﻿325 
  

  

  NEW 
  SPECIES 
  OF 
  CHALCIDOIDEA 
  FROM 
  CEYLON. 
  

  

  By 
  James 
  Waterston, 
  B.D., 
  B.Sc, 
  

   Imperial 
  Bureau 
  of 
  Entomology, 
  London. 
  

  

  All 
  the 
  species 
  described 
  in 
  this 
  paper 
  were 
  obtained 
  at 
  Peradeniya, 
  Ceylon, 
  by 
  

   Mr. 
  A. 
  Rutherford, 
  the 
  Government 
  Entomologist, 
  and 
  were 
  forwarded 
  by 
  him 
  to 
  

   the 
  Imperial 
  Bureau 
  of 
  Entomology 
  for 
  identification. 
  In 
  every 
  case 
  the 
  types 
  

   are 
  deposited 
  in 
  the 
  British 
  Museum. 
  

  

  Genus 
  Polycystus, 
  Westwood. 
  

  

  Polycystus 
  propinquus, 
  sp. 
  nov. 
  

  

  Very 
  near 
  to 
  P. 
  luteipes, 
  How. 
  (Journ. 
  Linn. 
  Soc. 
  Lond., 
  Zool., 
  xxvi, 
  p. 
  142, 
  1896), 
  

   from 
  which, 
  however, 
  it 
  differs 
  as 
  detailed 
  below, 
  in 
  its 
  slightly 
  smaller 
  size, 
  

   puncturation 
  and 
  antennal 
  structure. 
  A 
  bronzy 
  green 
  species 
  with 
  entirely 
  

   luteous 
  legs. 
  

  

  (J. 
  — 
  Head 
  just 
  wider 
  than 
  the 
  thorax, 
  dark 
  metallic 
  green 
  with 
  cupreous 
  or 
  

   bronzy 
  reflections, 
  surface 
  moderately 
  coarsely 
  punctured. 
  Clypeal 
  edge 
  straight, 
  

   medianly 
  incised, 
  with 
  an 
  inconspicuous 
  tooth 
  on 
  each 
  side 
  of 
  the 
  incision. 
  

  

  Antennae 
  inserted 
  nearly 
  at 
  the 
  base 
  of 
  the 
  eye, 
  with 
  dark 
  base 
  ; 
  scape 
  long, 
  

   slender, 
  entirely 
  pale, 
  reaching 
  to 
  beyond 
  the 
  anterior 
  ocellus 
  ; 
  pedicel 
  longer 
  than 
  

   the 
  ring 
  joints 
  and 
  the 
  first 
  of 
  the 
  funicle 
  together 
  ; 
  two 
  small 
  ring 
  joints, 
  the 
  

   second 
  slightly 
  larger, 
  first 
  joint 
  of 
  funicle 
  shortest, 
  about 
  three-quarters 
  of 
  the 
  

   second 
  ; 
  the 
  six 
  funicular 
  joints 
  are 
  almost 
  transverse 
  and 
  increase 
  gradually 
  in 
  

   breadth 
  so 
  that 
  the 
  club 
  is 
  little 
  wider 
  than 
  the 
  preceding 
  joint. 
  In 
  luteipes 
  the 
  

   joints 
  of 
  the 
  funicle 
  are 
  more 
  cylindrical 
  (one 
  being 
  nearly 
  equal 
  to 
  two) 
  and 
  the 
  

   club 
  broader 
  ; 
  in 
  luteipes 
  the 
  club 
  and 
  two 
  joints 
  before 
  it, 
  in 
  propinquus 
  the 
  club 
  

   alone, 
  are 
  darkened. 
  

  

  Thorax 
  coloured 
  like 
  the 
  head. 
  Puncturation 
  or 
  raised 
  reticulation 
  strong, 
  

   coarser 
  on 
  mid 
  lobe 
  of 
  mesothorax 
  than 
  in 
  luteipes. 
  The 
  parapsidal 
  furrows 
  reach 
  

   the 
  border 
  of 
  the 
  scutellum, 
  but 
  are 
  more 
  delicate 
  posteriorly 
  than 
  in 
  luteipes. 
  

   Suture 
  between 
  pro- 
  and 
  meso-thorax 
  broad 
  and 
  gleaming. 
  Metanotum 
  smooth 
  

   and 
  shining. 
  Propodaeum 
  with 
  a 
  median 
  carina 
  and 
  indistinct 
  lateral 
  folds. 
  

   Spiracle 
  about 
  mid- 
  way 
  on 
  anterior 
  edge 
  between 
  median 
  carina 
  and 
  the 
  fold. 
  

  

  Abdomen 
  : 
  Petiole 
  reticulate, 
  with 
  faint 
  median 
  and 
  lateral 
  carinae 
  ; 
  colour, 
  

   purplish 
  black, 
  dull. 
  Abdominal 
  segments 
  smooth, 
  dark, 
  gleaming, 
  the 
  whole 
  

   triangularly 
  expanded 
  ; 
  second 
  segment 
  largest, 
  the 
  others 
  telescoped. 
  

  

  Legs 
  : 
  Coxae 
  dark, 
  metallic, 
  the 
  fore 
  pair 
  nearly 
  smooth, 
  greenish 
  ; 
  the 
  

   posterior 
  rather 
  purplish 
  and 
  rougher. 
  Mesopleural 
  impression 
  completely 
  and 
  

   coarsely 
  reticulate. 
  Legs 
  entirely 
  pale 
  honey-yellow, 
  except 
  the 
  last 
  tarsal 
  joints 
  

   (fifth) 
  and 
  the 
  claws, 
  which 
  are 
  dark. 
  

  

  Length, 
  \\ 
  mm. 
  ; 
  alar 
  expanse, 
  3Jmm. 
  

  

  Host 
  : 
  the 
  bean 
  fly 
  (Agromyza 
  phaseoli, 
  Coq.). 
  

  

  Described 
  from 
  a 
  single 
  male. 
  

  

  