﻿HELEID 
  MIDGES, 
  GENUS 
  STILOBEZZIA 
  — 
  WIRTH 
  59 
  

  

  8 
  (7) 
  . 
  Three 
  dark 
  wing 
  spots 
  including 
  one 
  at 
  apex 
  of 
  first 
  radial 
  cell; 
  fifth 
  tarsal 
  

  

  segment 
  with 
  ventral 
  batonnets 
  15. 
  rabelloi 
  Lane 
  

  

  Two 
  dark 
  wing 
  spots, 
  none 
  at 
  apex 
  of 
  first 
  radial 
  cell; 
  fifth 
  tarsal 
  segment 
  

   without 
  ventral 
  batonnets 
  6. 
  beckae, 
  new 
  species 
  

  

  9 
  (5) 
  . 
  Mesonotum 
  entirely 
  polished 
  black 
  10 
  

  

  Mesonotum 
  yellow, 
  green, 
  or 
  brown, 
  not 
  entirely 
  black 
  13 
  

  

  10 
  (9). 
  Abdomen 
  pohshed 
  black 
  11 
  

  

  Abdomen 
  green 
  12 
  

  

  11 
  (10). 
  Midfemora 
  and 
  hind 
  femora 
  black 
  except 
  at 
  extreme 
  bases. 
  

  

  5. 
  antennalis 
  (Coquillett) 
  

   Legs 
  uniformly 
  yellow 
  7. 
  bicolor 
  Lane 
  

  

  12 
  (10). 
  Fifth 
  tarsal 
  segment 
  with 
  ventral 
  batonnets. 
  _ 
  10. 
  diversa 
  (Coquillett) 
  

  

  Fifth 
  tarsal 
  segment 
  without 
  ventral 
  batonnets. 
  

  

  12. 
  pallidiventris 
  (Malloch) 
  

  

  13 
  (9). 
  Shining 
  green; 
  third 
  or 
  fourth 
  abdominal 
  tergites 
  extensively 
  black. 
  14 
  

  

  Yellow 
  or 
  brown, 
  not 
  green; 
  abdomen 
  without 
  black 
  bands 
  or 
  spots. 
  15 
  

  

  14 
  (13). 
  Mesonotum 
  uniformly 
  pale 
  green; 
  distal 
  fourth 
  of 
  hind 
  femur 
  black. 
  

  

  18. 
  viridis 
  (Coquillett) 
  

  

  Mesonotum 
  largely 
  dark 
  brown; 
  hind 
  femur 
  with 
  only 
  spot 
  at 
  apex 
  

  

  black 
  11. 
  glauca 
  Macfie 
  

  

  15 
  (13). 
  Mesonotum 
  shining 
  brown; 
  wing 
  with 
  a 
  beadlike 
  swelling 
  near 
  apex 
  of 
  

  

  second 
  radial 
  cell 
  16. 
  sybleae, 
  new 
  species 
  

  

  Mesonotum 
  pruinose 
  brown; 
  wing 
  venation 
  normal 
  16 
  

  

  16 
  (15). 
  Mesonotum 
  dark 
  brown, 
  with 
  pattern 
  of 
  large 
  pruinose 
  gray 
  spots; 
  

  

  scutellum 
  dark; 
  tibiae 
  with 
  sub-basal 
  pale 
  rings.. 
  13. 
  pruinosa 
  Wirth 
  

   Mesonotum 
  uniform 
  light 
  grayish 
  brown; 
  tibiae 
  unbanded 
  17 
  

  

  17 
  (16). 
  Scutellum 
  and 
  femora 
  yellow 
  8. 
  bulla 
  Thomsen 
  

  

  Scutellum 
  and 
  femora 
  brown 
  17. 
  thomscnae, 
  new 
  species 
  

  

  Male 
  genitalia 
  

  

  1. 
  Lateral 
  sclerites 
  of 
  aedeagus 
  greatly 
  reduced 
  or 
  absent, 
  instead 
  a 
  trans- 
  

   verse 
  sclerite 
  between 
  inner 
  margins 
  of 
  basistyles 
  beyond 
  base 
  2 
  

  

  Lateral 
  sclerites 
  of 
  aedeagus 
  well 
  developed 
  and 
  oblique, 
  with 
  bases 
  at 
  

   inner 
  ventral 
  margins 
  of 
  basistyles 
  3 
  

  

  2 
  (1). 
  A 
  large 
  rounded 
  lobe 
  at 
  distal 
  third 
  of 
  inner 
  margins 
  of 
  basistyles; 
  

  

  transverse 
  sclerite 
  with 
  pointed, 
  curved 
  ends; 
  apicolateral 
  lobes 
  of 
  

  

  ninth 
  tergite 
  widely 
  spaced 
  and 
  triangular 
  8. 
  bulla 
  Thomsen 
  

  

  Basistyles 
  simple; 
  transverse 
  sclerite 
  with 
  blunt 
  ends; 
  apicolateral 
  lobes 
  

   fingerlike 
  and 
  close 
  together 
  17. 
  thomsenac, 
  new 
  species 
  

  

  3 
  (1). 
  Lateral 
  sclerites 
  of 
  aedeagus 
  sinuate, 
  irregularly 
  bent, 
  or 
  apex 
  forked; 
  

  

  basistyle 
  without 
  lobe, 
  or 
  if 
  one 
  present 
  it 
  bears 
  a 
  strong 
  spine; 
  apico- 
  

   lateral 
  lobes 
  of 
  ninth 
  tergite 
  usually 
  slender 
  and 
  close 
  together 
  4 
  

  

  Lateral 
  sclerites 
  of 
  aedeagus 
  straight, 
  at 
  least 
  on 
  distal 
  half; 
  basistyle 
  

   with 
  mesal 
  lobe; 
  apicolateral 
  lobes 
  usually 
  low 
  and 
  rounded 
  10 
  

  

  4 
  (3). 
  Basistyle 
  with 
  a 
  strong 
  spine 
  midway 
  on 
  inner 
  margin, 
  arising 
  from 
  a 
  low 
  

  

  lobe 
  also 
  bearing 
  a 
  fine 
  hair; 
  aedeagus 
  with 
  strong 
  subapical 
  tooth 
  

   on 
  outer 
  side, 
  appearing 
  forked 
  at 
  end; 
  parameres 
  long 
  and 
  slender 
  

  

  with 
  long 
  pointed 
  tips 
  2. 
  fuscula 
  Wirth 
  

  

  Basistyle 
  simple 
  ; 
  aedeagal 
  sclerites 
  without 
  strong 
  tooth 
  5 
  

  

  