﻿34 
  Kev. 
  T. 
  A. 
  Marshall's 
  Mono^jraph 
  of 
  

  

  19. 
  Opius 
  maculipes, 
  "Wesm. 
  

  

  0. 
  macuUpes, 
  Wesm., 
  Nouv. 
  Mem. 
  Ac. 
  Brux., 
  1835, 
  

   p. 
  128; 
  Hal., 
  Ent. 
  Mag., 
  iv., 
  210, 
  <? 
  ? 
  . 
  

  

  Black 
  ; 
  abdomen 
  $ 
  testaceous, 
  except 
  the 
  1st 
  sej^ment 
  ; 
  in 
  tlie 
  <? 
  

   testaceous, 
  with 
  the 
  apex 
  blackish. 
  Face 
  distinctly 
  carinated 
  ! 
  

   clypeus 
  sometimes 
  black 
  at 
  the 
  base, 
  rather 
  widelj' 
  separated 
  from 
  

   the 
  mandibles, 
  which 
  are 
  dilated 
  at 
  the 
  base, 
  and 
  gradually 
  

   diminish 
  to 
  the 
  points. 
  Palpi 
  testaceous. 
  Antennae 
  longer 
  than 
  

   the 
  body, 
  33 
  — 
  35-jointed, 
  under 
  side 
  of 
  the 
  1st 
  joint 
  and 
  extremity 
  

   of 
  the 
  2d 
  more 
  or 
  less 
  rufo-testaceons. 
  Mesothoracic 
  sutures 
  

   effaced. 
  Mesopleurse 
  with 
  an 
  impunctate 
  furroAV. 
  A 
  punctiform 
  

   impression 
  before 
  the 
  scutellum. 
  Metathoras 
  finely 
  granulated, 
  

   dull. 
  ^Yings 
  hyaline 
  ; 
  nervures 
  and 
  stigma 
  fusco-testaceous 
  ; 
  

   stigma 
  elongate-oval, 
  emitting 
  the 
  radius 
  before 
  the 
  middle 
  ; 
  1st 
  

   abscissa 
  very 
  short, 
  almost 
  punctiform 
  ; 
  3d 
  slightly 
  curved 
  ; 
  2d 
  

   cubital 
  areolet 
  attenuated 
  outwards; 
  recurrent 
  ner\-ure 
  evected. 
  

   Legs 
  testaceous, 
  tips 
  of 
  the 
  hind 
  tibiae 
  fuscescent. 
  Abdomen 
  

   elongate-oval 
  ; 
  1st 
  segment 
  black, 
  rugulose, 
  smoother 
  at 
  the 
  base 
  ; 
  

   the 
  following 
  segments 
  testaceous 
  ; 
  in 
  the 
  ^ 
  the 
  3 
  apical 
  segments 
  

   are 
  blackish. 
  Terebra 
  subexserted. 
  Length, 
  f 
  — 
  1^ 
  ; 
  wings. 
  

  

  Distinguished 
  from 
  0. 
  cingulatus 
  (sp. 
  20) 
  by 
  the 
  

   fuscesceut 
  tips 
  of 
  the 
  hind 
  tibige, 
  and 
  the 
  absence 
  of 
  

   dark 
  margins 
  to 
  the 
  intermediate 
  segments 
  ; 
  the 
  2d 
  

   cubital 
  areolet 
  is 
  not 
  so 
  much 
  narrowed 
  outwards, 
  and 
  

   the 
  abdomen 
  is 
  longer 
  and 
  narrower 
  ; 
  also 
  the 
  podiscoidal 
  

   areolet 
  is 
  generally 
  more 
  completely 
  closed, 
  the 
  trans- 
  

   verse 
  nervures 
  reaching 
  the 
  bottom, 
  which 
  is 
  hardly 
  the 
  

   case 
  in 
  0. 
  cingulatus. 
  Hence 
  Forster 
  established 
  a 
  new 
  

   genus 
  Nosopcea 
  for 
  the 
  latter 
  species 
  ; 
  but 
  the 
  character 
  

   employed 
  for 
  distinction 
  is 
  often 
  inappreciable, 
  or 
  even 
  

   reversed, 
  in 
  the 
  two 
  sj^ecies. 
  0. 
  maculipcs 
  is 
  one 
  of 
  the 
  

   commonest 
  in 
  the 
  genus 
  ; 
  Wesmael 
  described 
  it 
  from 
  

   6 
  females 
  and 
  5 
  males 
  taken 
  in 
  May 
  and 
  June 
  near 
  

   Brussels. 
  Haliday 
  found 
  a 
  pair 
  on 
  a 
  willow 
  in 
  North 
  

   Ireland 
  in 
  Maj'-, 
  and 
  a 
  ? 
  in 
  August 
  near 
  the 
  Shannon 
  ; 
  

   his 
  specimens 
  were 
  smaller 
  than 
  cingulatus, 
  ranging 
  

   from 
  f 
  to 
  1 
  line, 
  while 
  the 
  Belgian 
  specimens 
  are 
  de- 
  

   scribed 
  as 
  larger 
  ; 
  "Walker's 
  si^ecimen, 
  taken 
  in 
  England, 
  

   was 
  the 
  smallest 
  of 
  all. 
  I 
  possess 
  8 
  from 
  different 
  parts 
  

   of 
  the 
  country, 
  and 
  Dr. 
  Eeinhard 
  sent 
  me 
  one 
  from 
  

   Dresden. 
  

  

  