﻿218 
  PKOF. 
  M. 
  BEZZI. 
  

  

  at 
  the 
  end 
  ; 
  hind 
  tibiae 
  straight, 
  shorter 
  than 
  the 
  femora, 
  with 
  some 
  short 
  bristles 
  

   on 
  outer 
  side; 
  claws 
  short. 
  Wings 
  long, 
  hyaline, 
  with 
  a 
  very 
  small 
  apical 
  black 
  

   spot. 
  Costa 
  not 
  ciliated, 
  shortly 
  pilose, 
  without 
  bristle; 
  auxiliary 
  vein 
  closely 
  

   approximated 
  to 
  the 
  first 
  vein, 
  which 
  is 
  pilose 
  and 
  ends 
  before 
  or 
  opposite 
  to 
  

   the 
  small 
  cross-vein; 
  second 
  and 
  third 
  vein 
  straight 
  and 
  diverging 
  at 
  their 
  ends, 
  

   the 
  third 
  bristly 
  throughout 
  ; 
  small 
  cross-vein 
  beyond 
  the 
  middle 
  of 
  the 
  discoidal 
  

   cell 
  ; 
  hind 
  cross-vein 
  straight 
  and 
  perpendicular 
  ; 
  last 
  segments 
  of 
  the 
  third 
  and 
  

   fourth 
  veins 
  parallel 
  ; 
  second 
  basal 
  cell 
  not 
  dilated, 
  but 
  very 
  long 
  ; 
  sixth 
  vein 
  

   produced 
  to 
  the 
  hind 
  border 
  ; 
  anal 
  cell 
  not 
  broader 
  than 
  the 
  second 
  basal 
  cell, 
  its 
  

   lower 
  angle 
  drawn 
  out 
  into 
  a 
  point 
  which 
  is 
  rather 
  long, 
  but 
  is 
  always 
  shorter 
  than 
  

   the 
  second 
  basal 
  cell 
  ; 
  axillary 
  lobe 
  equal 
  in 
  the 
  two 
  sexes 
  ; 
  alula 
  longer 
  than 
  broad. 
  

  

  The 
  known 
  species 
  may 
  be 
  distinguished 
  as 
  follows 
  : 
  — 
  

   1(2). 
  Front 
  femora 
  with 
  some 
  bristles 
  below 
  near 
  the 
  end 
  ; 
  wings 
  without 
  black 
  

   apical 
  spot, 
  but 
  with 
  a 
  dark 
  border 
  to 
  the 
  hind 
  cross-vein 
  

  

  madagascariensis, 
  End. 
  

  

  2(1). 
  Front 
  femora 
  with 
  only 
  one 
  bristle 
  below 
  ; 
  wings 
  with 
  a 
  black 
  apical 
  spot, 
  

   but 
  the 
  hind 
  cross- 
  vein 
  not 
  or 
  less 
  infuscated. 
  

  

  3(4). 
  Thorax 
  on 
  the 
  dorsum 
  with 
  a 
  whitish 
  pollinose, 
  longitudinal, 
  middle 
  stripe 
  ; 
  

   wings 
  with 
  yellow 
  stigma 
  and 
  with 
  a 
  slightly 
  infuscated 
  hind 
  cross-vein 
  

  

  strigata, 
  sp. 
  nov. 
  

  

  4(3). 
  Thorax 
  not 
  striped 
  ; 
  wings 
  with 
  black 
  stigma 
  and 
  the 
  hind 
  cross- 
  vein 
  not 
  

   infuscated 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  melanostigma, 
  sp. 
  nov. 
  

  

  Coelopacidia 
  strigata, 
  sp. 
  nov. 
  

  

  An 
  elongate, 
  entirely 
  yellow 
  species, 
  distinguished 
  by 
  the 
  whitish 
  thoracic 
  stripe 
  

   and 
  the 
  yellow 
  pterostigma. 
  

  

  <J 
  $. 
  Length 
  of 
  body 
  9-9*5 
  mm. 
  ; 
  of 
  ovipositor 
  1 
  mm. 
  ; 
  of 
  wing 
  8-8*5 
  mm. 
  

  

  Head 
  entirely 
  yellow, 
  unspotted, 
  only 
  the 
  very 
  small 
  ocellar 
  dot 
  being 
  black. 
  

   Occiput 
  very 
  shining 
  and 
  bare, 
  except 
  for 
  a 
  few 
  short 
  hairs 
  near 
  the 
  neck 
  and 
  on 
  the 
  

   lower 
  part 
  ; 
  frons 
  wholly 
  glistening, 
  quite 
  bare, 
  with 
  the 
  front 
  part 
  slightly 
  reddish 
  

   above 
  the 
  lunula, 
  the 
  upper 
  border 
  of 
  which 
  is 
  narrowly 
  brown. 
  Face 
  very 
  glistening 
  ; 
  

   cheeks 
  and 
  jowls 
  not 
  pruinose. 
  Antennae 
  entirely 
  yellow, 
  even 
  on 
  the 
  apical 
  part 
  

   of 
  the 
  last 
  joint 
  ; 
  second 
  joint 
  short 
  and 
  nearly 
  bare 
  ; 
  third 
  joint 
  about 
  twice 
  as 
  long 
  

   as 
  broad 
  ; 
  arista 
  yellowish. 
  Palpi 
  pale 
  yellowish 
  ; 
  proboscis 
  dirty 
  reddish, 
  with 
  

   pale 
  hairs. 
  Of 
  the 
  cephalic 
  bristles 
  the 
  two 
  pairs 
  of 
  vt. 
  and 
  the 
  s. 
  or. 
  are 
  black, 
  the 
  

   thin 
  pvt. 
  and 
  the 
  ocp. 
  are 
  yellowish, 
  like 
  the 
  i. 
  or. 
  and 
  the 
  genal 
  bristle 
  ; 
  the 
  sparse 
  

   and 
  short 
  hairs 
  of 
  the 
  lower 
  part 
  of 
  the 
  occiput 
  are 
  pale 
  yellowish. 
  Thorax 
  entirely 
  

   yellow 
  and 
  shining; 
  but 
  the 
  dorsum, 
  being 
  punctulate, 
  is 
  less 
  shining 
  than 
  the 
  

   very 
  glistening 
  pleurae, 
  which 
  are 
  moreover 
  of 
  a 
  paler 
  colour 
  ; 
  the 
  whitish 
  pollinose 
  

   middle 
  stripe 
  is 
  broad, 
  but 
  only 
  distinct 
  when 
  the 
  thorax 
  is 
  viewed 
  from 
  in 
  front 
  ; 
  

   this 
  stripe 
  begins 
  just 
  beyond 
  the 
  the 
  middle 
  scp. 
  and 
  ends 
  before 
  reaching 
  the 
  

   scutellum 
  broadening 
  gradually 
  behind. 
  The 
  very 
  short 
  and 
  sparse 
  pubescence 
  of 
  

   the 
  dorsum 
  is 
  pale 
  yellow, 
  while 
  the 
  pleurae 
  are 
  quite 
  bare, 
  with 
  only 
  a 
  few, 
  

   hardly 
  visible, 
  thin 
  and 
  whitish 
  hairs 
  on 
  the 
  mesopleura. 
  Scutellum 
  entirely 
  

   glistening 
  yellow, 
  bare, 
  with 
  some 
  scattered 
  pale 
  hairs 
  at 
  the 
  hind 
  border. 
  

   All 
  the 
  macrochaetae 
  of 
  the 
  thorax 
  and 
  scutellum 
  are 
  black. 
  Postscutellum 
  and 
  

  

  