremi- 
  

   ties. 
  The 
  form 
  of 
  the 
  fissure 
  is 
  very 
  similar 
  in 
  Dytiscus. 
  Also, 
  in 
  

   the 
  latter 
  genus, 
  there 
  is 
  a 
  distinct 
  excavation 
  between 
  the 
  eye 
  and 
  

   the 
  fissure. 
  The 
  Dytiscidae 
  in 
  general 
  have 
  a 
  tendency 
  to 
  hold 
  the 
  

   antennae 
  in 
  repose, 
  against 
  the 
  underside 
  of 
  the 
  head. 
  

  

  In 
  the 
  Carabidae 
  the 
  relation 
  between 
  the 
  eye 
  and 
  the 
  fissure 
  

   varies 
  considerably. 
  In 
  the 
  Lebiid 
  genus 
  Agra, 
  the 
  eye 
  is 
  wholly 
  

   posterior 
  to 
  the 
  latter, 
  whereas 
  in 
  Anisodactylus 
  the 
  fissure 
  extends 
  

   to 
  about 
  the 
  posterior 
  two-thirds 
  of 
  the 
  eye. 
  This 
  relation 
  is 
  

   probably 
  correlated 
  with 
  the 
  feeding 
  habits 
  of 
  the 
  beetles. 
  The 
  

   fissure 
  is 
  apparently 
  always 
  rounded 
  at 
  its 
  posterior 
  extremity. 
  

  

  In 
  Silphomorpha, 
  Sphallomorpha, 
  and 
  Pseudomorpha 
  the 
  an- 
  

   tennae 
  are 
  long 
  and 
  filiform 
  as 
  in 
  the 
  other 
  families 
  of 
  the 
  Adeph- 
  

   aga; 
  whereas 
  in 
  Adelotopus, 
  they 
  are 
  very 
  short 
  and 
  strongly 
  fusi- 
  

   form, 
  much 
  more 
  clavate 
  than 
  in 
  many 
  genera 
  of 
  the 
  clavicorn 
  

   family 
  Staphylinidae. 
  Other 
  indications 
  of 
  association 
  with 
  that 
  

   family 
  are 
  not 
  lacking. 
  The 
  genera 
  Silphomorpha 
  and 
  Sphallo- 
  

   morpha 
  were 
  separated 
  by 
  Westwood 
  and 
  later 
  made 
  synonymous. 
  

   They 
  seem 
  to 
  the 
  author, 
  however, 
  to 
  be 
  worthy 
  of 
  maintenance. 
  

   Westwood 
  distinguished 
  them 
  by 
  the 
  presence 
  of 
  a 
  broad, 
  rather 
  

   indistinct 
  tooth 
  in 
  the 
  species 
  assembled 
  in 
  Silphomorpha. 
  In 
  addi- 
  

   tion, 
  these 
  species 
  are 
  characterized 
  by 
  a 
  more 
  or 
  less 
  distinct 
  angu- 
  

   lation 
  of 
  the 
  gular 
  sutures. 
  Variability 
  in 
  the 
  form 
  of 
  the 
  gular 
  

   sutures 
  is 
  frequent 
  in 
  the 
  Staphylinidae. 
  especially 
  in 
  the 
  Lathrobia, 
  

   but, 
  as 
  far 
  as 
  the 
  author 
  is 
  aware, 
  is 
  unknown 
  in 
  the 
  Carabidae. 
  

   The 
  Cryptobia, 
  also, 
  are 
  recalled 
  in 
  the 
  densely 
  pubescent 
  spots 
  

   found 
  on 
  two 
  of 
  the 
  abdominal 
  segments 
  in 
  the 
  males 
  of 
  Pseudo- 
  

   morpha. 
  

  

  The 
  species 
  of 
  Silphomorpha 
  are 
  all 
  uniform 
  in 
  coloration 
  — 
  

   dark 
  piceous 
  to 
  nearly 
  black. 
  The 
  sjoecies 
  of 
  Sphallomorpha 
  are 
  

   variegated 
  with 
  pale 
  maculae, 
  vittae, 
  or 
  margins. 
  

  

  In 
  Pseudomorpha, 
  the 
  only 
  genus 
  known 
  from 
  the 
  western 
  hemi- 
  

   sphere, 
  the 
  form 
  is 
  elongate, 
  parallel 
  or 
  nearly 
  so 
  and 
  moderately 
  

   convex, 
  and 
  the 
  color 
  varies 
  from 
  castaneous 
  to 
  nearly 
  black. 
  

  

  The 
  legs 
  are 
  very 
  short, 
  with 
  strongly 
  developed 
  femora 
  in 
  all 
  

   the 
  genera 
  of 
  the 
  family. 
  

  

  In 
  the 
  Australian 
  genera 
  Adelotopus, 
  Cainogenion, 
  Silphomorpha, 
  

   and 
  Sphallomorpha, 
  the 
  form 
  is 
  more 
  variable. 
  Many 
  species 
  of 
  

   Adelotop'us 
  are 
  very 
  elongate 
  and 
  cylindrical, 
  resembling 
  the 
  bark 
  

   beetles 
  of 
  the 
  family 
  Scolytidae. 
  In 
  Sphallomorpha 
  the 
  form 
  is 
  

   broad, 
  oval, 
  and 
  depressed 
  like 
  that 
  of 
  the 
  Gyrinidae 
  and 
  the 
  

  

  