﻿HELEID 
  MIDGES, 
  GENUS 
  STILOBEZZIA 
  — 
  ^WIRTH 
  81 
  

  

  Most 
  closely 
  related 
  to 
  the 
  Neotropical 
  species 
  S. 
  (S.) 
  punctulata 
  

   Lane, 
  1947, 
  and 
  S. 
  (S.) 
  kiefferi 
  Lane, 
  1947, 
  which 
  it 
  resembles 
  in 
  its 
  

   spotted 
  wings 
  and 
  punctate 
  legs. 
  Both 
  related 
  species, 
  however, 
  

   have 
  the 
  abdomen 
  reddish, 
  the 
  former 
  species 
  differing 
  in 
  having 
  

   three 
  dark 
  wing 
  spots, 
  the 
  third 
  over 
  tip 
  of 
  second 
  radial 
  cell, 
  while 
  

   the 
  second 
  species 
  has 
  the 
  first 
  radial 
  cell 
  half 
  as 
  long 
  as 
  the 
  second, 
  

   yellowish 
  coxae, 
  whitish 
  halteres, 
  and 
  the 
  fore 
  femur 
  and 
  midfemur 
  

   lack 
  the 
  basal 
  dark 
  bands. 
  

  

  15. 
  Stilobezzia 
  {Stilobezzia) 
  rabelloi 
  Lane, 
  1947 
  

  

  Figure 
  11, 
  a 
  

  

  Stilobezzia 
  rabelloi 
  Lane, 
  Rev. 
  Ent., 
  vol. 
  18, 
  p. 
  203, 
  1947 
  (c?, 
  9 
  ; 
  Brazil). 
  

  

  Diagnostic 
  characters. 
  — 
  A 
  large, 
  brown 
  species 
  with 
  irregular, 
  

   silvery, 
  pruinose 
  markings; 
  wing 
  brownish, 
  infuscated 
  with 
  tlu-ee 
  

   darker 
  and 
  one 
  lighter 
  spots 
  on 
  anterior 
  margin; 
  body 
  hairs 
  dense 
  and 
  

   strong; 
  fifth 
  tarsal 
  segment 
  with 
  3 
  or 
  4 
  pairs 
  of 
  ventral 
  batonnets. 
  

  

  Description. 
  — 
  Female. 
  Length 
  3.0 
  mm., 
  wing 
  2.2 
  mm. 
  by 
  0.8 
  mm. 
  

   Head 
  pruinose 
  brown, 
  narrow 
  bases 
  of 
  flagellar 
  segments 
  yellow, 
  

   palpi 
  black. 
  Antenna 
  with 
  flagellar 
  segments 
  in 
  proportion 
  of 
  

   22:15:15:15:18:20:24:24:40:42:50:?:? 
  (last 
  two 
  segments 
  broken, 
  

   not 
  measured). 
  Palpal 
  segments 
  in 
  proportion 
  of 
  8:15:25:15:20, 
  

   third 
  segment 
  slightly 
  swollen, 
  densely 
  set 
  with 
  strong 
  hairs, 
  a 
  small, 
  

   round 
  pit 
  near 
  apex. 
  

  

  Mesonotum 
  with 
  strong, 
  conical, 
  anterior 
  spine, 
  the 
  sides 
  sloping, 
  

   flattened 
  only 
  in 
  prescutellar 
  area; 
  color 
  dark 
  brown 
  with 
  irregular 
  

   silvery 
  pruinose 
  markings, 
  usually 
  three 
  sublateral 
  pairs 
  of 
  small, 
  

   rounded, 
  polished 
  spots 
  on 
  disc; 
  humeral 
  corners 
  yellowish; 
  a 
  few 
  long, 
  

   brown 
  hairs 
  in 
  row. 
  Scutellum 
  brown, 
  yellowish 
  in 
  middle, 
  with 
  

   4 
  or 
  5 
  long, 
  brown, 
  marginal 
  bristles. 
  Postscutellum 
  and 
  pleura 
  dark, 
  

   pollinose 
  brown. 
  Legs 
  including 
  coxae 
  dark 
  brown; 
  fore 
  femur 
  and 
  

   midfemur 
  with 
  narrow 
  sub-basal 
  and 
  subapical 
  and 
  broad 
  median 
  

   yellowish 
  bands; 
  hind 
  femur 
  with 
  narrow, 
  light 
  band 
  at 
  apex; 
  fore 
  

   tibia 
  and 
  midtibia 
  with 
  narrow 
  sub-basal 
  and 
  broad 
  median 
  yellowish 
  

   bands; 
  first 
  four 
  tarsal 
  segments 
  yellowish. 
  Proportions 
  of 
  segments 
  

   of 
  hind 
  leg 
  as 
  in 
  table 
  1 
  ; 
  leg 
  hairs 
  strong 
  and 
  spinose, 
  especially 
  long 
  

   on 
  hind 
  tibia; 
  basitarsus 
  with 
  strong 
  black 
  basal 
  and 
  apical 
  spines, 
  a 
  

   third 
  spine 
  in 
  middle 
  on 
  forelegs; 
  fifth 
  segment 
  with 
  3 
  or 
  4 
  pairs 
  of 
  

   ventral 
  batonnets; 
  claws 
  very 
  slender 
  and 
  unequal, 
  the 
  longer 
  claw 
  

   as 
  long 
  as 
  fifth 
  segment, 
  the 
  other 
  a 
  third 
  as 
  long. 
  

  

  Wing 
  brownish 
  hyaline, 
  extensively 
  infuscated 
  along 
  the 
  veins; 
  

   three 
  dark 
  brown 
  spots, 
  first 
  over 
  r-m 
  crossvein, 
  second 
  over 
  vein 
  

   R2+3, 
  and 
  the 
  third 
  over 
  distal 
  third 
  of 
  second 
  radial 
  cell 
  and 
  extending 
  

   halfway 
  through 
  cell 
  Rj 
  at 
  same 
  level; 
  a 
  light 
  area 
  just 
  beyond 
  tip 
  

  

  