﻿260 
  PROF. 
  M. 
  BEZZI. 
  

  

  are 
  yellowish, 
  those 
  of 
  the 
  hind 
  border 
  of 
  the 
  head 
  being 
  paler 
  ; 
  two 
  i. 
  or., 
  which 
  

   are 
  more 
  developed 
  than 
  the 
  s. 
  or. 
  ; 
  oc. 
  about 
  as 
  long 
  as 
  the 
  vt. 
  Thorax, 
  scutellum, 
  

   postscutellum 
  and 
  mesophragma 
  entirely 
  black, 
  but 
  clothed 
  with 
  dense 
  cinerous 
  

   tomentum, 
  which 
  on 
  the 
  back 
  is 
  more 
  clear 
  and 
  shows 
  a 
  little 
  bluish 
  nuance 
  ; 
  

   the 
  short 
  hairs 
  are 
  pale 
  yellowish, 
  like 
  all 
  the 
  macrochaetae, 
  but 
  those 
  of 
  back 
  

   are 
  darkened 
  at 
  the 
  base 
  and 
  inserted 
  on 
  small 
  blackish 
  dots 
  ; 
  dc. 
  placed 
  well 
  in 
  

   front, 
  only 
  a 
  little 
  beneath 
  the 
  line 
  of 
  the 
  prst. 
  ; 
  pt. 
  as 
  strong 
  as 
  the 
  mpl. 
  ; 
  st. 
  even 
  

   stronger. 
  Scutellum 
  bare, 
  with 
  the 
  h. 
  set. 
  only, 
  which 
  are 
  long, 
  divergent, 
  

   inserted 
  on 
  rather 
  large 
  black 
  spots 
  and 
  placed 
  rather 
  distant 
  from 
  the 
  

   borders 
  ; 
  there 
  is 
  no 
  trace 
  of 
  the 
  a. 
  set. 
  Squamulae 
  whitish, 
  with 
  a 
  rather 
  long 
  

   whitish 
  fringe 
  ; 
  halteres 
  pale 
  yellowish, 
  with 
  a 
  little 
  infuscated 
  knob. 
  Abdomen 
  

   broad 
  and 
  very 
  obtuse 
  at 
  the 
  end 
  ; 
  it 
  is 
  reddish 
  yellow 
  above 
  on 
  the 
  first 
  three 
  

   segments, 
  and 
  quite 
  black 
  on 
  the 
  fourth, 
  which 
  is 
  twice 
  as 
  long 
  as 
  the 
  preceding 
  

   segment 
  ; 
  all 
  the 
  hairs 
  are 
  pale 
  yellowish, 
  like 
  the 
  lateral 
  and 
  apical 
  bristles 
  ; 
  

   venter 
  entirely 
  reddish, 
  even 
  on 
  the 
  last 
  segment 
  ; 
  genitalia 
  rounded, 
  blackish 
  

   brown. 
  Legs 
  rather 
  short 
  and 
  stout 
  ; 
  they 
  are 
  entirely 
  reddish 
  and 
  rather 
  bare, 
  

   with 
  whitish 
  dust 
  ; 
  front 
  femora 
  with 
  a 
  row 
  of 
  four 
  stout 
  yellowish 
  bristles 
  beneath 
  

   on 
  the 
  apical 
  half 
  ; 
  hind 
  tibiae 
  without 
  a 
  distinct 
  row. 
  Wings 
  with 
  a 
  distinct 
  

   costal 
  bristle 
  and 
  with 
  yellowish 
  veins 
  ; 
  the 
  distal 
  portions 
  of 
  the 
  2nd, 
  3rd 
  and 
  

