﻿246 
  PROF. 
  M. 
  BEZZI. 
  

  

  small, 
  short, 
  attenuated 
  apically 
  but 
  with, 
  rounded 
  tip 
  ; 
  arista 
  with 
  rather 
  long 
  

   pubescence, 
  but 
  the 
  breadth 
  of 
  feathering 
  narrower 
  than 
  the 
  breadth 
  of 
  the 
  third 
  

   antennal 
  joint. 
  Palpi 
  and 
  proboscis 
  short, 
  yellowish, 
  pale-haired. 
  All 
  the 
  

   cephalic 
  bristles 
  are 
  black 
  and 
  rather 
  thin 
  ; 
  ocp. 
  well 
  developed 
  and 
  acute 
  ; 
  pvt. 
  

   parallel 
  ; 
  outer 
  vt. 
  half 
  as 
  long 
  as 
  the 
  inner 
  ones 
  ; 
  oc. 
  short 
  and 
  thin 
  ; 
  two 
  s. 
  or. 
  

   and 
  three 
  i. 
  or. 
  ; 
  genal 
  bristle 
  well 
  developed. 
  Thorax 
  reddish 
  yellow 
  on 
  the 
  back, 
  

   very 
  little 
  shining, 
  with 
  faint 
  whitish 
  dust 
  and 
  short 
  dark 
  pubescence 
  ; 
  the 
  pleurae 
  

   are 
  paler 
  and 
  more 
  shining, 
  with 
  scattered 
  longer 
  dark 
  hairs. 
  All 
  the 
  bristles 
  

   are 
  black 
  ; 
  chaetotaxy 
  complete 
  ; 
  scp. 
  well 
  developed, 
  the 
  middle 
  ones 
  approxi- 
  

   mated 
  ; 
  dc. 
  placed 
  much 
  behind 
  the 
  line 
  of 
  the 
  a. 
  sa. 
  and 
  near 
  to 
  the 
  jrrsct. 
  ; 
  only 
  

   one 
  strong 
  mpl. 
  ; 
  jot. 
  as 
  strong 
  as 
  the 
  st. 
  Scutellum 
  triangular, 
  as 
  long 
  as 
  broad, 
  

   flat 
  above, 
  with 
  lateral 
  keels 
  ; 
  it 
  is 
  coloured 
  like 
  the 
  back 
  of 
  the 
  mesonotum, 
  but 
  

   is 
  more 
  bare 
  and 
  shining; 
  it 
  has 
  four 
  black 
  bristles, 
  the 
  apical 
  ones 
  being 
  shorter 
  

   and 
  decussate. 
  Squamulae 
  and 
  halteres 
  pale 
  yellowish 
  ; 
  the 
  former 
  with 
  a 
  short 
  

   thin 
  white 
  fringe. 
  Postscutellum 
  and 
  mesophragma 
  entirely 
  reddish 
  yellow 
  and 
  

   shining. 
  Abdomen 
  of 
  usual 
  shape, 
  as 
  broad 
  as 
  the 
  thorax 
  towards 
  the 
  middle; 
  

   it 
  is 
  shining 
  reddish 
  yellow, 
  but 
  sometimes 
  very 
  infuscated 
  in 
  the 
  male 
  and 
  even 
  

   brownish 
  or 
  blackish 
  ; 
  the 
  pubescence 
  and 
  terminal 
  bristles 
  are 
  black 
  ; 
  venter 
  

   more 
  yellowish, 
  with 
  faint 
  pale 
  dust. 
  Male 
  genitalia 
  shaped 
  as 
  mfossata, 
  with 
  a 
  

   pair 
  of 
  long 
  and 
  stout 
  appendages, 
  the 
  basal 
  one 
  reddish, 
  while 
  the 
  apical 
  one 
  is 
  

   black, 
  and 
  longer 
  and 
  stouter. 
  Ovipositor 
  with 
  the 
  basal 
  segment 
  broadly 
  

   triangular, 
  shining 
  black, 
  the 
  apical 
  segment 
  narrow 
  and 
  dark 
  reddish; 
  the 
  contrast 
  

