﻿82 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  of 
  costa 
  as 
  large 
  as 
  third 
  browTi 
  spot, 
  the 
  apex 
  of 
  the 
  wing 
  beyond 
  

   Hghtly 
  infuscated. 
  First 
  radial 
  cell 
  nearly 
  half 
  as 
  long 
  as 
  second, 
  the 
  

   latter 
  ending 
  at 
  about 
  0.7 
  wing 
  length; 
  petiole 
  of 
  media 
  about 
  as 
  long 
  

   as 
  first 
  radial 
  cell. 
  Halteres 
  brown 
  except 
  at 
  extreme 
  bases 
  of 
  stems. 
  

  

  Abdomen 
  dark 
  brown, 
  tergites 
  with 
  narrow, 
  apical, 
  segmental, 
  

   silvery 
  pruinose 
  bands; 
  vestitiu-e 
  very 
  dense, 
  consisting 
  of 
  long, 
  stout, 
  

   brown 
  hairs. 
  Spermathecae 
  two, 
  ovoid, 
  subequal, 
  with 
  ducts 
  sclero- 
  

   tized 
  a 
  short 
  distance, 
  and 
  a 
  rudimentary 
  third 
  present. 
  

  

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

   plumes 
  of 
  antennae 
  bro^\^l. 
  Ninth 
  sternite 
  about 
  three 
  times 
  as 
  

   broad 
  as 
  long, 
  with 
  shallow, 
  mesal, 
  posterior 
  excavation, 
  and 
  the 
  

   membrane 
  bare; 
  ninth 
  tergite 
  short 
  and 
  rounded 
  with 
  very 
  short, 
  

   setigerous, 
  apicolateral 
  lobes. 
  Basistyles 
  simple, 
  very 
  long, 
  slender 
  

   and 
  tapered 
  to 
  tips, 
  about 
  three 
  times 
  as 
  long 
  as 
  broad; 
  dististyles 
  

   about 
  0.8 
  as 
  long 
  as 
  basistjdes, 
  slightly 
  incurved, 
  slender, 
  with 
  pointed 
  

   apices. 
  Aedeagus 
  with 
  an 
  oblique 
  pair 
  of 
  double-sinuate 
  sclerites 
  

   with 
  mesal 
  tips 
  snoutlike. 
  Parameres 
  strongl}^ 
  sclerotized 
  with 
  

   broad, 
  winglike, 
  lateral 
  apodemes 
  at 
  bases, 
  a 
  lateral 
  pair 
  of 
  L-shaped 
  

   or 
  boomerang-shaped 
  lateral 
  plates 
  with 
  blunt 
  apices 
  directed 
  latero- 
  

   caudad, 
  and 
  a 
  submedian 
  pair 
  of 
  nearly 
  straight 
  processes 
  of 
  same 
  

   thickness, 
  but 
  about 
  twice 
  as 
  long, 
  with 
  pointed 
  apices. 
  

  

  Type. 
  — 
  -In 
  collection 
  University 
  of 
  Sao 
  Paulo, 
  Brazil, 
  cf, 
  Brazil, 
  

   Rio 
  de 
  Janeiro, 
  Estrada 
  Rio-Sao 
  Paulo, 
  km. 
  47. 
  

  

  Material 
  examined. 
  — 
  Georgia: 
  Thomasville, 
  ]May 
  15-30, 
  1949, 
  

   Palmer, 
  1 
  9. 
  

  

  Florida: 
  Leesburg, 
  Lake 
  County, 
  Aug, 
  7, 
  1949, 
  Braddock, 
  2 
  99; 
  

   Panama 
  City 
  Beach, 
  May 
  6, 
  1949, 
  McElvey, 
  3 
  cf 
  cf 
  , 
  1 
  9; 
  Santa 
  Rosa 
  

   Island, 
  Escambia 
  County, 
  June 
  7, 
  1949, 
  Butler, 
  1 
  cf 
  , 
  1 
  9. 
  

  

  Louisiana: 
  New 
  Orleans, 
  May 
  27, 
  1947, 
  Van 
  Beeck, 
  6 
  cf 
  cf 
  . 
  

  

  Honduras: 
  La 
  Ceiba, 
  Aug. 
  6, 
  1916, 
  Dyer, 
  1 
  cf 
  . 
  

  

  Surinam: 
  Moengo, 
  Nov. 
  10, 
  1947, 
  Stage, 
  1 
  9. 
  

  

  Remarks. 
  — 
  Closely 
  related 
  to 
  S. 
  (S.) 
  beckae, 
  new 
  species, 
  which 
  it 
  

   resembles 
  closely 
  in 
  the 
  bro\vn 
  mesonotum 
  with 
  silvery 
  pruinosity 
  and 
  

   strong 
  anterior 
  spinose 
  tubercle 
  and 
  brownish 
  infuscated 
  and 
  spotted 
  

   wings, 
  but 
  beckae 
  differs 
  in 
  lacking 
  the 
  third 
  dark 
  spot 
  at 
  apex 
  of 
  first 
  

   radial 
  cell 
  and 
  the 
  ventral 
  batonnets 
  on 
  fifth 
  tarsal 
  segment, 
  and 
  the 
  

   body 
  hairs 
  are 
  not 
  nearly 
  so 
  well 
  developed. 
  

  

  16. 
  Stilobezzia 
  {Stilobezzia) 
  sybleae, 
  new 
  species 
  

  

  Figure 
  12, 
  c 
  

  

  Diagnostic 
  characters. 
  — 
  A 
  small, 
  shining, 
  brown 
  species 
  with 
  dusky, 
  

   yellow 
  legs; 
  wing 
  hyaline 
  with 
  a 
  prominent 
  beadlike 
  swelling 
  of 
  vein 
  

   ^i+5 
  near 
  apex 
  of 
  second 
  radial 
  cell; 
  hind 
  tarsi 
  with 
  fifth 
  segment 
  and 
  

   claws 
  greatly 
  reduced. 
  

  

  