﻿64 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  2. 
  Stilobezzia 
  {Neostilobezzia) 
  fuscula 
  Wirth, 
  1952 
  

  

  Figure 
  11, 
  e 
  

  

  Stilobezzia 
  fuscula 
  Wirth, 
  Univ. 
  California 
  Publ. 
  Ent., 
  vol. 
  9, 
  p. 
  204, 
  1952 
  ( 
  9 
  , 
  

   California) 
  . 
  

  

  Diagnostic 
  characters.— 
  This 
  species 
  resembles 
  S. 
  (N). 
  lutea 
  (Mal- 
  

   loch), 
  1918, 
  in 
  its 
  uniformly 
  yellowish 
  color, 
  unmarked 
  wings 
  with 
  

   macrotrichiae, 
  and 
  mesonotum 
  with 
  indistinctly 
  darker 
  vittae; 
  but 
  

   differs 
  in 
  being 
  somewhat 
  duller 
  and 
  darker, 
  with 
  dark 
  antennal 
  

   pedicel 
  and 
  halteres, 
  and 
  in 
  having 
  the 
  body 
  hairs 
  much 
  softer. 
  

  

  Description. 
  — 
  Female: 
  Length 
  1.4 
  mm., 
  wing 
  1.5 
  mm. 
  by 
  0.5 
  mm. 
  

   Head 
  grayish 
  brown 
  pruinose, 
  pedicel 
  of 
  antennae 
  and 
  palpi 
  brown, 
  

   antennal 
  flagellum 
  yellowish 
  brown; 
  segments 
  in 
  proportion 
  of 
  

   20 
  : 
  12 
  : 
  12 
  : 
  12 
  : 
  12 
  : 
  12 
  : 
  12 
  : 
  12 
  : 
  20 
  : 
  20 
  :20 
  : 
  20 
  : 
  30. 
  Palpal 
  segments 
  m 
  pro- 
  

   portion 
  of 
  4:8:15:10:10, 
  third 
  segment 
  with 
  three 
  long, 
  stalked 
  sen- 
  

   sillae. 
  

  

  Mesonotimi 
  dull 
  yellowish 
  brown, 
  with 
  coarse 
  pruinosity, 
  a 
  narrow 
  

   median 
  longitudinal 
  vitta 
  and 
  a 
  broad 
  patch 
  on 
  each 
  side 
  from 
  humeral 
  

   pits 
  to 
  wing 
  base 
  darker 
  brown; 
  most 
  of 
  bristles 
  removed, 
  but 
  those 
  

   few 
  remaining 
  long 
  and 
  dark 
  brown. 
  Scutellum 
  bright 
  yellow 
  in 
  

   middle, 
  brownish 
  on 
  sides, 
  apparently 
  with 
  four 
  marginal 
  bristles. 
  

   Postscutellum 
  and 
  plem'a 
  yellowish 
  brown 
  pruinose. 
  Legs 
  dull 
  dark 
  

   yellowish; 
  hairs 
  short, 
  except 
  row 
  of 
  long 
  bristles 
  on 
  outer 
  edge 
  of 
  hind 
  

   tibia; 
  inner 
  claw 
  as 
  long 
  as 
  fifth 
  tarsal 
  segment. 
  

  

  Wings 
  grayish 
  hyaline, 
  anterior 
  veins 
  brownish; 
  second 
  anterior 
  

   radial 
  cell 
  about 
  five 
  times 
  as 
  long 
  as 
  fu'st; 
  macrotrichiae 
  thick 
  at 
  apex 
  

   of 
  cell 
  R5 
  and 
  along 
  and 
  beyond 
  intercalary 
  fork, 
  a 
  few 
  also 
  along 
  tip 
  

   of 
  veins 
  Mi 
  and 
  M2 
  and 
  at 
  apex 
  of 
  cell 
  Mi. 
  Halteres 
  brown, 
  flat 
  end 
  of 
  

   knob 
  dull 
  yellowish. 
  

  

  Abdomen 
  dull 
  dark 
  brown, 
  a 
  patch 
  of 
  long 
  brown 
  hairs 
  on 
  sides 
  

   of 
  first 
  segment. 
  Spermathecae 
  two, 
  oval, 
  with 
  ducts 
  sclerotized 
  

   a 
  short 
  distance; 
  a 
  rudimentary 
  third 
  spermatheca 
  present. 
  

  

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

   antennal 
  plumes 
  hght 
  brown; 
  thorax 
  and 
  abdomen 
  infuscated 
  light 
  

   brown; 
  scutellum 
  yellow. 
  

  

  Ninth 
  sternite 
  about 
  three 
  times 
  as 
  broad 
  as 
  long, 
  with 
  mesal 
  

   posterior 
  excavation 
  halfway 
  to 
  base, 
  posterior 
  membrane 
  bare; 
  ninth 
  

   tergite 
  rather 
  long 
  and 
  rounded, 
  with 
  a 
  pair 
  of 
  long, 
  rounded, 
  seti- 
  

   gerous, 
  apicolateral 
  lobes. 
  Basistyle 
  nearly 
  three 
  times 
  as 
  long 
  as 
  

   broad, 
  with 
  a 
  black 
  spine 
  borne 
  on 
  a 
  small 
  lobe 
  with 
  a 
  long 
  fine 
  hau- 
  

   about 
  midway 
  of 
  mesal 
  margin; 
  dististyle 
  as 
  long 
  as 
  basistyle, 
  slender 
  

   and 
  slightly 
  curved 
  to 
  apex. 
  Aedeagus 
  with 
  a 
  pair 
  of 
  oblique, 
  lateral, 
  

   sclerotized 
  bars 
  with 
  median 
  apices 
  forked, 
  the 
  inner 
  arm 
  in 
  line 
  

   with 
  base 
  and 
  longer 
  than 
  the 
  other 
  arm. 
  Parameres 
  with 
  slender 
  

  

  