﻿PROCEEDINGS 
  OF 
  THE 
  UNITED 
  STATES 
  NATIONAL 
  MUSEUM 
  

  

  SMITHSONIAN 
  INSTITUTION 
  

   U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  Vol. 
  103 
  Washington 
  : 
  1953 
  No. 
  3316 
  

  

  BITING 
  MIDGES 
  OF 
  THE 
  HELEID 
  GENUS 
  STILOBEZZIA 
  IN 
  

  

  NORTH 
  AMERICA 
  

  

  By 
  Willis 
  W. 
  Wirth 
  ' 
  

  

  Siilobezzia 
  Kieffer, 
  1911, 
  is 
  a 
  rather 
  large, 
  widespread 
  genus 
  of 
  

   predaceous 
  midges 
  which 
  has 
  reached 
  its 
  greatest 
  development 
  in 
  

   the 
  warmer 
  parts 
  of 
  the 
  New 
  World. 
  For 
  North 
  America 
  11 
  species 
  

   are 
  listed 
  in 
  Johannsen's 
  recent 
  list 
  (1943b); 
  this 
  total 
  is 
  now 
  raised 
  

   to 
  18 
  by 
  the 
  present 
  new 
  records 
  and 
  species, 
  and 
  no 
  doubt 
  many 
  

   more 
  await 
  discovery. 
  The 
  species 
  of 
  Stilobezzia 
  are 
  rather 
  easily 
  

   characterized, 
  and 
  all 
  the 
  Nearctic 
  species 
  known 
  to 
  Johannsen 
  were 
  

   correctly 
  placed 
  by 
  him, 
  with 
  the 
  exception 
  of 
  S. 
  uncinata 
  Johannsen, 
  

   1943, 
  which 
  I 
  believe 
  to 
  represent 
  the 
  female 
  of 
  Parabezzia 
  petiolata 
  

   Malloch, 
  1915. 
  

  

  The 
  types 
  of 
  the 
  species 
  described 
  here 
  are 
  in 
  the 
  U. 
  S. 
  National 
  

   Museum, 
  the 
  collections 
  of 
  which 
  furnished 
  the 
  bulk 
  of 
  the 
  material 
  

   studied. 
  I 
  am 
  indebted 
  to 
  Dr. 
  Henry 
  K. 
  Townes, 
  of 
  North 
  Carolina 
  

   State 
  College, 
  for 
  the 
  loan 
  of 
  specimens 
  from 
  his 
  collection, 
  and 
  to 
  

   Mrs. 
  Elisabeth 
  C. 
  Beck 
  and 
  J. 
  A. 
  Mulrennan, 
  of 
  the 
  Florida 
  State 
  

   Department 
  of 
  Health, 
  for 
  their 
  kindness 
  in 
  sending 
  a 
  large 
  series 
  of 
  

   light 
  trap 
  collections 
  from 
  which 
  I 
  sorted 
  most 
  of 
  the 
  Florida 
  specimens. 
  

  

  Family 
  Heleidae 
  

  

  Genus 
  Stilobezzia 
  Kieflfer, 
  1911 
  

  

  Diagnosis. 
  — 
  Body 
  rather 
  slender 
  and 
  nearly 
  bare. 
  Eyes 
  bare. 
  

   Female 
  antenna 
  with 
  segments 
  3-10 
  oval, 
  11-15 
  long 
  and 
  cylindrical; 
  

  

  ' 
  Bureau 
  of 
  Entomology 
  and 
  Plant 
  Quarantine, 
  Agricultural 
  Research 
  Administration, 
  U. 
  S. 
  Depart' 
  

   ment 
  of 
  Agriculture. 
  

  

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