﻿24 
  Eev. 
  T. 
  A. 
  MarBhall's 
  Monograph 
  of 
  

  

  Generally 
  distributed, 
  and 
  common 
  in 
  woods, 
  both 
  in 
  

   England 
  and 
  Ireland. 
  O. 
  levis 
  and 
  exirimis, 
  Wesm., 
  

   were 
  supposed 
  by 
  Haliday 
  to 
  be 
  identical 
  with 
  this 
  

   species 
  ; 
  they 
  have, 
  however, 
  the 
  1st 
  abdominal 
  segment 
  

   smooth, 
  not 
  rimulose, 
  and 
  in 
  that 
  respect 
  resemble 
  

   rather 
  O. 
  liigens, 
  Hal. 
  (sp. 
  1). 
  I 
  am 
  not 
  able, 
  from 
  the 
  

   want 
  of 
  specimens, 
  to 
  clear 
  up 
  the 
  doubts 
  attending 
  

   these 
  little-known 
  insects. 
  0. 
  apicidator, 
  Nees, 
  differs 
  

   from 
  lugens, 
  Hal., 
  in 
  having 
  the 
  1st 
  segment 
  finely 
  

   rimulose, 
  though 
  still 
  rather 
  shining. 
  

  

  5. 
  Opius 
  clarus, 
  Hal. 
  

  

  O. 
  clarus, 
  Hal., 
  Ent. 
  Mag., 
  iv., 
  206, 
  ? 
  . 
  

  

  Black 
  ; 
  base 
  of 
  2d 
  abdominal 
  segment 
  rufous. 
  Clypeus 
  and 
  

   mandibles 
  rufous, 
  the 
  latter 
  emarginate 
  beneath 
  at 
  the 
  base, 
  and 
  

   not 
  touching 
  the 
  clypeus. 
  Antennae 
  34-joiuted, 
  longer 
  than 
  the 
  

   body 
  ; 
  scape 
  rufous. 
  Mesothoracic 
  sutures 
  obsolete. 
  No 
  puncti- 
  

   form 
  impression 
  before 
  the 
  scutellum. 
  Mesopleurse 
  with 
  an 
  im- 
  

   punctate 
  furrow. 
  Metathorax 
  smooth 
  in 
  the 
  middle, 
  rugulose 
  on 
  

   the 
  sides. 
  Furrow 
  of 
  the 
  mesopleurse 
  impunctate. 
  Wings 
  hyaline 
  ; 
  

   squamula 
  rufous 
  ; 
  nervures 
  fuscous 
  ; 
  stigma 
  paler 
  fuscous, 
  narrow, 
  

   linear, 
  lanceolate, 
  emitting 
  the 
  radius 
  before 
  i 
  of 
  its 
  length 
  ; 
  

   radial 
  areolet 
  nearly 
  reaching 
  the 
  extremity 
  of 
  the 
  wing 
  ; 
  2d 
  

   cubital 
  areolet 
  very 
  little 
  narrowed 
  outwards 
  ; 
  recurrent 
  nervure 
  

   evected. 
  Hind 
  wings 
  with 
  a 
  vestige 
  of 
  the 
  pobrachial 
  transverse 
  

   nervure. 
  Legs 
  rufous 
  ; 
  fore 
  coxae 
  testaceous. 
  First 
  abdominal 
  

   segment 
  oblong, 
  rugulose 
  ; 
  2d 
  segment 
  rufous, 
  determinately 
  black 
  

   at 
  the 
  apex 
  ; 
  the 
  following 
  segments 
  black. 
  Terebra 
  subexserted. 
  

   Male 
  unknown. 
  Length, 
  1 
  line. 
  

  

  I 
  have 
  not 
  met 
  with 
  any 
  Opius 
  which 
  can 
  be 
  referred 
  

   with 
  certainty 
  to 
  this 
  species, 
  which 
  is 
  not 
  sufficiently 
  

   distinguished 
  from 
  spretus 
  (sp. 
  7) 
  ; 
  in 
  fact, 
  no 
  distinctive 
  

   character 
  is 
  pointed 
  out 
  excej)t 
  the 
  uncertain 
  difference 
  

   between 
  rufous 
  and 
  fiavo-testaceous. 
  The 
  locality 
  also 
  

   is 
  omitted. 
  

  

  6. 
  Opuis 
  victus, 
  Hal. 
  

  

  O. 
  victus, 
  Hal., 
  Ent. 
  Mag., 
  iv., 
  207, 
  ? 
  . 
  

  

  Black 
  ; 
  mandibles 
  and 
  clypeus 
  testaceous 
  ; 
  clypeus 
  not 
  reaching 
  

   the 
  mandibles 
  ; 
  palpi 
  elongate, 
  very 
  pale 
  ; 
  face 
  obsoletelj- 
  carinated. 
  

   Antennae 
  one-half 
  longer 
  than 
  the 
  body, 
  31 
  — 
  34-jointed, 
  fuscous, 
  

   broadly 
  testaceous 
  at 
  the 
  base. 
  No 
  punctiform 
  impression 
  before 
  

  

  