﻿NOTES 
  ON 
  THE 
  ETHIOPIAN 
  FRUIT 
  FLIES, 
  OTHER 
  THAN 
  DACUS. 
  245 
  

  

  the 
  hind 
  border 
  of 
  the 
  wing 
  to 
  the 
  end 
  of 
  the 
  sixth 
  vein 
  ; 
  this 
  recurrent 
  band 
  is 
  

   yellowish 
  interiorly 
  and 
  fuscous 
  exteriorly. 
  The 
  hyaline 
  band 
  between 
  these 
  two 
  

   yellow 
  longitudinal 
  bands 
  is 
  nearly 
  equal 
  in 
  breadth 
  throughout 
  its 
  whole 
  length 
  

   and 
  is 
  bent 
  just 
  above 
  the 
  small 
  cross-vein, 
  entering 
  there 
  as 
  a 
  small 
  streak 
  into 
  

   the 
  marginal 
  cell, 
  below 
  and 
  before 
  the 
  rounded 
  black 
  spot 
  of 
  the 
  fore 
  border. 
  

   The 
  hyaline 
  band 
  between 
  the 
  central 
  yellow 
  band 
  and 
  the 
  recurrent 
  posterior 
  

   b>and 
  ends 
  with 
  a 
  rounded 
  tip 
  in 
  the 
  base 
  of 
  the 
  first 
  posterior 
  cell 
  just 
  behind 
  the 
  

   small 
  cross- 
  vein 
  ; 
  at 
  base 
  this 
  band 
  is 
  united 
  with 
  the 
  hyaline 
  axillary 
  lobe. 
  The 
  

   second 
  basal 
  cell 
  is 
  almost 
  entirely 
  hyaline, 
  while 
  the 
  discoidal 
  and 
  third 
  posterior 
  

   cells 
  are 
  almost 
  entirely 
  infuscated 
  except 
  the 
  broad 
  hyaline 
  band 
  mentioned 
  

   •above. 
  

  

  Type 
  $, 
  a 
  single 
  specimen 
  from 
  the 
  Gold 
  Coast, 
  Aburi, 
  1912-13 
  (W. 
  H. 
  Patterson). 
  

  

  Acidia, 
  Rob.-Desv., 
  1830. 
  

   Three 
  species 
  are 
  provisionally 
  placed 
  in 
  the 
  present 
  genus, 
  those 
  here 
  described 
  

   as 
  new 
  being 
  very 
  like 
  the 
  European 
  A. 
  caesio 
  ; 
  they 
  may 
  be 
  distinguished 
  as 
  

   follows 
  : 
  — 
  

   1(4). 
  Discoidal 
  and 
  third 
  posterior 
  cells 
  with 
  hyaline 
  streaks 
  or 
  spots. 
  

  

  2(3). 
  Thorax 
  and 
  femora 
  black 
  ; 
  the 
  apical 
  dark 
  bands 
  of 
  the 
  wing 
  broadly 
  united 
  

   with 
  the 
  basal 
  patch, 
  the 
  second 
  hyaline 
  indentation 
  of 
  the 
  fore 
  border 
  

   being 
  quite 
  wanting 
  ; 
  discoidal 
  and 
  third 
  posterior 
  cells 
  each 
  with 
  a 
  

   hyaline 
  rounded 
  spot 
  . 
  . 
  . 
  . 
  . 
  . 
  seychellensis, 
  Lamb. 
  

  

  3(2). 
  Thorax 
  and 
  femora 
  entirely 
  yellow 
  ; 
  the 
  apical 
  dark 
  bands 
  quite 
  separated 
  

   from 
  the 
  basal 
  pattern 
  by 
  the 
  second 
  indentation, 
  which 
  forms 
  a 
  complete 
  

   hyaline 
  cross-band 
  ; 
  discoidal 
  and 
  third 
  posterior 
  cells, 
  each 
  with 
  a 
  

   hyaline 
  streak 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  fossataeformis, 
  sp. 
  n. 
  

  

  4(1). 
  The 
  above-named 
  cells 
  entirely 
  fuscous 
  and 
  destitute 
  of 
  hyaline 
  parts 
  ; 
  

   body 
  and 
  femora 
  entirely 
  black 
  ; 
  wings 
  with 
  two 
  hyaline 
  indentations 
  

   at 
  fore 
  border 
  . 
  , 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  homogenea, 
  sp. 
  n. 
  

  

  Acidia 
  fossataeformis, 
  sp. 
  nov. 
  (PL 
  xviii, 
  fig. 
  1). 
  

  

  An 
  elegant 
  species 
  very 
  like 
  the 
  Oriental 
  A.fossata, 
  F., 
  but 
  at 
  once 
  distinguished 
  

   by 
  its 
  entirely 
  yellow 
  thorax 
  and 
  legs. 
  

  

  (J 
  §. 
  Length 
  of 
  body 
  4'5-5 
  mm. 
  ; 
  of 
  wing 
  4-4'5 
  mm. 
  ; 
  of 
  ovipositor 
  0*8 
  mm. 
  

  

  Head 
  entirely 
  yellow 
  and 
  unspotted, 
  except 
  the 
  very 
  small 
  black 
  ocellar 
  dot. 
  

  

  Occiput 
  flat 
  on 
  the 
  upper 
  half, 
  even 
  a 
  little 
  concave 
  above 
  the 
  median 
  tubercle, 
  

  

  convex 
  but 
  not 
  very 
  prominent 
  on 
  the 
  lower 
  half, 
  without 
  distinct 
  swellings. 
  

  

  Frons 
  reddish 
  yellow, 
  opaque, 
  with 
  scattered 
  dark 
  hairs 
  and 
  moderately 
  shining 
  

  

  vertical 
  plates 
  ; 
  it 
  is 
  parallel-sided, 
  narrower 
  than 
  the 
  eye, 
  2J 
  times 
  as 
  long 
  as 
  

  

  broad 
  ; 
  lunula 
  broad 
  and 
  short, 
  semicircular, 
  whitish, 
  with 
  brown 
  upper 
  border. 
  

  

  In 
  profile 
  the 
  frons 
  is 
  only 
  a 
  little 
  prominent 
  above 
  the 
  antennae 
  ; 
  the 
  eyes 
  are 
  

  

  rather 
  rounded, 
  their 
  vertical 
  diameter 
  being 
  only 
  a 
  little 
  longer 
  than 
  the 
  horizontal. 
  

  

  Face 
  flat 
  and 
  long, 
  not 
  prominent 
  at 
  mouth-border, 
  with 
  a 
  broad 
  middle 
  keel 
  and 
  

  

  not 
  very 
  deep 
  antennal 
  grooves 
  ; 
  cheeks 
  linear, 
  whitish 
  ; 
  jowls 
  whitish, 
  unspotted, 
  

  

  as 
  broad 
  as 
  the 
  breadth 
  of 
  the 
  third 
  antennal 
  joint. 
  Antennae 
  entirely 
  yellow, 
  

  

  inserted 
  at 
  the 
  middle 
  of 
  the 
  eyes, 
  short, 
  extending 
  only 
  to 
  the 
  middle 
  of 
  the 
  face 
  ; 
  

  

  second 
  joint 
  swollen 
  and 
  prominent, 
  with 
  a 
  short 
  bristle 
  above 
  ; 
  third 
  joint 
  rather 
  

  

  (637) 
  C2 
  

  

  