﻿GILLMERIA 
  PALLIDACTYLA. 
  243 
  

  

  a 
  detailed 
  description) 
  (Bacot). 
  Penultimate 
  instar 
  (May 
  8th, 
  1904) 
  : 
  

   Short, 
  stout, 
  heavy, 
  of 
  the 
  Platyptilia 
  (gonodactyla) 
  type. 
  Head 
  of 
  

   medium 
  size, 
  rounded, 
  of 
  a 
  pale 
  colour. 
  Length 
  (when 
  crawling) 
  

   9mm. 
  to 
  10mm. 
  ; 
  width 
  slightly 
  exceeds 
  2mm. 
  ; 
  a 
  rather 
  longer, 
  

   more 
  marked, 
  tapering 
  occurs 
  towards 
  anus 
  than 
  towards 
  head 
  ; 
  roughly 
  

   cylindrical, 
  with 
  a 
  small 
  but 
  distinct 
  lateral 
  flange 
  ; 
  when 
  at 
  rest 
  or 
  

   feeding, 
  it 
  retracts 
  itself 
  considerably, 
  the 
  tapering 
  being 
  then 
  short 
  

   and 
  abrupt. 
  There 
  are 
  at 
  least 
  3 
  subdivisions 
  to 
  meso- 
  and 
  metathorax 
  ; 
  

   and 
  at 
  least 
  three, 
  or 
  possibly 
  four, 
  to 
  each 
  abdominal 
  segment, 
  two 
  

   small 
  anterior 
  ones, 
  and 
  another 
  small 
  posterior 
  one 
  after 
  a 
  large 
  

   central 
  one, 
  but 
  the 
  larva 
  is 
  so 
  active 
  that 
  this 
  will 
  need 
  confirmation. 
  

   The 
  segments 
  are 
  distinct, 
  and 
  the 
  incisions 
  clear, 
  but 
  the 
  latter 
  are 
  

   not 
  deep, 
  nor 
  are 
  the 
  segments 
  greatly 
  swelled 
  as 
  in 
  some 
  of 
  the 
  species. 
  

   Jn 
  its 
  general 
  outward 
  appearance, 
  the 
  larva 
  is 
  not 
  unlike 
  a 
  small 
  

   larva 
  of 
  one 
  of 
  the 
  Satyrids 
  ; 
  this 
  effect 
  is 
  chiefly 
  due 
  to 
  the 
  alternate 
  

   dark 
  and 
  light 
  stripes, 
  with 
  which 
  it 
  is 
  coloured, 
  for 
  of 
  course, 
  the 
  

   small 
  neck-like 
  prothoracic 
  segment, 
  and 
  finely 
  tapered 
  anus, 
  with 
  its 
  

   two 
  prolongations, 
  are 
  wanting. 
  Head 
  rounded, 
  tolerably 
  smooth 
  and 
  

   shining, 
  but 
  hardly 
  polished; 
  colour 
  pale 
  semitransparent 
  yellow, 
  with 
  

   dark 
  brown 
  mouthparts, 
  and 
  a 
  dark 
  brown 
  or 
  black 
  patch 
  surrounding 
  

   the 
  ocelli; 
  it 
  can 
  be 
  partly 
  retracted 
  into 
  the 
  prothorax; 
  hairs 
  on 
  head 
  

   weak 
  and 
  pale 
  ; 
  the 
  prothoracic 
  shield 
  is 
  chitinous 
  in 
  appearance, 
  and 
  

   polished 
  ; 
  the 
  anal 
  plate 
  is 
  much 
  rougher, 
  as 
  regards 
  surface 
  ; 
  both 
  are 
  

   of 
  the 
  same 
  pale 
  yellow 
  colour 
  as 
  the 
  head 
  ; 
  the 
  body 
  is 
  pale 
  whitish, 
  

   with 
  just 
  a 
  tinge 
  of 
  yellow 
  in 
  it, 
  there 
  is 
  a 
  dark 
  mediodorsal 
  stripe 
  that 
  

   ends 
  just 
  short 
  of 
  the 
  scutellum 
  ; 
  a 
  similar 
  subdorsal 
  stripe, 
  and 
  a 
  very 
  

