﻿340 
  

  

  JAMES 
  WATERSTON. 
  

  

  6. 
  Two 
  bristles 
  and 
  a 
  clear 
  spot 
  

  

  setigerous) 
  inside 
  furrows. 
  

  

  7. 
  Keel 
  of 
  propodaeum 
  continued 
  through 
  

  

  middle 
  of 
  the 
  metathorax. 
  

  

  Thorax. 
  

   (non- 
  

  

  6. 
  Three 
  bristles 
  along 
  inside 
  of 
  parapsidal 
  

  

  furrows. 
  

  

  7. 
  Metathorax 
  not 
  carinate. 
  

  

  Abdomen. 
  

  

  8. 
  Second 
  segment 
  longer 
  than 
  third. 
  

  

  9. 
  Total 
  length 
  of 
  ovipositor, 
  *26 
  mm. 
  

  

  apical 
  one 
  -third 
  serrate. 
  

  

  8. 
  Second 
  segment 
  subequal 
  to 
  third. 
  

  

  9. 
  Total 
  length 
  of 
  ovipositor, 
  *4 
  mm. 
  

  

  apical 
  one 
  -sixth 
  serrate. 
  

  

  10. 
  

  

  Hind 
  tarsi 
  with 
  joints 
  1 
  and 
  3 
  subequal 
  

   2 
  longer. 
  

  

  Legs. 
  

   10. 
  

  

  Hind 
  tarsi 
  with 
  joint 
  1 
  shorter 
  than 
  2, 
  

   which 
  is 
  equal 
  to 
  3. 
  

  

  Genus 
  Tetrastichodes, 
  Ashm. 
  

  

  The 
  following 
  species 
  is 
  separated 
  from 
  Syntomosphyrum, 
  Forst., 
  mainly 
  by 
  the 
  

   well-marked 
  though 
  fine 
  furrow 
  on 
  the 
  scutellum. 
  The 
  legs 
  of 
  this 
  insect 
  are 
  unusually 
  

   bristly 
  and 
  the 
  first 
  mid 
  tarsal 
  joint 
  long. 
  

  

  Tetrastichodes 
  asthenogmus, 
  sp. 
  nov. 
  (fig. 
  6). 
  

  

  Head 
  a 
  little 
  broader 
  than 
  deep. 
  Eyes 
  seen 
  from 
  in 
  front 
  rather 
  narrow 
  and 
  wide 
  

   apart, 
  the 
  intervening 
  space 
  over 
  twice 
  the 
  visible 
  diameter 
  of 
  the 
  eye. 
  Mouth 
  

   edge 
  straight, 
  transverse, 
  with 
  two 
  inconspicuous 
  central 
  lobes. 
  Scrobes 
  oval, 
  their 
  

   lower 
  edge 
  just 
  on 
  the 
  base 
  line 
  of 
  the 
  eyes. 
  Vertex 
  rather 
  narrow, 
  suture 
  high 
  

   up, 
  so 
  that 
  the 
  anterior 
  ocellus 
  lies 
  within 
  the 
  wide 
  angle 
  formed 
  by 
  the 
  frontal 
  plates 
  ; 
  

   suture 
  between 
  the 
  plates 
  disappearing 
  at 
  the 
  scrobes, 
  between 
  which 
  there 
  is 
  no 
  

   median 
  plate 
  ; 
  a 
  distinct 
  keel 
  from 
  the 
  clypeal 
  corners 
  to 
  the 
  lower 
  edge 
  of 
  the 
  eye. 
  

   On 
  the 
  occiput 
  are 
  numerous 
  short 
  erect 
  hairs 
  ; 
  on 
  the 
  vertex 
  medianly 
  behind 
  the 
  J 
  

  

  Tetrastichodes 
  asthenogmus, 
  sp. 
  n 
  

  

  mandible. 
  

  

  ocelli 
  two 
  short 
  spinose 
  hairs, 
  and 
  a 
  similar 
  pair 
  on 
  each 
  side 
  near 
  the 
  eye 
  margin 
  ; 
  

   from 
  the 
  anterior 
  ocellus 
  to 
  the 
  scrobes 
  is 
  a 
  rather 
  wide, 
  practically 
  bare 
  median 
  

   area 
  ; 
  half-way 
  to 
  the 
  orbits 
  is 
  an 
  irregular 
  row 
  of 
  minute 
  bristles 
  (8-10), 
  and 
  a 
  

   similar 
  row 
  on 
  the 
  orbits 
  themselves 
  ; 
  between 
  the 
  scrobes 
  is 
  a 
  double 
  row 
  (4 
  , 
  4) 
  

   of 
  short 
  stiff 
  bristles, 
  and 
  from 
  this 
  level 
  to 
  the 
  mouth 
  edge 
  are 
  numerous 
  (60-70) 
  

   minute 
  bristles. 
  

  

  Antennae 
  (fig. 
  6, 
  a) 
  in 
  both 
  specimens 
  imperfect, 
  but 
  probably 
  with 
  the 
  following 
  

   joints 
  : 
  scape, 
  pedicel, 
  ring 
  joints, 
  three 
  funicular 
  and 
  three 
  (?) 
  to 
  the 
  club. 
  The 
  

   scape 
  and 
  pedicel 
  are 
  lemon-yellow 
  in 
  colour, 
  the 
  others 
  fuscous. 
  Scape 
  with 
  

  

  