﻿OXYPTILUS 
  PARVIDACTYLA. 
  

  

  425 
  

  

  trapezoidals 
  are 
  well 
  separated, 
  ii 
  having 
  the 
  longest 
  hair 
  ; 
  iii 
  has 
  a 
  

   very 
  long 
  hair, 
  nearly 
  025mm. 
  long 
  ; 
  iv 
  and 
  v, 
  the 
  anterior 
  'v) 
  much 
  

   the 
  higher, 
  and 
  with 
  the 
  shorter 
  hair; 
  long 
  hairs 
  also 
  at 
  posterior 
  ex- 
  

   tremity. 
  Later, 
  it 
  is 
  still 
  about 
  1mm. 
  in 
  length, 
  with 
  dark 
  head, 
  but 
  other- 
  

   wise 
  only 
  slightly, 
  if 
  at 
  all, 
  tinted 
  with 
  yellowish. 
  It 
  has 
  long 
  colourless 
  

   hairs, 
  that 
  on 
  tubercle 
  ii 
  on 
  the 
  last 
  segment 
  being 
  about 
  0'3mm. 
  long. 
  

   The 
  hair 
  on 
  i 
  is 
  comparatively 
  short, 
  about 
  O05mm. 
  long, 
  straight, 
  

   porrected, 
  a 
  little 
  swollen, 
  and 
  perhaps 
  inclined 
  to 
  be 
  bifid 
  at 
  the 
  tip 
  ; 
  

   that 
  on 
  ii 
  is 
  directed 
  upwards 
  and 
  backwards 
  in 
  a 
  flowing 
  curve, 
  at 
  

   least 
  on 
  the 
  abdominal 
  segments 
  ; 
  that 
  on 
  iii 
  is 
  a 
  long 
  hair, 
  directed 
  

   outwards 
  and 
  slightly 
  forwards, 
  about 
  0-27mm. 
  long 
  ; 
  those 
  on 
  iv 
  and 
  

   v 
  are 
  shorter, 
  the 
  front 
  one 
  much 
  higher 
  than 
  the 
  posterior, 
  and 
  on 
  a 
  

   separate 
  base, 
  rather 
  shorter 
  than 
  the 
  posterior 
  one, 
  which 
  is 
  about 
  

   017mm. 
  long, 
  and 
  is 
  directed 
  outwards 
  (hardly 
  backwards); 
  the 
  lower 
  

   setae 
  are 
  a 
  short 
  hair, 
  and 
  a 
  very 
  short 
  one, 
  apparently 
  vii, 
  at 
  base 
  of 
  

   prolegs. 
  The 
  prothoracic 
  and 
  8th 
  abdominal 
  spiracles 
  are 
  very 
  large 
  

   and 
  prominent 
  (Chapman, 
  July 
  15th, 
  1905). 
  The 
  newly-hatched 
  

   larva 
  measures 
  l-2mm. 
  in 
  length. 
  The 
  body 
  is 
  fairly 
  cylindrical, 
  but 
  

   tapers 
  towards 
  the 
  anal 
  extremity. 
  Segmental 
  divisions 
  well-marked. 
  

   The 
  spiracles 
  are 
  large 
  and 
  elevated. 
  The 
  tubercles 
  are 
  also 
  large, 
  

   especially 
  iii. 
  The 
  very 
  long 
  hairs 
  are 
  conspicuous, 
  especially 
  at 
  the 
  

   anal 
  extremity. 
  The 
  head 
  is 
  large 
  (width 
  about 
  0-2mm.) 
  and 
  rather 
  

   flat 
  ; 
  shining 
  brown 
  with 
  a 
  strong 
  ochreous 
  tinge 
  ; 
  the 
  borders 
  of 
  the 
  

   clypeus 
  very 
  dark 
  brown. 
  Body 
  of 
  the 
  larva 
  bright 
  yellow-ochreous. 
  

