﻿NOTES 
  ON 
  THE 
  ETHIOPIAN 
  FRUIT 
  PLIES, 
  OTHER 
  THAN 
  DACUS. 
  215 
  

  

  Eyes 
  oval, 
  less 
  compressed, 
  their 
  vertical 
  diameter 
  being 
  only 
  a 
  little 
  longer 
  than 
  

   the 
  horizontal 
  one. 
  Frons 
  flat, 
  not 
  at 
  all 
  prominent 
  in 
  profile, 
  with 
  parallel 
  sides, 
  

   only 
  a 
  little 
  longer 
  than 
  broad 
  ; 
  lunula 
  narrow, 
  but 
  much 
  extended 
  laterally 
  ; 
  face 
  

   flat 
  in 
  the 
  middle, 
  with 
  shallow 
  antennal 
  grooves 
  and 
  with 
  distinctly 
  prominent 
  

   mouth-border. 
  Cheeks 
  linear 
  ; 
  jowls 
  not 
  broader 
  than 
  the 
  breadth 
  of 
  the 
  third 
  

   antennal 
  joint. 
  Antennae 
  inserted 
  at 
  the 
  middle 
  of 
  the 
  eyes, 
  only 
  a 
  little 
  shorter 
  

   than 
  the 
  face 
  ; 
  third 
  joint 
  pubescent, 
  rounded 
  at 
  tip 
  ; 
  arista 
  plumose, 
  its 
  feathering 
  

   being 
  about 
  as 
  broad 
  as 
  the 
  length 
  of 
  the 
  third 
  antennal 
  joint. 
  Proboscis 
  short 
  

   and 
  thick, 
  with 
  very 
  broad 
  flaps, 
  which 
  cover 
  the 
  palpi. 
  Cephalic 
  chaetotaxy 
  

   rather 
  developed, 
  only 
  the 
  oc, 
  pvt. 
  and 
  genal 
  bristles 
  being 
  wanting 
  ; 
  no 
  ocp. 
  ; 
  outer 
  

   vt. 
  half 
  as 
  long 
  as 
  the 
  strong 
  inner 
  pair 
  ; 
  one 
  strong 
  s. 
  or., 
  and 
  two 
  pairs 
  of 
  long 
  and 
  

   distant 
  i. 
  or. 
  Thorax 
  elongate, 
  with 
  incomplete 
  suture 
  and 
  reduced 
  chaetotaxy 
  ; 
  

   there 
  are 
  only 
  two 
  npl., 
  one 
  a., 
  and 
  two 
  p. 
  sa., 
  one 
  mpl., 
  one 
  pi. 
  ; 
  the 
  scp. 
  are 
  

   rudimentary, 
  only 
  the 
  middle 
  pair 
  being 
  distinct. 
  Scutellum 
  triangular, 
  flat 
  above, 
  

   a 
  little 
  broader 
  than 
  long, 
  distinctly 
  carinate 
  on 
  the 
  sides, 
  with 
  only 
  the 
  b. 
  set., 
  which 
  

   are 
  very 
  long, 
  strong 
  and 
  diverging. 
  Abdomen 
  narrow 
  and 
  long, 
  of 
  cylindrical 
  

   shape, 
  narrow 
  at 
  base 
  but 
  not 
  properly 
  pedunculate, 
  in 
  the 
  male 
  with 
  4, 
  in 
  the 
  

   female 
  with 
  5 
  segments 
  ; 
  the 
  last 
  two 
  segments 
  bear 
  some 
  strong 
  bristles 
  at 
  the 
  

   sides 
  behind. 
  Male 
  genitalia 
  small 
  and 
  rounded 
  ; 
  ovipositor 
  short, 
  depressed, 
  

   with 
  the 
  basal 
  segment 
  as 
  long 
  and 
  nearly 
  as 
  broad 
  as 
  the 
  terminal 
  segment 
  of 
  the 
  

   abdomen, 
  and 
  with 
  the 
  apical 
  segment 
  much 
  narrower 
  and 
  acute. 
  Legs 
  long 
  and 
  

