﻿NO. 
  19GG. 
  SYNOPSIS 
  OF 
  NEOTROPICAL 
  LniXOBINJE— 
  ALEXANDER. 
  521 
  

  

  Genus 
  SIGMATOMERA 
  Osten 
  Sacken. 
  

  

  Sigmatomera 
  Osten 
  Sacken, 
  Monographs, 
  vol. 
  4, 
  1869, 
  pp. 
  137, 
  138. 
  

  

  1. 
  Cell 
  first 
  Mg 
  distinct; 
  brown 
  crossband 
  on 
  the 
  wing 
  narrow, 
  confined 
  to 
  the 
  cord 
  

  

  (Mexico) 
  flavipennis 
  Osten 
  Sacken. 
  ^ 
  

  

  2. 
  Cell 
  first 
  M^ 
  not 
  distinct 
  (cross 
  vein 
  m 
  obliterated); 
  brown 
  crossband 
  broad; 
  base 
  

  

  and 
  tip 
  of 
  the 
  wing 
  brown 
  (Brazil) 
  amazonica 
  Westwood 
  .^ 
  

  

  No 
  representatives 
  of 
  this 
  genus 
  were 
  included 
  in 
  the 
  material 
  

   studied. 
  

  

  Genus 
  GNOPHOMYIA 
  Osten 
  Sacken. 
  

  

  Gnophomyia 
  Osten 
  Sacken, 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Phila., 
  1859, 
  p. 
  223. 
  

   Furina 
  J^ennicke, 
  Abhandl. 
  Senckenb, 
  Ges., 
  vol. 
  6, 
  1867, 
  p. 
  318. 
  — 
  Osten 
  

   Sacken, 
  Monographs, 
  vol. 
  4, 
  1869, 
  p. 
  172; 
  Studies, 
  etc., 
  pt. 
  2, 
  1887, 
  p. 
  198. 
  

  

  KEY 
  TO 
  THE 
  SPECIES 
  OP 
  GNOPHOMYIA. 
  

  

  1. 
  Cross 
  vein 
  m 
  absent 
  aperta 
  Coquillett* 
  (S. 
  W. 
  Canada). 
  

  

  Cross 
  vein 
  m 
  present 
  2. 
  

  

  2. 
  Wings 
  uniform 
  in 
  coloration 
  without 
  dark 
  fasciae 
  3. 
  

  

  Wings 
  light 
  colored 
  with 
  dark 
  fasciae, 
  or 
  dark 
  colored 
  with 
  white 
  fasciae 
  9. 
  

  

  3. 
  Wings 
  strongly 
  tinged 
  with 
  blackish 
  or 
  dark 
  brown, 
  uniform 
  4. 
  

  

  Wings 
  subhyaline, 
  or 
  very 
  slightly 
  darker 
  8. 
  

  

  4. 
  Halteres 
  with 
  the 
  knob 
  yellow 
  tristissima 
  Osten 
  Sacken* 
  (Eastern 
  U. 
  S.). 
  

  

  Halteres 
  entirely 
  dark 
  colored 
  5. 
  

  

  5. 
  Thoi-ax 
  black 
  6. 
  

  

  Thorax 
  orange 
  7. 
  

  

  6. 
  Small 
  species 
  (length 
  about 
  4 
  mm); 
  wings 
  infumed 
  with 
  violaceous; 
  stigma 
  

  

  brown 
  nigrina 
  Wiedemann^ 
  (Brazil) 
  . 
  

  

  Larger 
  species 
  (length 
  about 
  6-7 
  mm); 
  wings 
  nearly 
  black; 
  costal 
  cell 
  darker; 
  

   no 
  distinct 
  stigma 
  luctuosa 
  Osten 
  Sacken 
  (E. 
  U. 
  S. 
  ; 
  Cent. 
  Am.). 
  

  

  7. 
  Abdomen 
  black 
  rufithorax 
  Wiedemann 
  (Brazil). 
  

  

  Abdomen 
  orange 
  magnifica, 
  new 
  species 
  (Mexico). 
  

  

  8. 
  Dark 
  rust 
  red; 
  wings 
  uniformly 
  tinged 
  with 
  brown, 
  ferruginea 
  Williston^ 
  (Mexico). 
  

   Greyish 
  brown; 
  wings 
  very 
  faintly 
  tinged 
  with 
  brown; 
  an 
  indistinct 
  hyaline 
  

  

  cross 
  band 
  beyond 
  the 
  cord 
  subhyalina, 
  new 
  species 
  (Cent. 
  Am., 
  Brazil). 
  

  

  9. 
  Wings 
  subhyaline 
  with 
  two 
  brown 
  fasciae 
  10. 
  

  

  Wings 
  brown 
  with 
  two 
  subhyaline 
  crossbands. 
  

  

  caloptera 
  Osten 
  Sacken^ 
  (Brazil, 
  probably). 
  

  

  10. 
  Body, 
  halteres 
  and 
  legs 
  altogether 
  black 
  osten 
  sackeni 
  Skuse 
  ^ 
  (Brazil). 
  

  

  Body 
  light 
  yellow, 
  with 
  brown 
  marks 
  hirsuta, 
  new 
  species 
  (Brazil). 
  

  

  I 
  have 
  not 
  included 
  in 
  the 
  above 
  table, 
  Gnophomyia 
  (?) 
  stupens 
  

   Walker® 
  on 
  the 
  grounds 
  that 
  it 
  is 
  unrecognizable. 
  In 
  the 
  original 
  

   description, 
  the 
  venation 
  is 
  compared 
  to 
  a 
  TricypTiona, 
  but 
  Osten 
  

   Sacken 
  says 
  that 
  it 
  is 
  a 
  GnopJiomyia. 
  No 
  species 
  known 
  to 
  me 
  has 
  

  

  1 
  Monographs, 
  Dipt. 
  N. 
  Amer., 
  vol. 
  3, 
  p. 
  ix 
  (supplement, 
  Smiths. 
  Misc. 
  Coll., 
  No. 
  256 
  (1873)). 
  

  

  2 
  Trans. 
  Ent. 
  Soc. 
  Lond., 
  1881, 
  p. 
  366, 
  pi. 
  17, 
  fig. 
  3. 
  

  

  3 
  Joum. 
  N. 
  Y. 
  Ent. 
  Soc., 
  1905, 
  p. 
  58. 
  

  

  * 
  Monographs, 
  vol. 
  4, 
  p. 
  175, 
  pi. 
  2, 
  fig. 
  5 
  (wing); 
  male 
  and 
  female. 
  

  

  6 
  Auss. 
  Zweifl. 
  Ins., 
  1S2S, 
  vol. 
  1, 
  p. 
  37 
  {Limnobia). 
  

  

  6 
  Biologia 
  Centrali-Americana, 
  Diptera, 
  vol. 
  1 
  (supplement), 
  Dec, 
  1900, 
  p. 
  226, 
  female. 
  

  

  ' 
  Studies 
  on 
  Tipulidse, 
  pt. 
  2, 
  Berl. 
  Ent. 
  Zeit., 
  1887, 
  pp. 
  199, 
  200, 
  male 
  and 
  female. 
  

  

  8 
  Osten 
  Sacken, 
  Idem, 
  p. 
  200, 
  female. 
  

  

  9 
  Trans. 
  Ent. 
  Soc. 
  Lond., 
  new 
  ser., 
  vol. 
  5, 
  1860, 
  p. 
  333 
  {Limnobla). 
  

  

  