   between 
  the 
  reddish 
  abdomen 
  and 
  the 
  black 
  ovipositor 
  is 
  very 
  striking. 
  Legs 
  

   rather 
  slender, 
  entirely 
  yellowish 
  ; 
  front 
  femora 
  with 
  3-4 
  long 
  black 
  bristles 
  beneath 
  

   at 
  the 
  end 
  ; 
  middle 
  tibiae 
  without 
  bristles, 
  with 
  one 
  black 
  spur 
  at 
  the 
  end 
  ; 
  hind 
  

   tibiae 
  with 
  no 
  distinct 
  row. 
  Wings 
  shining 
  and 
  iridescent, 
  with 
  non-ciliated 
  costa 
  

   and 
  with 
  a 
  short 
  but 
  distinct 
  costal 
  bristle. 
  The 
  veins 
  are 
  yellowish 
  at 
  base 
  and 
  

   on 
  the 
  hyaline 
  parts, 
  black 
  on 
  the 
  rest 
  ; 
  the 
  second 
  longitudinal 
  vein 
  is 
  a 
  little 
  

   sinuous 
  ; 
  the 
  third 
  vein 
  is 
  bristly 
  throughout 
  its 
  whole 
  length 
  ; 
  the 
  second, 
  third 
  

   and 
  fourth 
  veins 
  are 
  equally 
  divergent 
  towards 
  the 
  apex, 
  ending 
  at 
  equal 
  distances 
  ; 
  

   the 
  last 
  portion 
  of 
  the 
  fourth 
  vein 
  is 
  straight 
  ; 
  the 
  small 
  cross- 
  vein 
  is 
  placed 
  beyond 
  

   the 
  middle 
  of 
  the 
  discoidal 
  cell 
  ; 
  the 
  hind 
  cross- 
  vein 
  is 
  straight, 
  perpendicular, 
  

   a 
  little 
  longer 
  than 
  its 
  distance 
  from 
  the 
  small 
  one 
  ; 
  inferior 
  angle 
  of 
  the 
  anal 
  cell 
  

   produced, 
  long 
  and 
  narrow, 
  but 
  not 
  longer 
  than 
  the 
  second 
  basal 
  cell 
  ; 
  sixth 
  

   longitudinal 
  vein 
  complete. 
  The 
  base 
  of 
  the 
  wing 
  is 
  yellowish 
  in 
  the 
  basal 
  and 
  

   costal 
  cells, 
  even 
  the 
  brown 
  stigma 
  being 
  yellow 
  at 
  base. 
  The 
  pattern 
  is 
  blackish 
  

   brown 
  and 
  about 
  the 
  same 
  as 
  mfossata 
  (vide 
  Bezzi, 
  Mem. 
  Ind. 
  Mus., 
  iii, 
  1913, 
  

   pi. 
  ix, 
  fig. 
  48), 
  which 
  however 
  has 
  the 
  wings 
  distinctly 
  broader. 
  

  

  Type 
  (J, 
  type 
  $, 
  and 
  some 
  additional 
  specimens 
  of 
  both 
  sexes 
  from 
  Nyasaland, 
  

   Chiromo, 
  Ruo 
  R, 
  2.i.l917 
  {R. 
  C. 
  Wood). 
  

  

  Acidia 
  homogenea. 
  sp. 
  nov. 
  

  

  A 
  black 
  species, 
  with 
  a 
  wing 
  pattern 
  very 
  like 
  that 
  of 
  the 
  European 
  A. 
  caesio 
  y 
  

   but 
  at 
  once 
  distinguished 
  from 
  it 
  and 
  from 
  the 
  other 
  species 
  by 
  the 
  discoidal 
  and 
  

   third 
  posterior 
  cells 
  being 
  completely 
  infuscated, 
  without 
  hyaline 
  spots 
  or 
  streaks. 
  

  

  §. 
  Length 
  of 
  body 
  4 
  mm. 
  ; 
  of 
  wing 
  4 
  mm. 
  ; 
  of 
  ovipositor 
  0*6 
  mm. 
  

  

  