﻿330 
  JAMES 
  WATERSTON. 
  

  

  occurring 
  in 
  the 
  States. 
  From 
  the 
  West 
  Indies 
  are 
  recorded 
  C. 
  albipes, 
  Ashm. 
  (Journ.. 
  

   Linn. 
  Soc. 
  Lond. 
  Zool., 
  xxv, 
  p. 
  177, 
  1894), 
  C. 
  auriceps, 
  Ashm. 
  (I.e.), 
  C. 
  leucopus, 
  Ashm, 
  

   (I.e.) 
  and 
  Schmiedeknecht 
  adds 
  C. 
  (Berostenus) 
  rotundus, 
  Ashm. 
  (I.e., 
  p. 
  174). 
  

  

  From 
  an 
  examination 
  of 
  the 
  types 
  or 
  co-types 
  of 
  these 
  West 
  Indian 
  species, 
  I 
  have 
  

   doubts 
  whether 
  any 
  should 
  be 
  included 
  in 
  Westwood's 
  genus. 
  On 
  the 
  other 
  hand 
  

   Necremnus 
  purpureus, 
  Howard 
  (Journ. 
  Linn. 
  Soc. 
  Lond. 
  Zool., 
  xxvi, 
  p. 
  164, 
  1896), 
  

   is, 
  so 
  far 
  as 
  one 
  can 
  judge, 
  a 
  true 
  and 
  very 
  distinct 
  species 
  of 
  Closterocerus 
  . 
  Unfor- 
  

   tunately, 
  the 
  unique 
  type 
  is 
  headless. 
  

  

  Two 
  South 
  American 
  forms 
  have 
  also 
  been 
  included 
  here, 
  viz., 
  Entedon 
  xenodice, 
  

   Walk. 
  (Ann. 
  Mag. 
  Nat. 
  Hist., 
  x, 
  p. 
  273, 
  1843) 
  and 
  E. 
  pelor, 
  Walk, 
  (Ann. 
  Mag. 
  Nat', 
  

   Hist., 
  xi, 
  p. 
  185, 
  1843), 
  both 
  Chilian 
  species, 
  with 
  long-fringed 
  and 
  slightly 
  clouded 
  

   wings. 
  The 
  propodaeum 
  of 
  these 
  insects, 
  however, 
  has 
  two 
  delicate 
  divergent 
  central 
  

   keels 
  and 
  the 
  structure 
  of 
  the 
  thorax 
  appears 
  to 
  be 
  different 
  from 
  that 
  of 
  Closterocerus. 
  

  

  Two 
  examples 
  of 
  a 
  Closterocerus 
  apparently 
  new 
  and 
  conspecific 
  are 
  included 
  in 
  

   Mr. 
  Rutherford's 
  gatherings. 
  Neither 
  is, 
  unfortunately, 
  in 
  very 
  good 
  condition, 
  

   but 
  it 
  has 
  been 
  possible 
  to 
  draw 
  up 
  a 
  fairly 
  complete 
  account 
  from 
  one 
  or 
  other 
  

   of 
  the 
  specimens 
  of 
  the 
  species 
  described 
  below. 
  

  

  C. 
  insignis, 
  sp. 
  nov., 
  comes 
  very 
  near 
  to 
  the 
  genotype 
  C. 
  trifasciatus, 
  Westw., 
  but 
  

   differs 
  in 
  size, 
  being 
  only 
  two-thirds 
  as 
  long. 
  In 
  C. 
  trifasciatus 
  the 
  metanotum 
  is 
  

   concolorous 
  with 
  the 
  scutellum 
  and 
  distinctly, 
  though 
  finely, 
  punctate. 
  In 
  C. 
  insignis 
  

   the 
  metanotum 
  is 
  concolorous 
  with 
  the 
  propodaeum, 
  shining 
  and 
  appearing 
  as 
  a 
  

   gleaming 
  edge 
  to 
  the 
  scutellum. 
  In 
  the 
  new 
  form 
  also 
  the 
  mid 
  tibiae 
  seem 
  lighter 
  

   in 
  colour 
  and 
  the 
  fringe 
  to 
  the 
  fore 
  wings 
  relatively 
  longer. 
  The 
  antennae 
  also 
  show 
  

   important 
  differences, 
  those 
  of 
  C. 
  insignis 
  being 
  relatively 
  broader 
  and 
  natter, 
  with 
  

   the 
  first 
  three 
  funicular 
  joints 
  sub-equal 
  and 
  the 
  fourth 
  hardly 
  narrower 
  than 
  the 
  

   third 
  ; 
  while 
  in 
  C. 
  trifasciatus 
  the 
  second 
  funicular 
  joint 
  is 
  distinctly 
  greatest, 
  the 
  

   fourth 
  diminishing 
  rather 
  suddenly 
  as 
  compared 
  with 
  the 
  third. 
  In 
  C. 
  insignis 
  the 
  

   ring 
  joint 
  is 
  extremely 
  minute 
  (-025 
  mm. 
  broad 
  ; 
  distinctly 
  visible 
  only 
  under 
  

   obj. 
  T 
  V 
  X 
  ocular 
  iii, 
  Zeiss), 
  and 
  the 
  edge 
  is 
  barely 
  above 
  the 
  rim 
  of 
  the 
  pocket 
  in 
  

   the 
  pedicel 
  in 
  which 
  it 
  is 
  accommodated. 
  

  

  The 
  species 
  may 
  be 
  shortly 
  diagnosed 
  as 
  of 
  moderate 
  size, 
  the 
  head 
  and 
  thorax 
  

   brilliant 
  dark 
  green, 
  the 
  parapsides 
  bluer, 
  the 
  remainder 
  of 
  the 
  body 
  dark 
  purple 
  

   violaceous. 
  Wings 
  trifasciate, 
  the 
  basal 
  band 
  indistinct, 
  the 
  median 
  broad, 
  and 
  the 
  

   terminal 
  narrow. 
  Marginal 
  vein 
  very 
  long. 
  All 
  the 
  hind 
  legs, 
  except 
  the 
  last 
  three 
  

   tarsal 
  joints, 
  dark. 
  

  

  Closterocerus 
  insignis, 
  sp. 
  nov. 
  (fig. 
  3). 
  

  

  $. 
  — 
  Head 
  very 
  wide 
  and 
  narrow 
  on 
  the 
  vertex. 
  Eyes 
  quite 
  bare, 
  occiput 
  reticulate, 
  

   brilliant 
  blue-green, 
  rather 
  dark 
  ; 
  vertex 
  and 
  frons 
  (fig. 
  3, 
  c) 
  to 
  level 
  of 
  scrobes 
  

   reticulate, 
  rich 
  dark 
  blue 
  in 
  colour 
  near 
  eye 
  margins, 
  with 
  a 
  greenish 
  lustre 
  round 
  

   the 
  smooth 
  ocellar 
  triangle 
  ; 
  scrobes 
  oval, 
  with 
  a 
  longitudinally 
  striated 
  triangular 
  

   sclerite 
  bearing 
  two 
  bristles 
  between. 
  Above 
  the 
  mouth 
  the 
  violet-coloured 
  

   clypeus 
  is 
  so 
  faintly 
  reticulate 
  as 
  to 
  be 
  practically 
  smooth. 
  Mandibles 
  (fig. 
  3, 
  b) 
  

   bidentate* 
  and 
  of 
  normal 
  shape; 
  inner 
  tooth 
  larger, 
  its 
  inner 
  edge 
  once 
  slightly 
  

  

  * 
  Girault 
  describes 
  the 
  Australian 
  forms 
  as 
  tridentate. 
  

  

  