﻿254 
  PROF. 
  M. 
  BEZZI. 
  

  

  arista 
  long 
  and 
  with 
  rather 
  long 
  pubescence, 
  its 
  feathering 
  being 
  about 
  as 
  broad 
  

   as 
  the 
  breadth 
  of 
  the 
  third 
  antennal 
  joint. 
  Palpi 
  whitish 
  ; 
  proboscis 
  dirty 
  brown. 
  

   All 
  the 
  cephalic 
  bristles 
  are 
  black, 
  even 
  those 
  of 
  the 
  occipital 
  row 
  ; 
  two 
  s. 
  or., 
  

   the 
  basal 
  one 
  much 
  smaller 
  ; 
  three 
  i. 
  or., 
  the 
  apical 
  ones 
  much 
  smaller 
  ; 
  oc. 
  as 
  

   developed 
  as 
  the 
  basal 
  pair 
  of 
  the 
  s. 
  or. 
  ; 
  occipital 
  hairs 
  sparse 
  and 
  black. 
  Thorax 
  

   narrow 
  and 
  elongate, 
  shining 
  black, 
  more 
  glistening 
  on 
  the 
  sides 
  and 
  on 
  the 
  pleurae 
  ; 
  

   the 
  short 
  and 
  very 
  sparse 
  pubescence 
  of 
  the 
  back 
  is 
  black 
  ; 
  all 
  the 
  bristles 
  are 
  

   black 
  ; 
  dc. 
  placed 
  before 
  the 
  line 
  of 
  the 
  a. 
  sa. 
  ; 
  one 
  mpl. 
  ; 
  pt. 
  weaker 
  than 
  the 
  

   st. 
  Scutellum 
  shining 
  black, 
  with 
  only 
  the 
  b. 
  set., 
  which 
  are 
  very 
  long 
  and 
  divergent. 
  

   Postscutellum 
  and 
  mesophragma 
  shining 
  black 
  like 
  the 
  hypopleural 
  callosities 
  ; 
  

   halteres 
  black 
  ; 
  squamulae 
  dark 
  and 
  with 
  a 
  dark 
  fringe. 
  Abdomen 
  narrow 
  and 
  

   elongate, 
  narrower 
  than 
  but 
  about 
  as 
  long 
  as 
  the 
  thorax 
  ; 
  it 
  is 
  shining 
  black, 
  with 
  

   sparse 
  black 
  pubescence 
  and 
  short 
  black 
  bristles 
  ; 
  in 
  the 
  male 
  it 
  is 
  obtuse 
  at 
  the 
  

   end, 
  the 
  genitalia 
  being 
  shining 
  black 
  and 
  placed 
  inferiorly 
  at 
  the 
  side 
  ; 
  in 
  the 
  

   female 
  the 
  ovipositor 
  is 
  as 
  long 
  as 
  the 
  abdomen, 
  glistening 
  black 
  and 
  with 
  black 
  

   pubescence, 
  broad 
  at 
  base 
  and 
  acute 
  at 
  end, 
  depressed 
  ; 
  the 
  apical 
  segment 
  is 
  dark 
  

   reddish-brown 
  at 
  base. 
  Venter 
  shining 
  black, 
  with 
  a 
  faint 
  dark 
  grey 
  dust. 
  Legs 
  

   rather 
  long 
  and 
  slender 
  ; 
  they 
  have 
  dark 
  brown 
  coxae 
  and 
  reddish 
  trochanters 
  ; 
  

   the 
  femora 
  are 
  shining 
  black, 
  but 
  narrowly 
  brownish 
  on 
  the 
  sides 
  ; 
  the 
  four 
  anterior 
  

   tibiae 
  are 
  yellow 
  like 
  their 
  tarsi 
  ; 
  the 
  hind 
  tibiae 
  are 
  broadly 
  darkened 
  at 
  base, 
  

   more 
  broadly 
  in 
  the 
  female, 
  and 
  the 
  tarsi 
  are 
  dark 
  yellowish 
  ; 
  front 
  femora 
  with 
  

