﻿238 
  PEOF. 
  M. 
  BEZZI. 
  

  

  Xanthorrhachista, 
  Hendel, 
  1914. 
  

   Xanthorrhachista 
  alata, 
  Becker, 
  1910. 
  

  

  In 
  my 
  previous 
  paper 
  I 
  overlooked 
  the 
  description 
  of 
  Acidia 
  alata, 
  Beck. 
  (Ann. 
  

   Soc. 
  Ent. 
  France, 
  1910, 
  p. 
  28), 
  with 
  which 
  Xanthorrhachista 
  cephalia, 
  Hend. 
  (1914), 
  

   is 
  undoubtedly 
  synonymous. 
  

  

  Themarictera, 
  Hendel, 
  1914. 
  

  

  To 
  the 
  characters 
  of 
  the 
  genus 
  on 
  p. 
  243 
  of 
  the 
  first 
  paper 
  must 
  be 
  added 
  : 
  

   No 
  oc. 
  ; 
  two 
  pairs 
  of 
  vt. 
  ; 
  two 
  s. 
  or. 
  and 
  two 
  *. 
  or. 
  ; 
  pvt. 
  well 
  developed 
  ; 
  genal 
  

   bristle 
  thin 
  ; 
  ocp. 
  long 
  and 
  acute, 
  black. 
  Sep. 
  long, 
  the 
  middle 
  ones 
  approximated 
  ; 
  

   no 
  pt. 
  ; 
  st. 
  very 
  short 
  and 
  thin, 
  not 
  properly 
  wanting, 
  as 
  stated 
  by 
  Hendel 
  ; 
  three 
  

   p. 
  sa., 
  the 
  inner 
  one 
  thinner. 
  

  

  Themarictera 
  laticeps, 
  Loew, 
  1861. 
  

  

  Closely 
  allied 
  to 
  T. 
  flaveolata, 
  F., 
  but 
  differing 
  in 
  the 
  presence 
  of 
  two 
  hyaline 
  

   spots, 
  one 
  in 
  the 
  submarginal 
  and 
  one 
  in 
  the 
  first 
  basal 
  cell. 
  The 
  first 
  of 
  these 
  spots 
  

   is 
  placed 
  on 
  the 
  limit 
  between 
  the 
  brown 
  and 
  the 
  yellow 
  pattern, 
  beginning 
  at 
  the 
  

   third 
  longitudinal 
  vein 
  just 
  beyond 
  the 
  small 
  cross- 
  vein, 
  and 
  extending 
  above 
  

   nearly 
  to 
  the 
  middle 
  curve 
  of 
  the 
  second 
  vein 
  ; 
  in 
  this 
  way 
  is 
  formed 
  the 
  black 
  

   indentation, 
  which 
  is 
  exaggerated 
  in 
  Loew's 
  original 
  figure. 
  The 
  second 
  hyaline 
  

   spot 
  is 
  before 
  the 
  small 
  cross- 
  vein 
  ; 
  it 
  is 
  ovate 
  in 
  shape, 
  and 
  extends 
  from 
  the 
  third 
  

   to 
  the 
  fourth 
  vein. 
  These 
  two 
  spots 
  are 
  distinctly 
  whitish, 
  like 
  the 
  basal 
  streaks, 
  

   as 
  described 
  by 
  Loew. 
  In 
  the 
  rest 
  the 
  unknown 
  male 
  is 
  very 
  like 
  the 
  female 
  ; 
  

   the 
  genitalia 
  are 
  rounded, 
  not 
  prominent, 
  entirely 
  shining 
  yellow 
  ; 
  the 
  last 
  

   abdominal 
  segment 
  has 
  numerous 
  black 
  bristles. 
  The 
  eyes 
  are 
  green, 
  with 
  two 
  

   purplish 
  cross 
  bands, 
  converging 
  anteriorly, 
  on 
  the 
  upper 
  half. 
  

  

  A 
  male 
  specimen 
  from 
  Natal, 
  Durban, 
  xi.1916 
  '' 
  reared 
  from 
  native 
  fruit 
  ' 
  

   (C. 
  P. 
  van 
  der 
  Merwe, 
  Agric. 
  Dept. 
  S. 
  Africa). 
  This 
  specimen 
  is 
  an 
  aberrant 
  one, 
  

   or 
  is 
  not 
  fully 
  coloured 
  in 
  the 
  wing 
  pattern, 
  hyaline 
  streaks 
  being 
  present 
  in 
  the 
  

   ends 
  of 
  the 
  marginal, 
  submarginal 
  and 
  discoidal 
  cells 
  and 
  the 
  whole 
  middle 
  of 
  

   the 
  first 
  posterior 
  cell 
  ; 
  the 
  fuscous 
  pattern 
  is 
  thus 
  restricted 
  to 
  some 
  broad 
  

   borders 
  on 
  the 
  longitudinal 
  and 
  cross-veins. 
  

  

  Puparium. 
  To 
  the 
  reared 
  specimen 
  is 
  attached 
  a 
  puparium, 
  which 
  seems 
  to 
  be 
  

   rather 
  small 
  for 
  such 
  a 
  fly 
  ; 
  it 
  measures 
  6 
  mm. 
  only 
  in 
  length, 
  while 
  the 
  adult 
  fly 
  

   is 
  about 
  9 
  mm. 
  long. 
  It 
  is 
  of 
  a 
  dark 
  reddish-brown 
  colour 
  and 
  has 
  a 
  rather 
  hard 
  

   and 
  thick 
  skin 
  ; 
  the 
  segmentation 
  lines 
  are 
  not 
  impressed 
  ; 
  the 
  broadened 
  areas 
  

   of 
  the 
  ventral 
  side 
  are 
  not 
  prominent 
  ; 
  the 
  posterior 
  spiracles 
  are 
  very 
  approximated, 
  

   the 
  surrounding 
  parts 
  being 
  of 
  a 
  blackish 
  colour. 
  The 
  surface 
  is 
  smooth, 
  but 
  quite 
  

   opaque. 
  

  

  Rhacochlaena, 
  Loew, 
  1862. 
  

   The 
  Ethiopian 
  species 
  of 
  the 
  present 
  genus, 
  with 
  the 
  addition 
  of 
  the 
  new 
  one, 
  

   may 
  be 
  distinguished 
  as 
  follows 
  : 
  

  

  1(2). 
  Wings 
  destitute 
  of 
  a 
  broad 
  apical 
  fuscous 
  band, 
  the 
  first 
  and 
  second 
  posterior 
  

   cells 
  being 
  almost 
  completely 
  hyaline 
  . 
  . 
  . 
  . 
  . 
  . 
  fasciolata, 
  Lw. 
  

  

  