﻿the 
  Staphylinidse 
  of 
  Japan. 
  263 
  

  

  longer 
  relatively 
  when 
  compared 
  with 
  the 
  fourth. 
  The 
  only 
  

   species, 
  so 
  far 
  as 
  I 
  know, 
  is 
  the 
  following. 
  

  

  Charich 
  irus 
  spectabilis. 
  

  

  Lithoeharis 
  spectabilis, 
  Kr. 
  Arch. 
  f. 
  Naturg. 
  xxv. 
  p. 
  134. 
  

  

  This 
  may 
  perhaps 
  have 
  been 
  introduced 
  into 
  Japan, 
  as 
  it 
  

   is 
  apparently 
  rare 
  there, 
  though 
  widely 
  distributed 
  in 
  the 
  

   eastern 
  and 
  southern 
  parts 
  of 
  Asia. 
  

  

  ISOCHEILUS, 
  nov. 
  gen. 
  

  

  Labrum 
  fere 
  simplex 
  ; 
  mandibular 
  tridentatse. 
  Caput 
  collo 
  mcdio- 
  

   criter 
  angusto. 
  Tarsi 
  anteriores 
  leviter 
  dilatati, 
  posteriores 
  arti- 
  

   culis 
  quatuor 
  basalibus 
  gradatim 
  decrescentibus. 
  Prosternum 
  

   processu 
  supracoxali 
  brevi. 
  

  

  This 
  genus 
  undoubtedly 
  comes 
  very 
  close 
  to 
  the 
  New- 
  

   World 
  Aderocharis, 
  and 
  its 
  unique 
  species 
  has 
  cpiite 
  the 
  

   appearance 
  of 
  the 
  genus 
  last 
  named; 
  nevertheless 
  I 
  think 
  

   the 
  two 
  are 
  better 
  separated. 
  The 
  labrum 
  in 
  Isocheilus 
  when 
  

   mounted 
  in 
  balsam 
  is 
  seen 
  to 
  be 
  divided 
  nearly 
  to 
  the 
  base 
  by 
  

   a 
  deep 
  abrupt 
  excision, 
  which, 
  however, 
  is 
  filled 
  up 
  by 
  a 
  

   horny 
  process, 
  the 
  front 
  margin 
  of 
  which 
  does 
  not 
  extend 
  

   quite 
  so 
  far 
  forward 
  as 
  the 
  lateral 
  portions, 
  whereas 
  in 
  

   Aderocharis 
  the 
  excision 
  is 
  much 
  narrower 
  and 
  the 
  front 
  of 
  

   the 
  labrum 
  is 
  most 
  prominent 
  in 
  the 
  middle, 
  being 
  in 
  fact 
  

   distinctly 
  dentate. 
  Each 
  mandible 
  in 
  Isocheilus 
  is 
  tridentate, 
  

   while 
  in 
  Aderocharis 
  the 
  right 
  mandible 
  is 
  quadridentate. 
  

   The 
  very 
  short 
  prosternal 
  process 
  is 
  one 
  of 
  the 
  most 
  important 
  

   characters 
  of 
  Isocheilus. 
  The 
  genus 
  at 
  present 
  has 
  only 
  one 
  

   species, 
  viz. 
  : 
  — 
  

  

  Isocheilus 
  s 
  taphy 
  I 
  in 
  o 
  ides. 
  

  

  Lithoeharis 
  staphylinoides, 
  Kr. 
  Arch. 
  f. 
  Naturg. 
  xxv. 
  p. 
  135. 
  

  

  Not 
  uncommon 
  in 
  Japan. 
  I 
  have 
  not 
  seen 
  specimens 
  from 
  

   Ceylon, 
  the 
  locality 
  of 
  the 
  examples 
  described 
  by 
  Kraatz. 
  

  

  Thinocharis 
  basicorn 
  is. 
  

   Scopceus 
  basicomis, 
  Sharp, 
  Trans. 
  Ent. 
  Soc. 
  Lond. 
  1874, 
  p. 
  63. 
  

  

  This 
  minute 
  insect 
  is 
  perhaps 
  not 
  rare, 
  though 
  its 
  small 
  

   size 
  will 
  probably 
  render 
  its 
  capture 
  somewhat 
  unfrequent. 
  

   Mr. 
  Lewis 
  has 
  brought 
  back 
  only 
  three 
  or 
  four 
  examples. 
  It 
  

   is 
  probably 
  a 
  Thinocharis, 
  though 
  this 
  is 
  by 
  no 
  means 
  cer- 
  

  

  