﻿144 
  CAMERON, 
  Hymenoptera 
  Orientalia. 
  

  

  LYTARMES, 
  gen. 
  nov. 
  

  

  Mesonotum 
  transversely 
  striated, 
  trilobate, 
  the 
  middle 
  

   lobe 
  only 
  distinct 
  in 
  front. 
  Clypeus 
  separated 
  from 
  the 
  

   face, 
  its 
  sides 
  at 
  the 
  base 
  depressed. 
  Mandibles 
  short, 
  

   thick, 
  bidentate 
  at 
  the 
  apex. 
  The 
  head 
  not 
  much 
  dilated 
  

   behind 
  the 
  eyes. 
  Areolet 
  appendiculate, 
  the 
  appendicle 
  

   as 
  long 
  as, 
  or 
  shorter 
  than, 
  the 
  cellule 
  itself 
  ; 
  the 
  latter 
  is 
  

   rounded 
  at 
  the 
  top. 
  The 
  transverse 
  median 
  nervure 
  is 
  

   received 
  in 
  front 
  of 
  the 
  transverse 
  basal. 
  The 
  recurrent 
  

   nervure 
  is 
  received 
  near 
  the 
  base 
  of 
  the 
  areolet. 
  The 
  

   radial 
  cellule 
  elongate, 
  lanceolate 
  at 
  the 
  base 
  and 
  apex. 
  

   Scutellum 
  flat; 
  the 
  median 
  segment 
  has 
  a 
  gradual 
  slope 
  

   to 
  the 
  apex; 
  the 
  spiracles 
  are 
  large, 
  elongate, 
  rounded 
  at 
  

   the 
  base 
  and 
  apex. 
  Abdomen 
  without 
  depressions, 
  

   smooth 
  ; 
  the 
  petiole 
  shorter 
  than 
  the 
  second 
  segment 
  ; 
  the 
  

   spiracles 
  are 
  oval, 
  oblique, 
  and 
  are 
  placed 
  near 
  the 
  

   base. 
  Legs 
  stout 
  ; 
  the 
  hinder 
  coxa 
  large, 
  of 
  equal 
  width, 
  

   not 
  swollen; 
  the 
  tarsi 
  spinose; 
  the 
  claws 
  simple; 
  the 
  

   hinder 
  tibiae 
  and 
  tarsi 
  subequal. 
  The 
  intermediate 
  abdo- 
  

   minal 
  segments 
  are 
  not 
  longer 
  than 
  their 
  breadth 
  ; 
  the 
  

   segments 
  are 
  aciculate 
  and 
  not 
  emarginate 
  or 
  grooved 
  at 
  

   the 
  apex 
  ; 
  in 
  the 
  6 
  they 
  are 
  convex 
  above. 
  The 
  meta- 
  

   is 
  shorter 
  than 
  the 
  meso-thorax. 
  The 
  last 
  joint 
  of 
  the 
  hinder 
  

   tarsi 
  is 
  about 
  three 
  times 
  as 
  long 
  as 
  the 
  penultimate. 
  

  

  The 
  first 
  recurrent 
  nervure 
  is 
  received 
  shortly 
  before 
  

   the 
  middle 
  of 
  the 
  cellule; 
  there 
  is 
  a 
  short 
  nervure 
  on 
  the 
  

   cubital 
  nervure, 
  before 
  the 
  areolet, 
  as 
  in 
  IcJineunion. 
  Except 
  

   in 
  the 
  form 
  of 
  the 
  abdomen 
  the 
  3 
  does 
  not 
  differ 
  from 
  the 
  <?. 
  

  

  This 
  genus 
  has 
  the 
  striated 
  mesonotum 
  of 
  R/ij'ssa, 
  but 
  

   differs 
  from 
  it 
  in 
  the 
  appendiculated 
  areolet 
  and 
  in 
  the 
  

   abdominal 
  segments 
  being 
  not 
  distinctly 
  longer 
  than 
  their 
  

   breadth, 
  in 
  the 
  shorter 
  hinder 
  tarsi 
  compared 
  with 
  the 
  

   tibiae, 
  in 
  the 
  much 
  shorter 
  hinder 
  coxae, 
  and 
  in 
  the 
  head 
  

   being 
  less 
  developed 
  behind 
  the 
  eyes. 
  

  

  