﻿Ileterocera 
  from 
  Costa 
  Rica. 
  269 
  

  

  between 
  veins 
  2 
  and 
  3 
  ; 
  an 
  indistinct 
  subterminal 
  line, 
  

   punctiform 
  on 
  veins 
  ; 
  cilia 
  whitish 
  buff 
  and 
  brown. 
  Hind 
  

   wings 
  white, 
  the 
  veins 
  and 
  margin 
  irrorated 
  with 
  fuscous 
  

   hairs 
  ; 
  a 
  fuscous 
  streak 
  near 
  inner 
  margin. 
  

  

  Expanse 
  ol 
  mm. 
  

  

  Hub. 
  Sixola, 
  Juan 
  Vinas. 
  

  

  Allied 
  to 
  I), 
  stridula, 
  Schs., 
  and 
  D. 
  disparilis, 
  Schs. 
  

  

  Dicentria 
  rivalis, 
  sp. 
  n. 
  

  

  <$ 
  . 
  Palpi 
  buff, 
  a 
  fuscous-brown 
  patch 
  laterally. 
  Head 
  and 
  

   thorax 
  mottled 
  brown 
  and 
  fuscous. 
  Abdomen 
  above 
  fuscous, 
  

   the 
  terminal 
  segments 
  buff 
  and 
  brown. 
  Fore 
  wings 
  buff- 
  

   brown, 
  shaded 
  with 
  pale 
  reddish 
  brown 
  on 
  inner 
  margin; 
  a 
  

   dark 
  brown 
  space 
  at 
  base 
  of 
  costa 
  and 
  cell 
  ; 
  a 
  pale 
  line 
  on 
  

   either 
  side 
  of 
  discocellular, 
  preceded 
  in 
  cell 
  by 
  a 
  dark 
  shade 
  

   and 
  followed 
  by 
  a 
  dark 
  brown 
  streak 
  from 
  between 
  4 
  and 
  5 
  

   obliquely 
  across 
  vein 
  5; 
  antemedial 
  line 
  faintly 
  indicated; 
  

   small 
  postmedial 
  geminate 
  streaks 
  on 
  veins 
  ; 
  subterminal 
  

   fuscous 
  spots 
  above 
  vein 
  6 
  ; 
  a 
  dark 
  brown 
  space 
  on 
  outer 
  

   margin 
  from 
  vein 
  2 
  to 
  above 
  vein 
  3 
  ; 
  veins 
  terminally 
  

   fuscous 
  ; 
  terminal 
  brown 
  spots 
  between 
  veins 
  ; 
  fuscous 
  spots 
  

   on 
  cilia 
  at 
  veins. 
  Hind 
  wings 
  white, 
  some 
  terminal 
  brown 
  

   scales 
  ; 
  a 
  fuscous 
  shade 
  at 
  anal 
  angle. 
  

  

  Expanse 
  35 
  mm. 
  

  

  ? 
  . 
  Fore 
  wings 
  greyer; 
  the 
  lines 
  and 
  spots 
  more 
  distinct 
  ; 
  

   the 
  spot 
  on 
  discocellular 
  oval, 
  whitish 
  grey, 
  with 
  dark 
  centre 
  ; 
  

   a 
  geminate 
  dark 
  wavy 
  line 
  before 
  cell-spot 
  ; 
  a 
  curved 
  dentate 
  

   fuscous 
  line 
  just 
  beyond 
  cell 
  ; 
  the 
  postmedial 
  very 
  oblique 
  on 
  

   costa 
  and 
  finely 
  dentate, 
  geminate 
  ; 
  the 
  subterminal 
  spots 
  

   larger. 
  Hind 
  wings 
  : 
  the 
  veins 
  terminally 
  and 
  outer 
  margin 
  

   fuscous. 
  

  

  Expanse 
  44 
  mm. 
  

  

  Hah. 
  Juan 
  Vinas, 
  Guapiles. 
  

  

  Allied 
  to 
  D. 
  palmita, 
  Schs. 
  

  

  Dicentria 
  rustica, 
  sp. 
  n. 
  

  

  g 
  . 
  Head 
  and 
  thorax 
  mottled 
  grey-brown 
  and 
  fuscous 
  ; 
  

   frons 
  shaded 
  with 
  buff. 
  Abdomen 
  above 
  black 
  ; 
  a 
  buff 
  

   space 
  dorsally 
  on 
  last 
  two 
  segments 
  ; 
  underneath 
  whitish 
  

   buff; 
  a 
  black 
  ventral 
  space 
  at 
  base; 
  the 
  legs 
  fringed 
  with 
  

   long, 
  black 
  hairs. 
  Fore 
  wings 
  dull 
  brown, 
  irrorated 
  with 
  

   fuscous 
  brown, 
  especially 
  at 
  base, 
  on 
  inner 
  margin, 
  and 
  above 
  

   tornus; 
  a 
  fuscous 
  shade 
  at 
  end 
  of 
  cell; 
  antemedial 
  very 
  

   indistinct, 
  fuscous; 
  fine 
  fuscous 
  streaks 
  between 
  veins 
  beyond 
  

   cell 
  ; 
  postmedial 
  black 
  points 
  on 
  veins 
  ; 
  veins 
  dark 
  brown 
  ; 
  

  

  