   4th 
  veins 
  are 
  straight 
  and 
  slightly 
  divergent 
  ; 
  cross-veins 
  rather 
  close 
  together, 
  

   their 
  distance 
  being 
  shorter 
  than 
  the 
  length 
  of 
  the 
  straight 
  posterior 
  cross-vein, 
  

   and 
  the 
  anterior 
  cross-vein 
  being 
  placed 
  only 
  a 
  little 
  before 
  the 
  last 
  fourth 
  of 
  the 
  

   discoidal 
  cell 
  ; 
  lower 
  angle 
  of 
  the 
  anal 
  cell 
  rather 
  acute, 
  but 
  less 
  produced. 
  The 
  

   pattern 
  is 
  very 
  like 
  that 
  of 
  planifrons, 
  but 
  the 
  dark 
  patch 
  is 
  more 
  reduced, 
  not 
  

   extending 
  basally 
  beyond 
  the 
  stigma, 
  the 
  basal 
  portion 
  of 
  the 
  submarginal 
  cell 
  

   being 
  thus 
  hyaline, 
  and 
  the 
  point 
  of 
  the 
  bifurcation 
  of 
  the 
  2nd 
  and 
  3rd 
  veins 
  being 
  

   in 
  the 
  shape 
  of 
  a 
  conspicuous 
  black 
  callosity, 
  which 
  is 
  very 
  strikingly 
  developed, 
  

   while 
  in 
  planifrons 
  it 
  is 
  comprised 
  in 
  the 
  dark 
  patch. 
  The 
  hyaline 
  spots 
  at 
  the 
  

   apex 
  and 
  hind 
  border 
  of 
  the 
  wing 
  are 
  of 
  greater 
  size, 
  the 
  radiating 
  pattern 
  being 
  

   thus 
  more 
  developed 
  ; 
  the 
  discoidal 
  cell 
  is 
  almost 
  completely 
  hyaline 
  on 
  its 
  basal 
  

   half 
  ; 
  the 
  second 
  basal 
  cell 
  is 
  quite 
  hyaline 
  ; 
  the 
  dark 
  spot 
  at 
  the 
  lower 
  end 
  of 
  the 
  

   anal 
  cell 
  is 
  less 
  developed, 
  and 
  there 
  is 
  no 
  dark 
  spot 
  at 
  all 
  below 
  the 
  end 
  of 
  the 
  6th 
  

   vein. 
  

  

  Type 
  (J, 
  a 
  single, 
  rather 
  damaged 
  specimen 
  from 
  Natal, 
  Malvern, 
  v. 
  1897 
  

   (G. 
  A. 
  K. 
  Marshall). 
  

  

  The 
  wing 
  pattern 
  of 
  the 
  present 
  species 
  is 
  not 
  unlike 
  that 
  of 
  some 
  species 
  of 
  

   the 
  genus 
  Trypanea, 
  but 
  is 
  also 
  very 
  like 
  that 
  of 
  Euaresta 
  conjuncta, 
  Loew. 
  It 
  

   is 
  very 
  probable 
  that 
  the 
  present 
  species 
  may 
  be 
  galligenous, 
  like 
  E. 
  megacephala, 
  

   Loew, 
  which 
  in 
  Sicily 
  makes 
  very 
  conspicuous 
  galls 
  on 
  the 
  twigs 
  of 
  the 
  Composite 
  

   plant, 
  Inula 
  crithnoides 
  ; 
  * 
  it 
  is 
  therefore 
  possible 
  that 
  E. 
  megacephala, 
  

   E. 
  planifrons 
  and 
  E. 
  amplifrons 
  will 
  belong 
  to 
  a 
  natural 
  genus, 
  which 
  is 
  biologically 
  

   characterized 
  by 
  the 
  faculty 
  of 
  making 
  so-called 
  pleurocecidia 
  on 
  Composite 
  plants, 
  

   a 
  character 
  rather 
  uncommon 
  in 
  the 
  present 
  group 
  of 
  flower-head 
  flies. 
  

  

  * 
  T.De 
  Stefani 
  Perez, 
  Marcellia, 
  Avellino, 
  iii, 
  1904, 
  pp. 
  122-125 
  ; 
  Trotter 
  e 
  Cecconi, 
  

   Cecidotheca 
  italica, 
  Fasc. 
  xiv, 
  no. 
  326 
  (1906); 
  C. 
  Houard, 
  Les 
  Zoocecidies 
  des 
  Plantes 
  

   d'Europe, 
  etc. 
  ii, 
  1909, 
  p. 
  972, 
  no. 
  5627. 
  

  

  