﻿418 
  

  

  Dr. 
  A. 
  Jefferis 
  Turner 
  on 
  

  

  its 
  apical 
  wall. 
  Mimychryta 
  is 
  remarkable 
  for 
  the 
  develop- 
  

   ment 
  of 
  a 
  strong 
  spiral 
  proboscis, 
  which 
  is 
  completely 
  absent 
  

   in 
  all 
  the 
  preceding 
  genera. 
  Both 
  Gephyroneurn 
  and 
  Mimy- 
  

   chryta 
  are 
  of 
  comparatively 
  small 
  size 
  (25 
  to 
  35 
  mm.), 
  and 
  

   possess 
  a 
  strong 
  basal 
  costal 
  expansion 
  of 
  the 
  hind-wing, 
  

   similar 
  to 
  that 
  found 
  in 
  the 
  Lasiocampidae, 
  but 
  with 
  a 
  strong 
  

   frenulum 
  present 
  in 
  the 
  ($. 
  In 
  the 
  only 
  $ 
  {Munychryta 
  

   sp.) 
  that 
  I 
  possess 
  the 
  frenulum 
  appears 
  to 
  be 
  absent. 
  

  

  The 
  Anlhelidae 
  are 
  an 
  Austrahan 
  family. 
  So 
  far 
  as 
  

   known 
  no 
  species 
  occurs 
  outside 
  the 
  Australian 
  region. 
  

   A 
  few 
  species 
  of 
  Anfhela 
  are 
  known 
  from 
  New 
  Guinea. 
  

  

  I 
  interpret 
  these 
  facts 
  as 
  follows. 
  In 
  the 
  primitive 
  

   Lepidoptera 
  Heteroneura 
  all 
  the 
  veins 
  from 
  the 
  areole 
  arose 
  

   separately, 
  the 
  areole 
  being 
  completed 
  by 
  a 
  short 
  cross- 
  

   vein 
  running 
  from 
  9 
  to 
  8, 
  as 
  occurs 
  in 
  the 
  more 
  primitive 
  

  

  /«? 
  ? 
  

  

  Fig. 
  G. 
  — 
  Apex 
  of 
  fore-wing, 
  

   Gephyroneura 
  sp. 
  

  

  Fig. 
  7.- 
  — 
  Apex 
  of 
  fore- 
  wing, 
  

   Munychryta 
  senicula 
  Wlk. 
  

  

  Cossidae. 
  With 
  more 
  active 
  habits 
  of 
  flight 
  in 
  large- 
  

   winged 
  moths 
  a 
  necessity 
  arose 
  for 
  strengthening 
  the 
  scaf- 
  

   folding 
  of 
  the 
  apex 
  of 
  the 
  fore-wing. 
  This 
  was 
  attempted 
  

   in 
  two 
  ways, 
  by 
  a 
  lengthening 
  of 
  the 
  areole, 
  and 
  by 
  an 
  

   approximation 
  of 
  the 
  veins 
  running 
  from 
  the 
  areole 
  towards 
  

   the 
  apex, 
  with 
  a 
  coalescence 
  of 
  their 
  stalks. 
  Both 
  changes 
  

   may 
  be 
  observed 
  in 
  the 
  neuration 
  of 
  the 
  Cossidae 
  (Trans. 
  

   Ent. 
  Soc, 
  1918, 
  p. 
  155). 
  In 
  the 
  more 
  speciahsed 
  families 
  

   one 
  of 
  these 
  lines 
  of 
  evolution 
  was 
  followed 
  to 
  the 
  exclusion 
  

   of 
  the 
  other. 
  In 
  most 
  as 
  in 
  the 
  Liparidae 
  there 
  was 
  stalking 
  

   of 
  the 
  radial 
  veins, 
  the 
  areole 
  remaining 
  short, 
  and 
  tending 
  

   to 
  dwindle 
  and 
  disappear. 
  In 
  the 
  Anthelidae 
  — 
  and 
  this 
  is 
  

   the 
  justification 
  for 
  regarding 
  them 
  as 
  a 
  distinct 
  family 
  — 
  

   the 
  veins 
  remained 
  separate 
  though 
  approximated 
  as 
  the 
  

   areole 
  grew 
  longer. 
  The 
  ancestral 
  Anthelidae 
  I 
  imagine 
  

   to 
  have 
  been 
  moths 
  of 
  large 
  size, 
  hke 
  Chelepteryx 
  or 
  larger, 
  

   and 
  in 
  them 
  this 
  mechanism 
  was 
  not 
  sufficient 
  to 
  give 
  the 
  

   necessary 
  strength. 
  As 
  a 
  consequence 
  a 
  strong 
  obhque 
  

  

  