﻿8o 
  Cameron, 
  Hymerioptera 
  Oricntalia. 
  

  

  Chaoilta, 
  gen. 
  iiov. 
  

  

  Head 
  large, 
  nearly 
  as 
  long 
  as 
  broad 
  ; 
  largely 
  developed 
  

   behind 
  the 
  eyes 
  ; 
  the 
  front 
  not 
  depressed 
  ; 
  immediately 
  

   beneath 
  and 
  between 
  the 
  antennae 
  is 
  a 
  large 
  obliquely 
  pro- 
  

   jecting, 
  somewhat 
  semicircular, 
  plate 
  with 
  raised 
  margins 
  ; 
  

   between 
  the 
  antennas, 
  and 
  extending 
  half 
  way 
  into 
  the 
  

   middle 
  of 
  the 
  projection, 
  where 
  it 
  is 
  obliquely 
  narrowed, 
  is 
  a 
  

   large 
  flattened 
  plate. 
  Prothorax 
  above 
  bilobate, 
  the 
  basal 
  

   lobe 
  the 
  larger, 
  and 
  roundly 
  and 
  deeply 
  incised 
  in 
  the 
  

   middle. 
  Petiole 
  broad 
  ; 
  the 
  sides 
  depressed 
  ; 
  the 
  second 
  

   segment 
  is 
  triangularly 
  keeled 
  down 
  the 
  middle 
  at 
  the 
  

   base 
  ; 
  on 
  the 
  sides 
  of 
  the 
  second 
  and 
  third 
  segments 
  at 
  

   the 
  base 
  are 
  oblique 
  depressions 
  ; 
  the 
  securiform 
  articula- 
  

   tion 
  is 
  very 
  deep 
  in 
  the 
  middle, 
  where 
  it 
  is 
  longitudinally 
  

   striated. 
  The 
  prosternum 
  is 
  widely 
  and 
  deeply 
  furrowed, 
  

   the 
  furrow 
  triangularly 
  widened 
  at 
  the 
  apex 
  ; 
  the 
  meso- 
  

   sternum 
  is 
  more 
  narrowly 
  furrowed. 
  The 
  second 
  cubital 
  

   cellule 
  is 
  large, 
  as 
  long 
  as 
  the 
  third, 
  and 
  twice 
  the 
  length 
  

   of 
  the 
  first 
  ; 
  the 
  recurrent 
  nervure 
  is 
  received 
  shortly 
  in 
  

   front 
  of 
  the 
  first 
  transverse 
  cubital 
  ; 
  the 
  probrachial 
  nervure 
  

   is 
  interstitial. 
  The 
  antennae 
  originate 
  from 
  stout 
  tuber- 
  

   cles; 
  the 
  scape 
  stout, 
  dilated 
  before 
  the 
  apex 
  into 
  a 
  tooth; 
  

   the 
  third 
  joint 
  is 
  slightly 
  larger 
  than 
  the 
  fourth. 
  Mandi- 
  

   bles 
  thick, 
  with 
  one 
  blunt 
  tooth 
  at 
  the 
  apex. 
  Eyes 
  small, 
  

   oval, 
  placed 
  on 
  the 
  top 
  of 
  the 
  head 
  and 
  widely 
  separated 
  

   from 
  the 
  base 
  of 
  the 
  mandibles. 
  Legs 
  short 
  and 
  thick; 
  

   the 
  hinder 
  coxae 
  large, 
  broad 
  ; 
  the 
  hinder 
  femora 
  not 
  much 
  

   more 
  than 
  one 
  half 
  of 
  the 
  length 
  of 
  the 
  tibiaj. 
  

  

  The 
  oblique 
  depressions 
  on 
  the 
  abdomen 
  would 
  refer 
  

   this 
  species 
  to 
  Foerster's 
  genus 
  Ipiaulax. 
  The 
  head 
  is 
  much 
  

   larger 
  and 
  more 
  cubital 
  than 
  usual. 
  The 
  plate 
  and 
  keel 
  

   on 
  the 
  front 
  are 
  very 
  noteworthy, 
  although 
  we 
  find 
  a 
  spine 
  

   there 
  in 
  some 
  neotropical 
  species, 
  e.g., 
  in 
  Ipiaulax 
  nign'aps 
  

   Brullc. 
  

  

  