﻿542 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  Wings: 
  hyaline 
  or 
  nearly 
  so; 
  anterior 
  margin 
  with 
  about 
  eight 
  

   large 
  brown 
  spots 
  along 
  the 
  margin, 
  the 
  fifth 
  being 
  at 
  the 
  tip 
  of 
  So; 
  

   between 
  the 
  large 
  spots 
  are 
  scattered 
  smaller 
  dots. 
  The 
  whole 
  disk 
  

   of 
  the 
  wing 
  is 
  covered 
  with 
  pale 
  greyish-brown 
  spots 
  distributed 
  as 
  

   in 
  the 
  figure. 
  Venation 
  as 
  in 
  fig. 
  34. 
  

  

  Abdomen: 
  tergum 
  brown; 
  sterna 
  brown; 
  apices 
  of 
  segments 
  paler; 
  

   hypopygium 
  dark 
  brown. 
  

  

  One 
  male 
  from 
  ''Forest, 
  British 
  Guiana; 
  Aug. 
  5, 
  1911 
  (Crampton 
  

   coll.). 
  Specimen 
  in 
  the 
  American 
  Museum 
  of 
  Natural 
  History. 
  

  

  Genus 
  CTEDONIA 
  Philippi. 
  

  

  Ctedonia 
  Philippi, 
  Verb. 
  Zool-bot. 
  Ges. 
  Wien, 
  vol. 
  15, 
  1865, 
  p. 
  602.— 
  Osten 
  

   Sacken, 
  Monographs, 
  vol. 
  4, 
  1869, 
  p. 
  334; 
  Studies 
  on 
  Tipulidae, 
  pt. 
  2, 
  1887, 
  

   p. 
  213. 
  

  

  The 
  following 
  description 
  is 
  translated 
  from 
  Philippi's 
  original 
  

   characterization 
  of 
  the 
  genus 
  ^ 
  by 
  Osten 
  Sacken. 
  I 
  have 
  adopted 
  

   this 
  translation 
  ^ 
  almost 
  as 
  it 
  stands 
  : 
  

  

  Head 
  small, 
  globose, 
  attenuated 
  behind, 
  produced 
  anteriorly 
  into 
  a 
  stout 
  hori- 
  

   zontal 
  rostrum. 
  Eyes 
  globose, 
  rather 
  remote. 
  No 
  ocelli. 
  The 
  antennae 
  in 
  len^-th 
  

   are 
  equal 
  to 
  about 
  three-quarters 
  of 
  the 
  head 
  and 
  the 
  thorax 
  taken 
  together; 
  from 
  15 
  

   to 
  24 
  segmented; 
  first 
  segment 
  cylindrical, 
  stout; 
  the 
  second 
  equal 
  to 
  one-third 
  of 
  

   the 
  first, 
  eubglobular; 
  the 
  following 
  eight 
  (to 
  12), 
  cylindrical, 
  subequal, 
  emitting 
  a 
  

   filament 
  and 
  thus 
  forming 
  a 
  comb; 
  the 
  projection 
  of 
  the 
  third 
  segment 
  is 
  on 
  the 
  

   external 
  side 
  and 
  short; 
  the 
  fourth 
  segment 
  has 
  one 
  on 
  the 
  inside 
  and 
  another 
  on 
  

   the 
  outside; 
  the 
  segments 
  5, 
  6, 
  7, 
  8, 
  9, 
  10 
  and 
  beyond, 
  have 
  on 
  the 
  inside 
  a 
  long 
  pro- 
  

   jection; 
  segment 
  11 
  has 
  a 
  short 
  one 
  on 
  the 
  inside; 
  the 
  nine 
  following 
  segments 
  are 
  

   cylindrical 
  and 
  difficult 
  to 
  distinguish. 
  Palpi 
  4-segmented, 
  segments 
  cylindrical, 
  

   the 
  fourth 
  stout, 
  rather 
  short, 
  although 
  a 
  little 
  longer 
  than 
  the 
  third. 
  The 
  tibiae 
  have 
  

   two 
  spurs 
  at 
  the 
  tip. 
  

  

  The 
  genus 
  was 
  not 
  represented 
  in 
  any 
  of 
  the 
  material 
  that 
  I 
  received 
  

   for 
  examination. 
  

  

  KEY 
  TO 
  THE 
  SPECIES 
  OP 
  CTEDONIA. 
  

  

  1. 
  Antennae 
  with 
  only 
  15 
  segments; 
  wings 
  hyaline 
  with 
  two 
  black 
  spots, 
  the 
  large 
  

  

  one 
  extending 
  from 
  cell 
  first 
  M2 
  to 
  the 
  stigma, 
  .bipunctulata^ 
  Philippi 
  (Chile). 
  

   Antennae 
  with 
  22 
  or 
  more 
  segments 
  2. 
  

  

  2. 
  "Wings 
  almost 
  unicoloroiis 
  3. 
  

  

  Wings 
  with 
  brown 
  clouds, 
  on 
  a 
  limpid 
  ground 
  pictipennis* 
  Philippi 
  (Chile). 
  

  

  3. 
  Body 
  gray; 
  head 
  blackish; 
  wings 
  yellowish 
  with 
  a 
  pale 
  brown 
  stigmal 
  spot; 
  feet 
  

  

  yellowish, 
  the 
  tip 
  of 
  the 
  fore 
  femur 
  with 
  a 
  brown 
  band; 
  antennae 
  with 
  22 
  seg- 
  

   ments 
  flavipennis 
  ^ 
  Philippi 
  (Chile). 
  

  

  Body 
  yellow 
  except 
  the 
  head, 
  antennae, 
  palpi, 
  sternum 
  of 
  thorax 
  including 
  the 
  

   coxae; 
  tip 
  of 
  abdomen; 
  tibiae 
  and 
  tarsi, 
  which 
  are 
  black; 
  wings 
  somewhat 
  

   yellowish-brown; 
  femora 
  luteus; 
  antennae 
  with 
  24 
  segments. 
  

  

  bicolor^ 
  Philippi 
  (Chile). 
  

  

  1 
  Verh. 
  Zool-Bot. 
  Ges. 
  Wien, 
  vol. 
  15, 
  1865, 
  p. 
  602. 
  

  

  2 
  Monographs, 
  vol. 
  4, 
  p. 
  334. 
  

  

  ' 
  Verh. 
  Zool-Bot. 
  Ges. 
  Wien, 
  1865, 
  p. 
  603, 
  male 
  and 
  female 
  (7). 
  

  

  * 
  Idem, 
  p. 
  603, 
  female. 
  . 
  

   s 
  Idem, 
  pp. 
  602, 
  603, 
  female. 
  

  

  • 
  Idem, 
  p. 
  603, 
  male. 
  

  

  