﻿HELEID 
  MIDGES, 
  GENUS 
  STILOBEZZIA 
  — 
  WIRTH 
  75 
  

  

  Louisiana: 
  Baton 
  Rouge, 
  Apr. 
  19, 
  1947, 
  Wirth, 
  1 
  cf 
  ; 
  Kilbourne, 
  

   May 
  10, 
  1947, 
  Wii-th, 
  1 
  9. 
  

  

  9. 
  Stilobezzia 
  {Stilobezzia) 
  coquilletti 
  Kieffer, 
  1905 
  

  

  Figure 
  11, 
  h 
  

  

  Ceratopogon 
  pidus 
  Coquillett, 
  Journ. 
  New 
  York 
  Ent. 
  Soc, 
  vol. 
  13, 
  p. 
  60, 
  1905 
  

  

  (9, 
  Virginia). 
  

   Hartomyia 
  picta, 
  Malloch, 
  1915, 
  Bull. 
  Illinois 
  State 
  Lab. 
  Nat. 
  Hist., 
  vol. 
  10, 
  p. 
  

  

  341, 
  1915 
  (c?, 
  Illinois). 
  

   Stilobezzia 
  coquilletti 
  Kieffer, 
  Ann. 
  Mas. 
  Nat. 
  Hungarici, 
  vol. 
  15, 
  p. 
  308, 
  1917 
  

  

  (new 
  name 
  for 
  C. 
  picta 
  Coquillett 
  not 
  Meigen). 
  — 
  Johannsen, 
  Ann. 
  Ent. 
  Soc. 
  

  

  Amer., 
  vol. 
  36, 
  p. 
  781, 
  1943. 
  

  

  Description. 
  — 
  Female: 
  Length 
  2.0 
  mm., 
  wing 
  2.0 
  mm. 
  by 
  0.8 
  mm. 
  

   Yellow, 
  in 
  some 
  specimens 
  with 
  greenish 
  tinge; 
  with 
  a 
  pair 
  of 
  widely 
  

   separated, 
  narrow 
  brown 
  lines 
  from 
  anterior 
  median 
  point 
  of 
  meso- 
  

   notum 
  to 
  ends 
  of 
  scutellum; 
  also, 
  narrow 
  center 
  of 
  scutellum, 
  palpi, 
  

   mesopleiu"on 
  and 
  midcoxa, 
  narrow 
  apices 
  of 
  hind 
  femur 
  and 
  tibia, 
  

   fifth 
  tarsal 
  segment, 
  and 
  fore, 
  lateral, 
  and 
  hind 
  margins 
  of 
  abdominal 
  

   tergites 
  3 
  to 
  7, 
  brown. 
  Wing 
  bare 
  and 
  hyaline, 
  all 
  veins 
  brownish, 
  a 
  

   brown 
  spot 
  over 
  first 
  radial 
  cell 
  including 
  Ri 
  and 
  r-m 
  crossvein; 
  a 
  

   second 
  spot 
  over 
  apex 
  of 
  second 
  radial 
  cell 
  and 
  below 
  halfway 
  across 
  

   cell 
  R5; 
  knobs 
  of 
  halteres 
  brown. 
  

  

  Flagellar 
  segments 
  of 
  antenna 
  in 
  proportion 
  of 
  25 
  :15: 
  15:15:15:15: 
  

   17:18:28:28:30:30:60. 
  Palpal 
  segments 
  in 
  proportion 
  of 
  4:15:20: 
  

   10:22, 
  third 
  segment 
  not 
  swollen, 
  pit 
  absent. 
  Mesonotum 
  and 
  

   abdomen 
  with 
  coarse, 
  dark 
  bristles. 
  Proportions 
  of 
  segments 
  of 
  hind 
  

   leg 
  as 
  in 
  table 
  1 
  ; 
  basitarsi 
  without 
  spines, 
  fifth 
  segment 
  with 
  a 
  pair 
  of 
  

   long, 
  black 
  batonnets 
  at 
  basal 
  third; 
  claws 
  slender 
  and 
  unequal, 
  the 
  

   longer 
  as 
  long 
  as 
  fifth 
  segment, 
  the 
  other 
  about 
  half 
  as 
  long. 
  Sper- 
  

   matheca 
  one, 
  large 
  and 
  ovoid, 
  the 
  duct 
  not 
  sclerotized. 
  Wing 
  with 
  

   macro 
  trichiae 
  absent; 
  first 
  radial 
  cell 
  very 
  small 
  and 
  narrow, 
  about 
  a 
  

   seventh 
  as 
  long 
  as 
  second, 
  latter 
  to 
  0.8 
  wing 
  length; 
  crossvein 
  r-m 
  

   forming 
  an 
  oblique 
  line 
  with 
  vein 
  Ri 
  ; 
  media 
  petiolate 
  for 
  0.23 
  its 
  length. 
  

  

  Male: 
  Similar 
  to 
  the 
  female 
  but 
  with 
  the 
  usual 
  sexual 
  differences; 
  

   body 
  more 
  or 
  less 
  greenish 
  with 
  black 
  markings 
  as 
  in 
  female 
  , 
  antennal 
  

   plumes 
  yellow 
  at 
  bases, 
  black 
  on 
  distal 
  halves. 
  Ninth 
  sternite 
  a 
  

   narrow, 
  transverse, 
  anterior 
  band, 
  posterior 
  membrane 
  spiculate; 
  

   ninth 
  tergite 
  full 
  and 
  rounded, 
  with 
  a 
  pair 
  of 
  low, 
  rounded, 
  setigerous, 
  

   apicolateral 
  lobes. 
  Basistyle 
  about 
  twice 
  as 
  long 
  as 
  broad 
  at 
  base, 
  ab- 
  

   ruptly 
  narrowed 
  about 
  midway 
  on 
  inner 
  side, 
  forming 
  a 
  low, 
  mesal 
  lobe 
  

   connected 
  by 
  an 
  irregular 
  membrane 
  to 
  ventrolateral 
  margins 
  of 
  ninth 
  

   tergite; 
  dististyle 
  about 
  0.7 
  as 
  long 
  as 
  basistyle, 
  stout, 
  slightly 
  incurved, 
  

   with 
  bluntly 
  pointed 
  tip. 
  Aedeagus 
  with 
  an 
  oblique 
  pair 
  of 
  spatulate 
  

   sclerites 
  with 
  bases 
  abruptly 
  bent 
  laterad 
  around 
  bases 
  of 
  basistyles. 
  

   Parameres 
  a 
  pair 
  of 
  broad, 
  flattened, 
  sclerotized 
  plates, 
  bases 
  connected 
  

   across 
  mid^^ne 
  by 
  a 
  highly 
  sclerotized 
  band 
  from 
  outer 
  anterolateral 
  

  

  