   2-3 
  thin 
  black 
  bristles 
  beneath 
  on 
  the 
  apical 
  half 
  ; 
  hind 
  tibiae 
  destitute 
  of 
  a 
  distinct 
  

   row 
  of 
  bristles 
  on 
  the 
  outer 
  side. 
  Wings 
  very 
  narrow 
  and 
  elongate, 
  with 
  rudimentary 
  

   axillary 
  lobe 
  and 
  alula, 
  but 
  appearing 
  not 
  so 
  cuneate 
  as 
  in 
  angusta, 
  because 
  they 
  

   are 
  not 
  dilated 
  distally 
  and 
  have 
  a 
  much 
  narrower 
  third 
  posterior 
  cell. 
  The 
  veins 
  

   are 
  black, 
  but 
  the 
  costa 
  and 
  the 
  first 
  longitudinal 
  are 
  yellow 
  in 
  the 
  two 
  hyaline 
  

   identations 
  of 
  the 
  fore 
  border 
  ; 
  costal 
  bristle 
  long 
  and 
  strong. 
  The 
  wing 
  pattern 
  

   is 
  like 
  that 
  of 
  angusta, 
  differing 
  chiefly 
  in 
  the 
  presence 
  of 
  two 
  hyaline 
  central 
  spots, 
  

   and 
  in 
  the 
  indentations 
  of 
  the 
  hind 
  border 
  being 
  more 
  spot-like. 
  The 
  base 
  is 
  

   entirely 
  hyaline, 
  without 
  the 
  obtuse 
  black 
  band 
  of 
  angusta, 
  or 
  only 
  with 
  a 
  faint 
  

   indication 
  of 
  it 
  below 
  the 
  humeral 
  cross-vein. 
  The 
  stigma 
  is 
  entirely 
  black 
  and 
  

   about 
  as 
  long 
  as 
  the 
  black 
  apical 
  part 
  of 
  the 
  second 
  costal 
  cell. 
  The 
  two 
  hyaline 
  

   indentations 
  of 
  the 
  fore 
  border 
  are 
  broader, 
  more 
  regularly 
  triangular 
  and 
  of 
  equal 
  

   •size 
  ; 
  the 
  black 
  band 
  between 
  them 
  is 
  broadly 
  triangular 
  and 
  disposed 
  perpendicu- 
  

   larly 
  to 
  the 
  costa 
  ; 
  the 
  tips 
  of 
  the 
  hyaline 
  indentations 
  are 
  placed 
  exactly 
  on 
  the 
  

   third 
  vein 
  and 
  are 
  obtuse, 
  but 
  at 
  the 
  upper 
  end 
  of 
  the 
  small 
  cross-vein 
  there 
  is 
  a 
  

   very 
  narrow 
  short 
  hyaline 
  streak, 
  which 
  is 
  separated 
  from 
  the 
  vertex 
  of 
  the 
  second 
  

   hyaline 
  indentation. 
  A 
  little 
  before 
  the 
  middle 
  of 
  the 
  first 
  posterior 
  cell 
  there 
  is 
  

   a 
  rather 
  broad, 
  rounded 
  or 
  shortly 
  oval, 
  hyaline 
  spot 
  as 
  in 
  the 
  following 
  species. 
  

   The 
  discoidal 
  cell 
  is 
  entirely 
  black, 
  but 
  near 
  its 
  base 
  there 
  is 
  a 
  rounded 
  hyaline 
  

   dot, 
  which 
  is 
  smaller 
  than 
  the 
  above-named 
  one. 
  The 
  three 
  hyaline 
  indentations 
  

   of 
  the 
  hind 
  border 
  are 
  very 
  different 
  from 
  those 
  of 
  angusta, 
  being 
  much 
  shorter 
  

   and 
  not 
  produced 
  into 
  the 
  discoidal 
  cell 
  ; 
  the 
  two 
  indentations 
  of 
  the 
  third 
  posterior 
  

   cell 
  have 
  the 
  shape 
  of 
  two 
  rounded 
  spots 
  ; 
  the 
  indentation 
  of 
  the 
  second 
  posterior 
  

   cell 
  is 
  twice 
  as 
  long 
  as 
  the 
  other, 
  but 
  is 
  broad 
  and 
  not 
  stripe-like. 
  The 
  axillary 
  

   lobe 
  and 
  the 
  alula 
  are 
  hyaline. 
  The 
  third 
  posterior 
  cell 
  is 
  much 
  narrower 
  than 
  

  

  