   broad 
  lateral 
  one 
  that 
  encloses 
  the 
  spiracles 
  within 
  its 
  area; 
  below 
  this 
  

   band, 
  the 
  lateral 
  flange 
  is 
  white, 
  and 
  there 
  is 
  another 
  narrow 
  stripe 
  of 
  

   the 
  same 
  colour 
  just 
  above 
  the 
  level 
  of 
  the 
  prolegs, 
  with 
  a 
  few 
  scattered 
  

   dark 
  markings 
  below 
  it; 
  the 
  ventral 
  area 
  is 
  entirely 
  pale; 
  both 
  the 
  legs 
  

   and 
  prolegs 
  are 
  pale, 
  the 
  latter 
  rather 
  long, 
  considering 
  that 
  the 
  larva 
  

   is 
  practically 
  a 
  burrowing 
  one. 
  The 
  skin 
  presents 
  a 
  fine 
  coat 
  of 
  minute 
  

   spicules, 
  and 
  also 
  a 
  coat 
  of 
  small 
  stiff 
  secondary 
  hairs 
  that 
  might 
  

   almost 
  be 
  called 
  bristles, 
  these 
  hairs 
  are 
  very 
  numerous 
  in 
  comparison 
  

   with 
  the 
  scattered 
  secondary 
  hairs 
  of 
  the 
  exposed 
  feeders 
  ; 
  both 
  the 
  

   hairs 
  and 
  the 
  spicules 
  assist 
  in 
  heightening 
  the 
  contrast 
  of 
  light 
  and 
  

   dark 
  stripes, 
  as 
  they 
  are 
  pale 
  on 
  the 
  former, 
  and 
  dark 
  on 
  the 
  latter. 
  

   The 
  primary 
  setae 
  are 
  quite 
  primitive 
  in 
  character, 
  save 
  that 
  their 
  bases 
  

   are 
  somewhat 
  large 
  and 
  conspicuous 
  ; 
  there 
  are 
  no 
  raised 
  skin 
  areas, 
  

   and 
  no 
  tendency 
  to 
  form 
  warts. 
  It 
  is 
  remarkable 
  that 
  all 
  the 
  primary 
  

   hairs 
  have 
  their 
  bases 
  situated 
  on 
  the 
  pale 
  areas. 
  The 
  bases 
  of 
  the 
  

   setae 
  are 
  black-rimmed, 
  while 
  the 
  hairs 
  themselves 
  are 
  pale 
  and 
  simple. 
  

   The 
  position 
  of 
  the 
  tubercles 
  on 
  the 
  meso- 
  and 
  metathoracic 
  segments 
  

   is 
  — 
  i 
  and 
  ii 
  some 
  little 
  way 
  apart 
  (further, 
  apparently, 
  than 
  in 
  P. 
  gono- 
  

   dactyla), 
  on 
  the 
  mesothorax 
  set 
  almost 
  exactly 
  transversely, 
  on 
  the 
  

   metathorax 
  very 
  slightly 
  obliquely, 
  with 
  i 
  slightly 
  to 
  the 
  front; 
  iii 
  and 
  

   iv 
  are 
  two 
  setae 
  some 
  little 
  distance 
  apart, 
  the 
  lower 
  hair 
  being 
  the 
  

   larger; 
  below 
  these, 
  and 
  slightly 
  posterior, 
  is 
  a 
  subprimary 
  seta, 
  while 
  

   still 
  lower, 
  but 
  almost 
  in 
  line 
  beneath, 
  or 
  slightly 
  anterior 
  to 
  iii 
  

   and 
  iv, 
  are 
  two 
  more 
  hairs, 
  a 
  strong 
  upper 
  v, 
  and 
  a 
  weak 
  lower 
  vi 
  ; 
  

   above 
  the 
  leg, 
  but 
  below 
  the 
  flange, 
  are 
  two 
  hairs, 
  a 
  large 
  posterior 
  and 
  

   a 
  smaller 
  anterior, 
  some 
  little 
  distance 
  apart, 
  these 
  form 
  tubercle 
  vii. 
  

   ■On 
  the 
  abdominal 
  segments, 
  i 
  and 
  ii 
  are 
  set 
  trapezoulally. 
  and 
  well 
  

  

  