﻿NO. 
  1966. 
  SYNOPSIS 
  OF 
  NEOTROPICAL 
  LIMNOBIN.^— 
  ALEXANDER. 
  535 
  

  

  R2+3 
  short 
  but 
  longer 
  than 
  M^; 
  basal 
  deflection 
  of 
  R4+5 
  distinct, 
  as 
  

   long 
  as 
  r-m; 
  basal 
  defl,ection 
  of 
  Cu^ 
  slightly 
  beyond 
  the 
  fork 
  of 
  M; 
  

   Cui 
  +M3 
  about 
  equal 
  to 
  Cuj 
  beyond 
  M3. 
  (See 
  fig. 
  5.) 
  

  

  Abdomen: 
  tergum, 
  dark 
  brown; 
  sternum, 
  lighter 
  colored. 
  

  

  Habitat. 
  — 
  Eolotype. 
  — 
  Male, 
  Tukeit, 
  British 
  Guiana. 
  July 
  20, 
  1911 
  

   (coll. 
  Lutz). 
  

  

  Type. 
  — 
  In 
  American 
  Museum 
  of 
  Natural 
  History. 
  

  

  Differs 
  from 
  all 
  of 
  the 
  known 
  species 
  in 
  the 
  extreme 
  recession 
  of 
  

   the 
  cross- 
  vein 
  r. 
  

  

  POLYMERA 
  GRISEA, 
  new 
  species. 
  

  

  Size, 
  small; 
  flagellar 
  segments 
  of 
  the 
  antennae 
  bi-nodose; 
  cell 
  M^ 
  

   present; 
  dark 
  pleural 
  stripe 
  narrow, 
  distinct; 
  wings 
  gray. 
  

  

  Male. 
  — 
  Length, 
  3-3.5 
  mm. 
  (about) 
  ; 
  wing, 
  4.6; 
  antenna, 
  7.5 
  (about). 
  

  

  Related 
  to 
  alhitarsis 
  Williston 
  in 
  its 
  general 
  coloration 
  and 
  vena- 
  

   tion 
  but 
  very 
  much 
  smaller. 
  In 
  the 
  dark 
  narrow 
  pleural 
  stripe 
  it 
  

   agrees 
  well 
  with 
  Williston's 
  description.^ 
  The 
  wings 
  are 
  slightly 
  

   grayish, 
  not 
  brown; 
  basal 
  segments 
  of 
  the 
  antennae 
  dark 
  brown; 
  the 
  

   legs 
  are 
  lacking 
  excepting 
  one 
  of 
  the 
  fore 
  pair. 
  (See 
  fig. 
  6.) 
  

  

  Habitat. 
  — 
  Holotype. 
  — 
  Male, 
  Ancon, 
  Canal 
  Zone, 
  Panama 
  (A. 
  H. 
  

   Jennings 
  coll.) 
  . 
  

  

  Type. 
  — 
  InU. 
  S. 
  National 
  Museum 
  collection 
  (No. 
  14937). 
  

  

  Genus 
  EPIPHRAGMA 
  Osten 
  Sacken. 
  

  

  Epiphragma 
  Osten 
  Sacken, 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Phila., 
  1859, 
  p. 
  238; 
  Mono- 
  

   graphs, 
  vol. 
  4, 
  1869, 
  p. 
  193; 
  Studies, 
  etc., 
  pt. 
  2, 
  1887, 
  p. 
  208. 
  

  

  This 
  weU-defined 
  genus 
  reaches 
  its 
  maximum 
  of 
  species 
  in 
  tropical 
  

   America. 
  Several 
  of 
  the 
  species 
  that 
  have 
  until 
  now 
  been 
  character- 
  

   ized 
  as 
  "Limnobia" 
  are 
  undoubtedly 
  Epiphragmae 
  and 
  I 
  treat 
  them 
  as 
  

   such 
  in 
  this 
  paper. 
  

  

  KEY 
  TO 
  THE 
  SPECIES 
  OP 
  EPIPHRAGMA. 
  

  

  1. 
  Wings 
  with 
  complete 
  unicolorous 
  fascioe, 
  brown 
  or 
  white, 
  extending 
  across 
  the 
  

  

  wing 
  2. 
  

  

  Wings 
  with 
  ocellate 
  marks, 
  or 
  pale-margined 
  spots, 
  or 
  incomplete 
  fascise 
  3. 
  

  

  2. 
  White 
  fasciae 
  about 
  three; 
  brown 
  fasciae, 
  as 
  a 
  rule, 
  not 
  connected; 
  tip 
  of 
  tibiae 
  

  

  dark 
  fascipennis 
  Say 
  ^ 
  (East. 
  U. 
  S.). 
  

  

  A 
  single 
  white 
  fascia 
  across 
  the 
  middle 
  of 
  the 
  wing, 
  o^ralg 
  to 
  the 
  confluence 
  of 
  the 
  

   two 
  brown 
  fasciae 
  on 
  either 
  side; 
  tip 
  of 
  tibiae 
  light 
  yellow, 
  

  

  imitans, 
  new 
  species 
  (Bolivia). 
  

  

  3. 
  Ground 
  color 
  of 
  the 
  wing 
  dark 
  bro-svn 
  or 
  rusty-brown 
  4. 
  

  

  Ground 
  color 
  of 
  the 
  wing 
  pale 
  brown, 
  gray, 
  subhyaline 
  or 
  hyaline 
  6. 
  

  

  4. 
  Thoracic 
  dorsum 
  velvety 
  black, 
  with 
  a 
  bright 
  yellow, 
  very 
  conspicuous, 
  spot, 
  

  

  histrio 
  Schiaer^ 
  (Colombia). 
  

   Thoracic 
  dorsum 
  not 
  velvety-black 
  and 
  yellow 
  5. 
  

  

  » 
  Dipt. 
  St. 
  Vincent, 
  Trans. 
  Ent. 
  Soc. 
  Lond., 
  1896, 
  pp. 
  296, 
  297. 
  

   i 
  Osten 
  Sacken, 
  Monographs, 
  vol. 
  4, 
  1869, 
  p. 
  194, 
  male 
  and 
  female. 
  

   ' 
  Reise 
  Novara, 
  Dipt., 
  1868, 
  p. 
  41; 
  male. 
  

  

  