﻿532 
  I'ROCEEDINOS 
  OF 
  THE 
  NATIOXAL 
  MUSEUM. 
  vol.44. 
  

  

  POLYMERA 
  HIRTICORNIS 
  Fabricius. 
  

  

  Chironomus 
  hirlicornis 
  Fabkicius, 
  Syst. 
  Antliar, 
  1805, 
  p. 
  46. 
  — 
  Wiedemann, 
  

  

  Dipt. 
  Exot., 
  vol. 
  1, 
  1821, 
  p. 
  37, 
  fig. 
  

   Polymera 
  hirticornis 
  Wiedemann, 
  Auss. 
  Zweifl. 
  Ins., 
  1828, 
  vol. 
  1, 
  p. 
  57. 
  — 
  

  

  Macquart, 
  Suite 
  h 
  Buffon, 
  vol. 
  1, 
  1834, 
  p. 
  113. 
  — 
  Hunter, 
  Trans. 
  Amer. 
  

  

  Ent. 
  Soc, 
  vol. 
  26, 
  1900, 
  p. 
  292.— 
  Kertesz, 
  Catalogua 
  Dipterorum, 
  vol. 
  2, 
  

  

  1902, 
  p. 
  242.— 
  Alexander, 
  Psyche, 
  1911, 
  p. 
  200. 
  

  

  Male. 
  — 
  Length, 
  7.6 
  mm.; 
  wiiig, 
  7 
  mm.; 
  antenna, 
  8 
  mm. 
  (about). 
  

   Head: 
  rostrum 
  and 
  palpi, 
  gense 
  and 
  occiput, 
  orange-yellow; 
  vertex 
  

   brown, 
  the 
  anterior 
  portion 
  paler 
  yellowish; 
  front 
  yellow. 
  Antennae, 
  

   basal 
  segments, 
  brownish-yellow, 
  segment 
  3 
  dark 
  brown, 
  yellowish 
  

   basally, 
  remaining 
  segments 
  bi-nodose, 
  dark 
  brown. 
  

  

  Thorax: 
  pronotum 
  yellow; 
  mesonotum: 
  prsescutum, 
  anterior 
  half 
  

   bright 
  yellow 
  with 
  a 
  brown 
  spot 
  in 
  the 
  middle 
  at 
  the 
  cej)halic 
  end, 
  

   remainder 
  of 
  the 
  praescutum 
  brown, 
  much 
  darker 
  anteriorly 
  near 
  the 
  

   pseudosuture; 
  scutum, 
  scutellum 
  and 
  postnotum 
  dark 
  brown; 
  

   pseudosuture 
  black. 
  Pleurae: 
  prothoracic, 
  yellow; 
  meso- 
  and 
  meta- 
  

   pleurae 
  dark 
  brownish-black. 
  Hal 
  teres 
  light 
  brownish- 
  white. 
  Legs: 
  

   coxae 
  and 
  trochanters 
  light 
  yellow; 
  femora 
  light 
  yellow, 
  darkening 
  to 
  

   form 
  a 
  brown 
  subapical 
  ring, 
  a 
  broad 
  yellow 
  apical 
  band; 
  tarsi 
  

   yellowish; 
  the 
  posterior 
  pair 
  white. 
  

  

  Wings: 
  brown 
  with 
  a 
  broad 
  pale 
  yellow 
  band 
  across 
  the 
  disk, 
  

   just 
  distad 
  of 
  the 
  cord 
  and 
  proximad 
  of 
  the 
  fork 
  of 
  M3 
  and 
  Cuj; 
  a 
  

   pale 
  yellow 
  spot 
  around 
  Es, 
  and 
  one 
  at 
  end 
  of 
  second 
  A; 
  costal 
  cell 
  

   and 
  base 
  of 
  wing 
  light 
  yellow; 
  veins 
  brown, 
  yellow 
  where 
  traversed 
  

   by 
  the 
  yellow 
  markings. 
  Venation: 
  Sc 
  very 
  long, 
  extending 
  far 
  

   bej^ond 
  the 
  fork 
  of 
  Rs; 
  cross-vein 
  r 
  far 
  back 
  from 
  the 
  tip 
  of 
  Ri 
  so 
  

   that 
  Rj 
  beyond 
  r 
  is 
  only 
  a 
  little 
  shorter 
  than 
  Ri 
  between 
  Scj 
  and 
  r; 
  

   R2+3 
  very 
  short, 
  less 
  than 
  the 
  basal 
  deflection 
  of 
  Cui. 
  Cui-f-Mg 
  

   much 
  shorter 
  than 
  M3 
  alone; 
  basal 
  deflection 
  of 
  Cuj 
  beyond 
  the 
  fork 
  

   of 
  M. 
  (See 
  fig. 
  3.) 
  

  

  Abdomen: 
  tergum 
  black, 
  extreme 
  tip 
  of 
  segments 
  2-5 
  brownish- 
  

   3'-ellow; 
  remainder 
  entirely 
  black; 
  hypopygium 
  orange-yellow; 
  

   sternum: 
  segment 
  2, 
  black; 
  3, 
  tip 
  orange; 
  4-6, 
  orange-yellow; 
  7-8, 
  

   black. 
  

  

  Igarape 
  Assti, 
  Para, 
  Brazil, 
  January 
  23, 
  1912 
  (coll. 
  Parish). 
  

  

  Specimen 
  in 
  Cornell 
  University 
  collection. 
  

  

  POLYMERA 
  NIVEITARSIS. 
  new 
  species. 
  

  

  Size, 
  large; 
  flagellum 
  of 
  the 
  antennae 
  almost 
  simple; 
  posterior 
  tarsi, 
  

   only, 
  white; 
  basal 
  deflection 
  of 
  R4+5 
  not 
  evident; 
  cell 
  M^ 
  present. 
  

  

  Male. 
  — 
  Length, 
  6.2 
  mm.; 
  wing, 
  7.3-7.4 
  mm.; 
  antennae 
  (about), 
  

   12.5 
  mm. 
  Head: 
  palpi 
  brown; 
  rostrum 
  yellowish 
  brown; 
  antennae 
  

   with 
  the 
  two 
  basal 
  segments 
  and 
  the 
  proximal 
  end 
  of 
  the 
  third 
  dull 
  

   yellow; 
  remainder 
  of 
  the 
  antennae 
  dark 
  brownisli-black, 
  clothed 
  with 
  

  

  