   The 
  thoracic 
  shield 
  dark 
  ochreous. 
  A 
  plate 
  on 
  the 
  dorsum 
  of 
  the 
  9th 
  

   abdominal 
  segment, 
  and 
  the 
  anal 
  shield, 
  very 
  dark, 
  almost 
  black. 
  The 
  

   tubercles 
  are 
  dark, 
  and 
  the 
  hairs 
  grey 
  (semitransparent). 
  There 
  are 
  

   some 
  dark 
  ochreous 
  markings 
  in 
  the 
  dorsal 
  and 
  lateral 
  areas. 
  The 
  legs 
  

   are 
  long, 
  but 
  the 
  claspers 
  are 
  rather 
  short, 
  and 
  have 
  no 
  crotchets 
  except 
  

   the 
  anal 
  pair, 
  which 
  has 
  three, 
  or 
  sometimes 
  only 
  two, 
  black 
  ones 
  on 
  

   each 
  clasper. 
  hirst 
  instar 
  (7-| 
  days 
  old) 
  : 
  Length 
  about 
  l*6mm. 
  Head 
  

   dark 
  brown, 
  body 
  stout, 
  paler 
  than 
  when 
  newly-hatched, 
  and 
  more 
  maggot- 
  

   like. 
  Thehairsmuch 
  covered 
  with 
  dirt 
  (? 
  the 
  dried 
  juice 
  of 
  the 
  Hieracium), 
  

   The 
  head 
  carries 
  two 
  long 
  hairs, 
  one 
  on 
  each 
  of 
  the 
  lobes 
  near 
  the 
  

   clypeus, 
  and 
  a 
  few 
  shorter 
  ones. 
  The 
  skin 
  of 
  the 
  body 
  is 
  covered 
  with 
  

   spicules. 
  The 
  prothoracic 
  shield 
  has 
  a 
  front 
  row 
  of 
  hairs, 
  the 
  two 
  outer- 
  

   most 
  being 
  the 
  longest, 
  and 
  there 
  are 
  two 
  very 
  long 
  hairs 
  on 
  its 
  

   posterior 
  border. 
  All 
  the 
  tubercles 
  are 
  simple 
  and 
  separate, 
  but 
  i 
  and 
  

   ii 
  are 
  close 
  together, 
  and 
  so 
  are 
  iv 
  and 
  v. 
  On 
  the 
  meso- 
  and 
  meta- 
  

   thorax 
  i, 
  ii, 
  and 
  iii 
  are 
  more 
  or 
  less 
  in 
  a 
  line. 
  On 
  the 
  abdominal 
  

   segments, 
  i 
  and 
  ii 
  are 
  always 
  very 
  close 
  together. 
  All 
  the 
  hairs 
  are 
  

   smooth, 
  i 
  carries 
  a 
  short 
  hair 
  (0-06mm.), 
  flattened 
  at 
  the 
  tip 
  and 
  distinctly 
  

   notched. 
  This 
  hair 
  is 
  directed 
  forwards, 
  even 
  on 
  the 
  8th 
  abdominal 
  

   segment, 
  and 
  therefore 
  soon 
  gets 
  spoilt, 
  or 
  even 
  broken, 
  when 
  the 
  larva 
  

   takes 
  to 
  burrowing. 
  Most 
  of 
  the 
  other 
  hairs 
  run 
  to 
  a 
  fine 
  point, 
  ii 
  

   carries 
  a 
  long 
  hair, 
  about 
  0'2nim., 
  directed 
  forwards 
  on 
  the 
  thorax 
  and 
  

   backwards 
  on 
  the 
  abdomen 
  ; 
  iii 
  carries 
  also 
  a 
  long 
  hair, 
  about 
  0*2mm., 
  

   and, 
  on 
  the 
  meso- 
  and 
  metathorax, 
  iii 
  has 
  a 
  very 
  small 
  tubercle 
  earning 
  

   a 
  very 
  short 
  hair 
  close 
  behind 
  it. 
  ; 
  iv 
  and 
  v 
  are 
  both 
  subspiracular, 
  the 
  front 
  

   one 
  (v) 
  having 
  a 
  short 
  hair 
  directed 
  forwards, 
  and 
  the 
  other 
  (iv) 
  a 
  longer 
  

   hair 
  directed 
  backwards. 
  I 
  believe 
  vi 
  to 
  be 
  absent, 
  but 
  vii 
  is 
  represented 
  

   by 
  one 
  small 
  tubercle 
  with 
  a 
  very 
  short 
  hair, 
  and, 
  just 
  behind 
  it, 
  a 
  

   larger 
  tubercle 
  with 
  a 
  much 
  longer 
  hair. 
  There 
  are 
  no 
  properly 
  80-oalled 
  

  

  