﻿heiv 
  sjjecies 
  of 
  liolophthalmous 
  Ascalaphidce. 
  5l6 
  

  

  appendages. 
  Wings 
  uniformly 
  dark 
  fuliginous, 
  darker 
  towards 
  the 
  

   base, 
  with 
  slightly 
  brassy 
  reflections 
  in 
  certain 
  lights 
  ; 
  iDterostigma 
  

   small, 
  but 
  conspicuously 
  whitish, 
  traversed 
  by 
  3 
  or 
  4 
  dark 
  ner- 
  

   vules 
  : 
  ueuration 
  black, 
  the 
  whole 
  of 
  the 
  transverse 
  nervules 
  mar- 
  

   gined 
  with 
  smoky 
  blackish 
  ; 
  about 
  35 
  costal 
  nervules 
  before 
  the 
  

   pterostigma 
  in 
  the 
  anterior 
  wings 
  ; 
  nervules 
  of 
  the 
  post-stigmatical 
  

   area 
  (confused 
  with 
  the 
  pterostigma) 
  6 
  or 
  7, 
  long, 
  curved, 
  forked 
  at 
  

   the 
  ends, 
  with 
  sparse 
  cross 
  nervules, 
  forming 
  transverse 
  oblong 
  

   cellules 
  : 
  a 
  triangular 
  tooth 
  near 
  the 
  base 
  of 
  the 
  inner 
  margin 
  

   of 
  the 
  anterior 
  wings, 
  sharply 
  defined, 
  narrow, 
  veined, 
  subobtuse, 
  

   the 
  base 
  of 
  the 
  inner 
  margin 
  being 
  deeply 
  and 
  semicircularly 
  

   excavated 
  before 
  the 
  tooth. 
  Length 
  of 
  body, 
  36 
  mm. 
  Expanse 
  

   of 
  wings, 
  69 
  mm. 
  Length 
  of 
  anterior 
  wing, 
  32 
  mm. 
  ; 
  greatest 
  

   breadth, 
  lOi 
  mm. 
  Length 
  of 
  posterior 
  wing, 
  29 
  mm. 
  

  

  Hah. 
  Mardin 
  in 
  Mesopotamia 
  ; 
  one 
  c? 
  in 
  the 
  collection 
  

   of 
  Mr. 
  Albarda, 
  of 
  Leeuwarden. 
  

  

  When 
  defining 
  the 
  genus 
  Idricerus 
  in 
  my 
  ' 
  Classifica- 
  

   tion 
  of 
  the 
  Family 
  AscalapMdce' 
  (Journ. 
  Linn. 
  Soc, 
  

   ZooL, 
  vol. 
  xi.), 
  I 
  placed 
  it, 
  m 
  the 
  tabular 
  synopsis, 
  in 
  a 
  

   section 
  in 
  which 
  the 
  anterior 
  wings 
  are 
  " 
  haud 
  appen- 
  

   diculatas 
  "; 
  but 
  I 
  had 
  already 
  shown 
  that 
  in 
  at 
  least 
  one 
  

   species 
  of 
  Haploglenius 
  (likewise 
  holophthalmous) 
  the 
  

   wings 
  are 
  exceptionally 
  appendiculate 
  : 
  in 
  effect 
  it 
  is 
  

   sometimes 
  diflicult 
  to 
  draw 
  the 
  line 
  between 
  what 
  in 
  

   some 
  cases 
  is 
  only 
  a 
  prominent 
  angle, 
  and 
  in 
  others 
  a 
  

   tooth. 
  I 
  leave 
  the 
  insect 
  doubtfully 
  in 
  Idricerus. 
  

  

  This 
  is 
  a 
  very 
  striking 
  species 
  from 
  its 
  coloration 
  (in 
  

   less 
  mature 
  individuals 
  the 
  wings 
  are 
  probably 
  paler), 
  

   and 
  also 
  from 
  the 
  process 
  on 
  the 
  dorsum 
  of 
  the 
  abdomen 
  

   in 
  the 
  ^ 
  , 
  but 
  approach 
  towards, 
  or 
  modifications 
  of, 
  

   such 
  a 
  formation, 
  are 
  not 
  uncommon 
  in 
  Ascalaphidce, 
  

   and 
  nearly 
  a 
  parallel 
  may 
  be 
  found 
  in 
  Ptynx 
  furciger, 
  

   p. 
  509, 
  ante. 
  

  

  