﻿A 
  NEW 
  AUSTRALIAN 
  SPECIES 
  OF 
  RIOXA. 
  5 
  

  

  Rioxa, 
  but 
  differs 
  from 
  both 
  the 
  preceding 
  species 
  in 
  the 
  wing 
  pattern. 
  Froggatt 
  

   (Australian 
  Insects, 
  p. 
  308) 
  reports 
  it 
  as 
  a 
  Trypeta 
  as 
  follows 
  : 
  ' 
  A 
  larger 
  native 
  

   species 
  with 
  reddish 
  brown 
  head 
  and 
  thorax 
  ; 
  with 
  black 
  body 
  ; 
  with 
  beautifully 
  

   mottled 
  black 
  wings 
  having 
  the 
  base 
  and 
  sides 
  unclouded. 
  I 
  have 
  taken 
  it 
  on 
  the 
  

   trunks 
  of 
  wattle 
  trees 
  near 
  Bathurst, 
  N. 
  S. 
  Wales." 
  It 
  is 
  probable 
  that 
  this 
  species 
  

   is 
  different 
  from 
  that 
  of 
  Macquart 
  ; 
  the 
  habit 
  of 
  settling 
  on 
  trunks 
  of 
  trees 
  is 
  very 
  

   suggestive 
  of 
  that 
  of 
  the 
  new 
  species 
  here 
  described. 
  In 
  his 
  report 
  of 
  1909 
  Froggatt 
  

   has 
  briefly 
  compared 
  (p. 
  114) 
  this 
  T. 
  bicolor 
  with 
  his 
  own 
  species 
  T. 
  musae. 
  

  

  Macquart 
  in 
  the 
  above-cited 
  work 
  (1847, 
  p. 
  109 
  [93], 
  pi. 
  vi, 
  fig. 
  7) 
  has 
  also 
  described 
  

   from 
  Australia 
  (coll. 
  Bigot) 
  Tephrilis 
  lugubris, 
  which 
  is 
  likewise 
  possibly 
  a 
  Rioxa, 
  

   but 
  has 
  a 
  very 
  different 
  wing 
  pattern 
  and 
  body 
  coloration. 
  

  

  The 
  Trypeta 
  pornia 
  of 
  Walker 
  (List, 
  1849, 
  p. 
  1039), 
  from 
  Port 
  Stephenson, 
  is 
  also 
  

   probably 
  a 
  species 
  of 
  Rioxa. 
  

  

  It 
  would 
  be 
  interesting 
  to 
  know 
  if 
  the 
  reduced 
  cephalic 
  chaetotaxy 
  (by 
  the 
  want 
  

   of 
  the 
  second 
  upper 
  orbital 
  bristle) 
  is 
  a 
  character 
  of 
  the 
  true 
  Australian 
  species 
  of 
  

   Rioxa 
  ; 
  in 
  this 
  case 
  it 
  may 
  be 
  considered 
  of 
  generic 
  value, 
  chiefly 
  when 
  supported 
  

   by 
  such 
  a 
  different 
  kind 
  of 
  life-history 
  as 
  that 
  observed 
  for 
  the 
  new 
  species 
  T. 
  termi- 
  

   toxena. 
  

  

  Of 
  the 
  numerous 
  species 
  recorded 
  or 
  described 
  from 
  New 
  Guinea, 
  only 
  the 
  

   following 
  seem 
  to 
  belong 
  really 
  to 
  Rioxa 
  : 
  formosipennis, 
  Walker, 
  1861 
  ; 
  lateralis, 
  

   Kertesz, 
  1901 
  ; 
  sexguttata, 
  De 
  Meijere, 
  1913 
  ; 
  and 
  seriata, 
  De 
  Meijere, 
  1915 
  ; 
  but 
  

   they 
  all 
  have 
  a 
  wing 
  pattern 
  very 
  different 
  from 
  that 
  of 
  the 
  species 
  here 
  described. 
  

   The 
  other 
  species, 
  like 
  debeaufortii, 
  De 
  Meijere, 
  1906, 
  nigra, 
  De 
  Meijere, 
  1906, 
  

   insignis, 
  De 
  Meijere, 
  1913, 
  nigripennis, 
  De 
  Meijere, 
  1913, 
  and 
  jlava, 
  Edwards, 
  1915, 
  

   seem 
  to 
  belong 
  to 
  other 
  genera 
  ; 
  quadrifera, 
  Walker, 
  1861, 
  was 
  placed 
  by 
  Prof. 
  Hendel 
  

   in 
  his 
  new 
  genus 
  Themaro'ides 
  in 
  1914. 
  

  

  