   simple, 
  with 
  non-spinose 
  femora, 
  even 
  the 
  front 
  pair 
  being 
  without 
  bristles 
  below 
  ; 
  

   middle 
  femora 
  elongate, 
  as 
  long 
  as 
  their 
  tibiae, 
  and 
  a 
  little 
  thickened 
  ; 
  middle 
  tibiae 
  

   with 
  a 
  single 
  long 
  spur 
  at 
  end 
  ; 
  hind 
  tibiae 
  shorter 
  than 
  their 
  femora, 
  distinctly 
  

   curved, 
  with 
  scattered 
  bristles 
  on 
  the 
  outer 
  side 
  ; 
  claws 
  very 
  short. 
  Wings 
  short 
  

   and 
  proportionally 
  narrow, 
  hyaline, 
  with 
  a 
  broad 
  black 
  spot 
  at 
  apex. 
  Costa 
  

   densely 
  ciliate, 
  with 
  no 
  distinct 
  bristle 
  ; 
  auxiliary 
  vein 
  closely 
  approximate 
  to 
  the 
  

   first 
  longitudinal 
  vein, 
  which 
  ends 
  at 
  middle 
  of 
  the 
  fore 
  border, 
  before 
  the 
  small 
  

   cross-vein, 
  and 
  is 
  pilose 
  above. 
  Second 
  longitudinal 
  vein 
  straight 
  ; 
  third 
  bristly 
  

   throughout 
  its 
  whole 
  length 
  and 
  slightly 
  curved 
  but 
  not 
  sinuous 
  ; 
  last 
  segment 
  of 
  the 
  

   fourth 
  vein 
  slightly 
  diverging 
  at 
  end 
  ; 
  small 
  cross- 
  vein 
  a 
  little 
  beyond 
  the 
  middle 
  ; 
  

   hind 
  cross-vein 
  straight 
  and 
  perpendicular, 
  2J 
  times 
  as 
  long 
  as 
  the 
  small 
  one 
  ; 
  

   anal 
  cell 
  a 
  little 
  broader 
  than 
  the 
  second 
  basal 
  cell, 
  its 
  inferior 
  angle 
  acute 
  but 
  not 
  

   produced 
  and 
  shorter 
  than 
  the 
  upper 
  one 
  ; 
  sixth 
  vein 
  reaching 
  the 
  hind 
  border. 
  

   Axillary 
  lobe 
  equal 
  in 
  the 
  two 
  sexes 
  ; 
  alula 
  longer 
  than 
  broad. 
  

   Type 
  : 
  the 
  following 
  new 
  species 
  : 
  — 
  

  

  Sosiopsila 
  trisetosa, 
  sp. 
  nov. 
  (PI. 
  xvii, 
  fig. 
  1). 
  

  

  A 
  narrow 
  and 
  elongate, 
  entirely 
  yellow 
  species 
  not 
  unlike 
  a 
  Psila, 
  with 
  a 
  broad 
  

   rounded 
  black 
  spot 
  on 
  the 
  mesophragma, 
  and 
  with 
  a 
  broad 
  black 
  spot 
  near 
  the 
  apex 
  

   of 
  the 
  wing. 
  

  

  (J 
  J. 
  Length 
  of 
  body, 
  6*5-7 
  mm. 
  ; 
  of 
  wing, 
  4*5-5 
  mm. 
  ; 
  of 
  ovipositor, 
  0*7 
  mm. 
  

  

  Head 
  and 
  its 
  appendages 
  completely 
  yellow. 
  Occiput 
  shining, 
  unspotted 
  ; 
  frons 
  

   more 
  yellow, 
  dull 
  and 
  finely 
  pubescent 
  in 
  the 
  middle, 
  but 
  with 
  shining 
  ocellar 
  and 
  

   vertical 
  plates, 
  the 
  ocellar 
  not 
  being 
  reddish 
  brown, 
  like 
  the 
  upper 
  border 
  of 
  the 
  

   lunula. 
  Face 
  shining 
  in 
  the 
  centre 
  ; 
  cheeks 
  and 
  jowls 
  with 
  a 
  faint 
  whitish 
  dust, 
  

  

  