﻿On 
  Ileterocera 
  from 
  Costa 
  Rica. 
  173 
  

  

  Fig. 
  5 
  c. 
  Crotchet 
  or 
  hook 
  of 
  the 
  foregoing. 
  X 
  Zeiss 
  oc. 
  2, 
  obj. 
  D. 
  

  

  Fig. 
  5 
  d. 
  Fortieth 
  foot 
  of 
  the 
  same. 
  Enlarged. 
  

  

  Fig. 
  5 
  e. 
  Dorsal 
  crotchet 
  of 
  the 
  fortieth 
  foot. 
  X 
  Zeiss 
  oc. 
  2, 
  obj. 
  D. 
  

  

  Fig. 
  6 
  a. 
  Bristle 
  of 
  Chcetozone 
  Z. 
  x 
  Zeiss 
  oc. 
  4, 
  obj. 
  D. 
  

  

  Fig. 
  7. 
  Head 
  and 
  anterior 
  region 
  of 
  Cirratulispio. 
  Enlarged. 
  

  

  Plate 
  VII. 
  

  

  Fig. 
  la. 
  Bristle 
  from 
  the 
  seventh 
  foot 
  of 
  Cirratulispio. 
  X 
  Zeiss 
  oc. 
  4 
  

   obj. 
  L>, 
  with 
  full 
  draw-tube. 
  

  

  Fig. 
  7 
  b. 
  Crotchet 
  from 
  the 
  first 
  segment 
  of 
  the 
  second 
  region 
  of 
  the 
  

   foregoing. 
  X 
  Zeiss 
  oc 
  4, 
  obj. 
  D. 
  

  

  Fig. 
  8. 
  Bristle 
  of 
  Chcetozone 
  I., 
  Canada. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  D. 
  

  

  Fig. 
  9. 
  Anterior 
  bristle 
  of 
  Chcetozone 
  setosa, 
  var. 
  canadensis, 
  from 
  the 
  

   tenth 
  foot. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  D. 
  

  

  Fig. 
  9 
  a. 
  Posterior 
  hook 
  (crotchet) 
  of 
  the 
  same. 
  X 
  as 
  above. 
  

  

  Fig. 
  9 
  b. 
  Capillary 
  bristle 
  alternating 
  with 
  crotchets. 
  X 
  as 
  above. 
  

  

  Fig. 
  10. 
  Bristles 
  of 
  Chcetozone 
  whiteavesi. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  U. 
  

  

  Fig. 
  11. 
  Hook 
  of 
  Chcetozone 
  setosa, 
  var., 
  from 
  Norway. 
  X 
  Zeiss 
  oc. 
  4, 
  

   obj. 
  D. 
  

  

  Fig. 
  12. 
  Tip 
  of 
  tail 
  of 
  Cirratulus 
  norcegicus, 
  unfortunately 
  from 
  a 
  speci- 
  

   men 
  not 
  quite 
  complete. 
  

  

  Fig. 
  12 
  a. 
  Bristles 
  of 
  the 
  foregoing, 
  x 
  as 
  above. 
  

  

  XVII. 
  — 
  Nero 
  Species 
  of 
  Ileterocera 
  from 
  Costa 
  Rica. 
  — 
  V. 
  

   By 
  W. 
  Schaus, 
  F.Z.S. 
  

  

  Syntomidae. 
  

  

  Isanthrene 
  monticola, 
  sp. 
  n. 
  

  

  Antennas 
  with 
  the 
  shaft 
  black 
  on 
  basal 
  half 
  and 
  at 
  tips, 
  

   otherwise 
  white. 
  Body 
  ochreous 
  ; 
  palpi 
  tipped 
  with 
  black 
  ; 
  

   black 
  spots 
  on 
  tegulse, 
  five 
  on 
  thorax 
  ; 
  black 
  line 
  on 
  shoulders; 
  

   dorsal 
  and 
  lateral 
  black 
  spots 
  on 
  basal 
  segment 
  of 
  abdomen, 
  

   followed 
  by 
  black 
  intersegmental 
  spots 
  on 
  other 
  segments. 
  

   Wings 
  hyaline, 
  the 
  margins 
  ochreous. 
  Fore 
  wings 
  : 
  the 
  

   veins 
  ochreous, 
  partly 
  irrorated 
  with 
  black 
  ; 
  black 
  streaks 
  at 
  

   base 
  of 
  costal 
  and 
  subcostal 
  veins 
  ; 
  apex 
  and 
  tornus 
  more 
  

   broadly 
  ochreous, 
  inwardly 
  edged 
  with 
  black. 
  Hind 
  wings 
  : 
  

   the 
  veins 
  and 
  inner 
  margin 
  finely 
  black. 
  

  

  Expanse 
  34 
  mm. 
  

  

  Bab. 
  El 
  Sitio. 
  

  

  Sarosa 
  mora, 
  sp. 
  n. 
  

  

  Antenna? 
  black 
  tipped 
  with 
  rufous. 
  Body 
  black 
  ; 
  some 
  

   blue 
  on 
  frons 
  ; 
  whitish-yellow 
  spots 
  on 
  tegulaj 
  outwardly 
  

  

  