﻿NO. 
  1966. 
  SYNOPSIS 
  OF 
  NEOTROPICAL 
  LIMNOBINM— 
  ALEXANDER. 
  513 
  

  

  KEY 
  TO 
  THE 
  SPECIES 
  OF 
  MESOCYPHONA 
  — 
  COntinUed- 
  

  

  6. 
  Spots 
  on 
  the 
  wings 
  scanty, 
  twenty 
  or 
  less 
  eiseni, 
  new 
  species 
  (C. 
  Amer.). 
  

  

  Spots 
  on 
  the 
  wing 
  numerous 
  7. 
  

  

  7. 
  Mesonotum 
  with 
  a 
  dark 
  line 
  on 
  either 
  side 
  of 
  the 
  pale 
  median 
  vitta; 
  tuberculate 
  

  

  pits 
  between 
  the 
  dark 
  lines 
  8. 
  

  

  Mesonotum 
  with 
  three 
  very 
  narrow 
  dark 
  lines; 
  the 
  median 
  one 
  passing 
  between 
  

   the 
  tuberculate 
  pita 
  costalis, 
  new 
  species 
  (C. 
  Amer., 
  Cuba). 
  

  

  8. 
  Mesonotum 
  clear 
  gray; 
  pleural 
  stripes 
  clear-cut, 
  distinct. 
  

  

  distincta 
  Alexander 
  ' 
  (Southwest. 
  U. 
  S.). 
  

   Mesonotum 
  yellowish; 
  pleural 
  stripes 
  not 
  clear-cut; 
  indistinct 
  9. 
  

  

  9. 
  Spots 
  on 
  the 
  wings 
  not 
  occurring 
  in 
  the 
  cells; 
  femora 
  with 
  a 
  subapical 
  brown 
  band 
  

  

  only 
  dulcis 
  Osten 
  Sacken 
  ^ 
  (West. 
  U. 
  S.). 
  

  

  Spots 
  on 
  the 
  wings 
  numerous 
  inside 
  the 
  cells; 
  femora 
  with 
  a 
  medial 
  and 
  subapical 
  

   brown 
  band 
  (caloptera 
  group) 
  10. 
  

  

  10. 
  Lighter 
  colored 
  northern 
  form; 
  hind 
  femora 
  with 
  the 
  post-medial 
  yellow 
  band 
  as 
  

  

  wide 
  as 
  the 
  subapical 
  dark 
  band, 
  

  

  caloptera 
  caloptera 
  Osten 
  Sacken 
  ^ 
  (East. 
  U. 
  S.). 
  

   Tark 
  southern 
  form; 
  hind 
  femora 
  with 
  the 
  post-medial 
  yellow 
  band 
  much 
  narrower 
  

   than 
  the 
  subapical 
  dark 
  band, 
  

  

  caloptera 
  Jemoranigr 
  a, 
  new 
  subspecies 
  (Cent. 
  Amer.). 
  

  

  11. 
  Femora 
  with 
  a 
  single 
  dark 
  subapical 
  band, 
  

  

  wnnaculata, 
  new 
  species 
  (Mexico, 
  Cent. 
  Amer.). 
  

   Femora 
  with 
  two 
  dark 
  bands 
  hicinctipes, 
  new 
  species 
  (Brazil). 
  

  

  ERIOPTERA 
  (MESOCYPHONA) 
  ANNULIPES 
  Williston. 
  

  

  Erioptera 
  annulipcs 
  Williston, 
  Trans. 
  Ent. 
  Soc. 
  Lond., 
  1896, 
  p. 
  294, 
  female 
  — 
  

   Hunter, 
  Trans. 
  Amer. 
  Ent. 
  Soc, 
  1900, 
  p. 
  290. 
  — 
  Kertesz, 
  Catalogus 
  Dip- 
  

   terorum, 
  vol. 
  2, 
  1902, 
  p. 
  200.— 
  Aldrich, 
  Cat. 
  N. 
  Amer. 
  Dipt., 
  1905, 
  p. 
  84.— 
  

   Enderlein, 
  Zool. 
  Jahrbuch, 
  1912, 
  pp. 
  54, 
  55, 
  fig. 
  Gl, 
  female. 
  

  

  Male. 
  — 
  Head: 
  rostrum 
  and 
  palpi 
  brown; 
  antennse 
  brown; 
  front, 
  

   vertex 
  and 
  occiput 
  clear 
  light 
  gray. 
  

  

  Thorax: 
  mesonotal 
  prsescutum 
  light 
  brown; 
  dorsal 
  stripes 
  very 
  

   indistinct, 
  close 
  together; 
  pseudosuture 
  shallow, 
  elongate, 
  pale, 
  

   tuberculate 
  tips 
  black, 
  close 
  together, 
  the 
  space 
  between 
  them 
  about 
  

   equal 
  to 
  the 
  diameter 
  of 
  one; 
  scutum 
  and 
  post-notum 
  similar 
  to 
  

   prsescutum; 
  scutellum 
  pallid, 
  yellowish, 
  with 
  two 
  iiidistinct 
  dorsal 
  

   lines. 
  Pleurae 
  Ught 
  brown, 
  stripes 
  indistinct, 
  the 
  pale 
  white 
  band 
  

   between 
  the 
  second 
  and 
  third 
  dark 
  stripe, 
  indistinct, 
  narrow 
  ; 
  sternum 
  

   whitish. 
  Halteres 
  white 
  throughout. 
  Hind 
  leg: 
  coxa 
  and 
  trochanter 
  

   pale 
  yellow; 
  femur 
  long, 
  white, 
  with 
  four 
  blackish-brown 
  rings, 
  sub- 
  

   basal, 
  premedian, 
  post-median, 
  and 
  subapical, 
  the 
  last 
  broadest; 
  tibia 
  

   white 
  with 
  three 
  rings, 
  subbasal, 
  median, 
  and 
  subapical, 
  the 
  last 
  

   narrowest; 
  first 
  tarsal 
  segment 
  black 
  at 
  base 
  and 
  tip; 
  segments 
  3 
  to 
  

   5 
  all 
  black. 
  Middle 
  leg 
  similar 
  to 
  hind 
  leg, 
  but 
  first 
  femoral 
  band 
  is 
  

   very 
  small, 
  indistinct, 
  the 
  others 
  gradually 
  wider. 
  Fore 
  leg, 
  similar 
  

   to 
  hind 
  leg, 
  but 
  only 
  three 
  femoral 
  bands. 
  

  

  1 
  Psyche, 
  vol. 
  19, 
  Dec, 
  1912, 
  pp. 
  165, 
  166. 
  

  

  2 
  Western 
  Diptera, 
  Bull. 
  U. 
  S. 
  Geol. 
  Surv., 
  vol. 
  3, 
  No. 
  2, 
  pp. 
  198, 
  199 
  (April, 
  1877). 
  

   « 
  Monographs, 
  vol. 
  4, 
  pp. 
  161, 
  162, 
  male 
  and 
  female. 
  

  

  69077°— 
  Proc.N.M.TOl.44— 
  13 
  33 
  

  

  