﻿HELEID 
  MIDGES, 
  GENUS 
  STILOBEZZIA 
  — 
  WIRTH 
  69 
  

  

  third 
  the 
  length 
  of 
  Mi. 
  Spermathecae 
  two, 
  the 
  larger 
  oval, 
  the 
  

   smaller 
  subspherical 
  and 
  a 
  third 
  the 
  diameter 
  of 
  other, 
  a 
  minute 
  

   vestigial 
  third 
  present. 
  

  

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

   plumes 
  of 
  antennae 
  brown. 
  Ninth 
  sternite 
  a 
  narrow 
  transverse 
  ante- 
  

   rior 
  band, 
  the 
  membrane 
  spiculate; 
  ninth 
  tergite 
  evenly 
  rounded 
  

   caudad, 
  the 
  apicolateral 
  lobes 
  not 
  prominent. 
  Basis 
  tyle 
  with 
  large 
  

   irregular 
  lobe 
  on 
  inner 
  side 
  to 
  distal 
  third; 
  dististyle 
  rather 
  strongly 
  

   bent 
  past 
  middle 
  and 
  tapered 
  to 
  pointed 
  tip. 
  Aedeagus 
  with 
  a 
  pair 
  

   of 
  oblique, 
  straight, 
  sclerotized 
  bars 
  with 
  distal 
  apices 
  scarcely 
  meet- 
  

   ing. 
  Parameres 
  a 
  pair 
  of 
  strongly 
  sclerotized, 
  large, 
  strongly 
  sinuate 
  

   rods 
  with 
  pointed 
  apices 
  and 
  large 
  basal 
  knobs. 
  

  

  Type.—USNM 
  5481, 
  9, 
  District 
  of 
  Columbia. 
  

  

  Material 
  examined. 
  — 
  New 
  York: 
  Ithaca, 
  June 
  11, 
  1935, 
  H. 
  K. 
  

   Townes, 
  1 
  9; 
  Rome, 
  June 
  24, 
  1934, 
  H. 
  K. 
  Townes, 
  1 
  d'. 
  

  

  New 
  Jersey: 
  Moorestown, 
  June 
  6, 
  1939, 
  H. 
  and 
  M. 
  Townes, 
  1 
  c?. 
  

  

  Maryland: 
  Dorchester, 
  July 
  10, 
  1907, 
  Barber, 
  1 
  9; 
  Mayo, 
  July 
  22, 
  

   1950, 
  Wirth, 
  2 
  cf 
  cf, 
  1 
  9; 
  Plummer's 
  Island, 
  June 
  30, 
  1914, 
  Shannon, 
  

  

  1 
  9, 
  and 
  Aug. 
  18, 
  1913, 
  Viereck, 
  1 
  9. 
  

  

  District 
  of 
  Columbia: 
  June, 
  1 
  9 
  (type) 
  ; 
  Benning's, 
  July 
  21, 
  Aldrich, 
  

  

  2 
  99. 
  

  

  Virginia: 
  June 
  IG, 
  1903, 
  Pergande, 
  2 
  cfcf, 
  3 
  99; 
  Dead 
  Run, 
  June 
  

   22, 
  1915, 
  Shannon, 
  1 
  9, 
  Falls 
  Church, 
  July 
  4, 
  8, 
  1950, 
  Wu'th, 
  3 
  c^ 
  d', 
  

   4 
  99. 
  

  

  Michigan: 
  Midland 
  County, 
  July 
  17, 
  1944, 
  Dreisbach, 
  1 
  9; 
  Traverse 
  

   City, 
  June 
  17, 
  1943, 
  Sabrosky, 
  1 
  cf. 
  

  

  lUinois: 
  Freeport, 
  July 
  4, 
  1917, 
  Malloch, 
  3 
  cf 
  cf; 
  Galena 
  Junction, 
  

   July 
  8, 
  1917, 
  Malloch, 
  1 
  9; 
  White 
  Heath, 
  June 
  4, 
  1939, 
  Dirks, 
  1 
  9. 
  

  

  Tennessee: 
  Ivnoxville, 
  May 
  25, 
  Aldrich, 
  1 
  9. 
  

  

  Mississippi: 
  West 
  Point, 
  Aug. 
  11, 
  1904, 
  Barber, 
  1 
  cf. 
  

  

  Louisiana: 
  Baton 
  Rouge, 
  May 
  4, 
  16, 
  1947, 
  Wirth, 
  4 
  cf 
  cf, 
  8 
  99. 
  

  

  6. 
  Stilobezzia 
  {StUobezsia') 
  beckae, 
  new 
  species 
  

  

  Figure 
  11, 
  / 
  

  

  Diagnostic 
  characters. 
  — 
  A 
  large, 
  dark 
  brown 
  species 
  with 
  silvery 
  

   pruinose 
  pattern 
  on 
  mesonotum 
  and 
  abdomen; 
  wing 
  with 
  two 
  darker 
  

   and 
  one 
  lighter 
  spots 
  on 
  anterior 
  margin; 
  knobs 
  of 
  hal 
  teres 
  black; 
  

   mesonotum 
  with 
  strong 
  anterior 
  tubercle; 
  fifth 
  tarsal 
  segment 
  

   unspined. 
  

  

  Description. 
  — 
  Female: 
  Length 
  2.5 
  mm., 
  wing 
  1.8 
  mm. 
  b}^ 
  0.7 
  mm. 
  

   Head 
  black 
  with 
  dense 
  whitish 
  pruinosity, 
  antennae 
  brown, 
  bases 
  of 
  

   flagellar 
  segments 
  3 
  to 
  10 
  yellowish; 
  palpi 
  dark 
  brown. 
  Flagellar 
  

   segments 
  of 
  antenna 
  in 
  proportion 
  of 
  16:12:15:20:20:20:20:22:28: 
  

  

  