﻿262 
  PROF. 
  M. 
  BEZZT. 
  

  

  hairs 
  ; 
  third 
  joint 
  broad, 
  rounded 
  at 
  tip, 
  about 
  twice 
  the 
  second 
  in 
  length 
  ; 
  arista 
  

   microscopically 
  pubescent. 
  Palpi 
  pale 
  yellowish, 
  with 
  pale 
  hairs 
  ; 
  they 
  are 
  very 
  

   Jong 
  and 
  broad, 
  flattened, 
  as 
  long 
  as 
  the 
  basal 
  part 
  of 
  the 
  proboscis 
  ; 
  the 
  latter 
  

   is 
  very 
  long, 
  about 
  as 
  long 
  as 
  the 
  head 
  and 
  thorax 
  together 
  ; 
  its 
  basal 
  part 
  is 
  pro- 
  

   duced 
  much 
  beyond 
  the 
  mouth-border, 
  and 
  the 
  apical 
  part 
  is 
  acute 
  and 
  much 
  produced 
  

   behind 
  the 
  chin. 
  Bristles 
  abraded 
  in 
  the 
  type, 
  but 
  they 
  seem 
  to 
  be 
  whitish 
  on 
  the 
  

   occipital 
  border 
  and 
  black 
  on 
  the 
  frons 
  ; 
  pubescence 
  pale 
  yellowish. 
  Thorax 
  

   clothed 
  on 
  the 
  back 
  with 
  a 
  dense 
  opaque 
  whitish-grey 
  dust, 
  but 
  with 
  a 
  very 
  broad 
  

   even 
  longitudinal 
  blackish 
  stripe, 
  which 
  extends 
  laterally 
  to 
  the 
  dc. 
  ; 
  a 
  smaller 
  

   lateral 
  blackish 
  stripe 
  on 
  each 
  side 
  above 
  the 
  notopleural 
  line 
  ; 
  the 
  back 
  can 
  

   therefore 
  be 
  described 
  as 
  black 
  with 
  two 
  lateral 
  whitish 
  stripes 
  ; 
  the 
  pleurae 
  

   are 
  entirely 
  greyish 
  and 
  unspotted. 
  The 
  bristles 
  of 
  the 
  back 
  are 
  black 
  ; 
  the 
  

   pubescence 
  is 
  pale 
  yellowish 
  ; 
  on 
  the 
  pleurae 
  the 
  st. 
  and 
  the 
  mpl. 
  are 
  black, 
  while 
  

   the 
  others 
  are 
  pale 
  yellowish 
  or 
  whitish, 
  like 
  the 
  hairs. 
  Scutellum 
  blackish, 
  greyish 
  

   at 
  the 
  end 
  and 
  below, 
  with 
  four 
  equally 
  long 
  and 
  strong 
  black 
  bristles, 
  the 
  apical 
  

   ones 
  diverging. 
  Postscutellum 
  and 
  mesophragma 
  coloured 
  like 
  the 
  pleurae. 
  

   Squamulae 
  and 
  halteres 
  dirty 
  whitish, 
  the 
  former 
  with 
  a 
  white 
  fringe. 
  Abdomen 
  

   broad 
  and 
  flat, 
  grey, 
  with 
  two 
  longitudinal 
  rows 
  of 
  blackish 
  spots, 
  which 
  are 
  partly 
  

   confluent 
  to 
  form 
  two 
  longitudinal 
  stripes 
  ; 
  last 
  segment 
  with 
  a 
  broad 
  yellowish 
  

   hind 
  border 
  ; 
  pubescence 
  pale 
  yellowish 
  ; 
  apical 
  bristles 
  black 
  ; 
  genitalia 
  yellowish 
  ; 
  

   venter 
  yellowish 
  grey. 
  Legs 
  entirely 
  yellowish, 
  the 
  femora 
  more 
  or 
  less 
  greyish 
  

   on 
  the 
  outer 
  side 
  ; 
  hairs 
  and 
  bristles 
  pale 
  yellowish 
  or 
  whitish, 
  only 
  the 
  apical 
  

