﻿60 
  Eev. 
  T. 
  A. 
  Marshall's 
  Monograph 
  of 
  

  

  or 
  less 
  confluent. 
  Female 
  not 
  known. 
  Length, 
  If 
  ; 
  wings, 
  

   3f 
  lines. 
  

  

  Var. 
  1. 
  The 
  colours 
  given 
  above 
  are 
  those 
  of 
  HaHday's 
  speci- 
  

   men, 
  discovered 
  by 
  Walker 
  in 
  the 
  I. 
  of 
  Wight. 
  A 
  $■ 
  which 
  I 
  took 
  

   in 
  Epping 
  Forest 
  differs 
  somewhat 
  : 
  — 
  Head 
  black 
  ; 
  mesothorax 
  

   dark 
  piceous, 
  rufescent 
  in 
  the 
  middle 
  ; 
  scutellum 
  and 
  metathorax 
  

   piceo-rufous 
  ; 
  this 
  is 
  the 
  specimen 
  copied 
  in 
  the 
  plate. 
  

  

  This 
  species, 
  if 
  I 
  am 
  not 
  mistaken, 
  has 
  been 
  also 
  

   found 
  at 
  Shiere 
  by 
  Dr. 
  Capron 
  ; 
  it 
  is 
  apparently 
  rare 
  

   everywhere, 
  and 
  has 
  never 
  been 
  observed 
  on 
  the 
  Con- 
  

   tinent. 
  

  

  4. 
  Diachasma 
  rugosa, 
  Wesm. 
  

   Opius 
  rugosus, 
  Wesm., 
  Nouv. 
  Mem. 
  Ac. 
  Brux., 
  1838, 
  

   p. 
  147, 
  ? 
  . 
  

  

  $ 
  . 
  Variable 
  ; 
  head 
  rufous 
  ; 
  the 
  rest 
  of 
  the 
  body 
  ochreous, 
  

   more 
  or 
  less 
  obscure, 
  and 
  sometimes 
  quite 
  black 
  &\)0\e. 
  ; 
  form 
  

   robust. 
  Upper 
  part 
  of 
  face 
  carinated 
  ; 
  cljpeus 
  not 
  quite 
  touching 
  

   the 
  mandibles, 
  its 
  margin 
  straight 
  ; 
  stemmaticum 
  and 
  tips 
  of 
  

   mandibles 
  black. 
  Antennae 
  longer 
  than 
  the 
  body, 
  slender, 
  filiform, 
  

   33-jointed, 
  black; 
  scape 
  more 
  or 
  less 
  rufous. 
  Mesothoracic 
  sutm'es 
  

   deeply 
  impressed, 
  punctulate, 
  efi'aced 
  posteriorly. 
  No 
  punctiform 
  

   impression 
  before 
  the 
  scutellum. 
  A 
  coarsely 
  punctured 
  space 
  on 
  

   the 
  mesopleurse 
  instead 
  of 
  the 
  usual 
  furrow. 
  Mesothorax 
  coarsely 
  

   rugose, 
  subcarinate 
  in 
  the 
  middle. 
  Wings 
  hyaline 
  ; 
  squamula 
  

   ochreous 
  ; 
  nervures 
  and 
  stigma 
  fuscous 
  ; 
  the 
  latter 
  oval, 
  acumi- 
  

   nate, 
  emitting 
  the 
  radius 
  a 
  little 
  before 
  the 
  middle 
  ; 
  1st 
  abscissa 
  

   very 
  short 
  ; 
  2d 
  as 
  long 
  as 
  the 
  1st 
  intercubital 
  nervure, 
  or 
  even 
  a 
  

   little 
  longer 
  ; 
  3d 
  straight, 
  almost 
  attaining 
  the 
  extremity 
  of 
  the 
  

   wing 
  ; 
  recurrent 
  nervm-e 
  evected. 
  Hind 
  wings 
  with 
  no 
  trace 
  of 
  a 
  

   pobrachial 
  transverse 
  nervure. 
  Legs 
  stout, 
  ochreous 
  ; 
  tips 
  of 
  tarsi 
  

   infuscated. 
  Abdomen 
  short, 
  oval, 
  not 
  longer 
  and 
  hardly 
  wider 
  

   than 
  the 
  thorax; 
  1st 
  segment 
  as 
  broad 
  as 
  long, 
  somewhat 
  widened 
  

   behind, 
  deeply 
  and 
  longitudinally 
  striated, 
  with 
  raised 
  lateral 
  

   margins 
  and 
  a 
  medial 
  carina 
  ; 
  fifom 
  the 
  base 
  of 
  the 
  2d 
  segment 
  the 
  

   abdomen 
  is 
  widened 
  and 
  rounded 
  at 
  the 
  sides 
  to 
  the 
  end 
  of 
  the 
  3d 
  

   segment, 
  whence 
  it 
  diminishes 
  rapidly 
  to 
  the 
  anus 
  ; 
  2d 
  segment 
  

   deeply 
  striated 
  like 
  the 
  1st; 
  3d 
  segment 
  more 
  finely 
  striated, 
  its 
  

   apical 
  margin 
  and 
  the 
  rest 
  of 
  the 
  abdomen 
  smooth 
  and 
  shining, 
  

   Terebra 
  as 
  long 
  as 
  \ 
  or 
  \ 
  of 
  the 
  abdomen. 
  Male 
  unknown. 
  

   Length 
  1^ 
  ; 
  wings 
  nearly 
  4 
  lines. 
  

  

  Wesmael's 
  description 
  was 
  made 
  from 
  a 
  specimen 
  

   apparently 
  female, 
  with 
  the 
  antennae 
  and 
  terebra 
  broken, 
  

  

  