   spur 
  of 
  the 
  middle 
  tibiae 
  being 
  black. 
  Wings 
  with 
  a 
  well-developed 
  black 
  costal 
  

   bristle 
  ; 
  costa 
  black 
  on 
  the 
  dark, 
  and 
  yellowish 
  on 
  the 
  hyaline 
  parts 
  ; 
  veins 
  black, 
  

   in 
  part 
  yellowish 
  at 
  base 
  and 
  on 
  the 
  hyaline 
  spots 
  ; 
  stigma 
  longer 
  than 
  broad, 
  

   deep 
  black, 
  with 
  a 
  small 
  circular, 
  sharply 
  defined, 
  whitish 
  hyaline 
  spot 
  before 
  the 
  

   end. 
  First 
  vein 
  ending 
  before 
  the 
  small 
  cross- 
  vein 
  ; 
  2nd 
  vein 
  straight 
  ; 
  3rd 
  vein 
  

   bare, 
  straight 
  throughout 
  and 
  parallel 
  with 
  the 
  last 
  portion 
  of 
  the 
  4th 
  ; 
  small 
  

   cross- 
  vein 
  placed 
  considerably 
  beyond 
  the 
  middle 
  of 
  the 
  discoidal 
  cell 
  ; 
  hind 
  

   cross-vein 
  perpendicular, 
  convex 
  outwardly, 
  distinctly 
  longer 
  than 
  its 
  distance 
  

   from 
  the 
  anterior 
  one 
  ; 
  discoidal 
  cell 
  long 
  ; 
  anal 
  cell 
  broader 
  than 
  the 
  second 
  basal 
  

   cell, 
  with 
  an 
  acute 
  but 
  not 
  produced 
  lower 
  apical 
  angle 
  ; 
  6th 
  vein 
  complete 
  but 
  

   colourless 
  at 
  the 
  end. 
  The 
  pattern 
  is 
  blackish, 
  more 
  intense 
  on 
  the 
  fore 
  half, 
  paler 
  

   behind 
  ; 
  in 
  general 
  shape 
  it 
  is 
  like 
  that 
  figured 
  by 
  Loew 
  for 
  dubia 
  (pi. 
  ii, 
  fig. 
  20) 
  

   with 
  the 
  following 
  differences, 
  besides 
  the 
  hyaline 
  spot 
  of 
  the 
  stigma 
  ; 
  the 
  hyaline 
  

   spots 
  in 
  the 
  costal 
  cell 
  are 
  broader 
  ; 
  in 
  the 
  base 
  of 
  the 
  submarginal, 
  1st 
  and 
  2nd 
  basal 
  

   and 
  discoidal 
  cells 
  there 
  are 
  only 
  very 
  few, 
  much 
  broader 
  hyaline 
  spots 
  ; 
  the 
  3rd 
  

   posterior 
  cell 
  has 
  the 
  reticulation 
  closer, 
  being 
  fuscous 
  with 
  about 
  8 
  hyaline 
  spots. 
  

   The 
  axillary 
  lobe 
  is 
  likewise 
  hyaline, 
  with 
  two 
  fuscous 
  rounded 
  spots 
  at 
  the 
  hind 
  

   border 
  ; 
  the 
  anal 
  cell 
  is 
  also 
  hyaline. 
  

  

  Type 
  (J, 
  and 
  an 
  additional 
  specimen 
  of 
  the 
  same 
  sex 
  from 
  Durban, 
  Umbilo, 
  

   28.vi.1914 
  (L. 
  Bevis). 
  

  

  These 
  two 
  species, 
  dubia 
  and 
  magnipalpis, 
  which 
  agree 
  in 
  palpal 
  and 
  other 
  

   characters, 
  and 
  have 
  a 
  similar 
  wing 
  pattern 
  with 
  much 
  extended 
  black 
  parts, 
  require 
  

   the 
  formation 
  of 
  a 
  new 
  genus, 
  if 
  they 
  cannot 
  be 
  placed 
  in 
  the 
  genera 
  Spathulina 
  

   or 
  Pliomelaena. 
  

  

  