﻿Natural 
  His 
  tort/ 
  of 
  British 
  Microlepidoptera. 
  123 
  

  

  (The 
  figure 
  was 
  made 
  from 
  a 
  specimen 
  from 
  which 
  the 
  moth 
  was 
  

   about 
  to 
  emerge, 
  and 
  the 
  markings 
  on 
  the 
  wings 
  are 
  seen 
  through 
  

   their 
  cases.) 
  The 
  pupa 
  is 
  formed 
  within 
  the 
  rained 
  place, 
  in 
  a 
  

   dark 
  greenish 
  brown, 
  bluntly 
  pointed, 
  oval 
  cocoon, 
  of 
  silk 
  (PI. 
  

  

  XIII. 
  fig. 
  3 
  d), 
  which 
  is 
  either 
  loose 
  or 
  slightly 
  attached 
  to 
  the 
  

   leaf. 
  

  

  Imago 
  (PI. 
  XIII. 
  fig. 
  3). 
  —Found 
  in 
  May 
  and 
  August. 
  

  

  Genus 
  Gracillaria, 
  Haworth. 
  (PI. 
  XIV.) 
  

  

  The 
  most 
  striking 
  characteristics 
  of 
  this 
  genus 
  are 
  the 
  general 
  

   slenderness, 
  the 
  length 
  of 
  the 
  antennae, 
  the 
  length 
  and 
  narrowness 
  

   of 
  the 
  anterior 
  wings, 
  the 
  development 
  of 
  the 
  maxillary 
  as 
  well 
  as 
  

   the 
  labial 
  palpi, 
  and 
  the 
  position 
  of 
  the 
  moths 
  in 
  repose 
  — 
  sitting 
  

   with 
  the 
  fore 
  legs 
  advanced, 
  the 
  head 
  elevated, 
  the 
  antennae 
  laid 
  

   back 
  under 
  the 
  wings, 
  and 
  the 
  apices 
  of 
  the 
  anterior 
  wings 
  

   touching 
  the 
  surface 
  on 
  which 
  they 
  sit. 
  Haworth 
  has 
  briefly 
  

   characterised 
  the 
  genus 
  (Lep. 
  Brit. 
  527, 
  183S) 
  ; 
  Zeller 
  more 
  

   fully 
  (Lin. 
  Ent. 
  ii. 
  313); 
  and 
  also 
  Stainton 
  (Trans. 
  Ent. 
  Soe. 
  i. 
  

   N. 
  S. 
  115). 
  Mr, 
  Curtis 
  has 
  given 
  the 
  characters, 
  founded 
  on 
  

   dissections 
  of 
  G. 
  Syr'mgella, 
  of 
  which 
  he 
  has 
  also 
  figured 
  the 
  

   preparatory 
  states 
  (Brit. 
  Ent. 
  PI. 
  479). 
  

  

  The 
  larvae 
  feed 
  on 
  the 
  leaves 
  of 
  various 
  plants, 
  probably 
  all 
  the 
  

   species 
  in 
  the 
  first 
  instance, 
  as 
  miners 
  ; 
  then 
  each 
  rolls 
  a 
  leaf 
  into 
  

   the 
  form 
  of 
  a 
  cone, 
  at 
  least 
  the 
  greater 
  number 
  of 
  species 
  do 
  so, 
  

   and 
  feed 
  within 
  it. 
  Some 
  species 
  are 
  always 
  miners. 
  These 
  

   larvae 
  have 
  but 
  six 
  ventral 
  legs. 
  

  

  The 
  pupa 
  is 
  enveloped 
  in 
  a 
  cocoon, 
  

  

  Gracillaria 
  Franckella,, 
  Hiibner, 
  Zeller, 
  Stainton. 
  (Trans. 
  Ent. 
  

   Soc. 
  i. 
  N. 
  S. 
  118.) 
  

  

  Larva 
  (PI. 
  XIV. 
  fig. 
  1 
  a). 
  — 
  Length 
  3 
  lines. 
  — 
  Greenish 
  white, 
  

   semi-transparent, 
  slightly 
  hairy, 
  the 
  dark 
  green 
  of 
  the 
  dorsal 
  

   vessel 
  showing 
  conspicuously 
  through. 
  Head 
  yellowish, 
  the 
  

   mouth 
  and 
  two 
  spots 
  on 
  the 
  inferior 
  side 
  brown. 
  The 
  six 
  pec- 
  

   toral, 
  six 
  ventral, 
  and 
  two 
  anal 
  legs 
  the 
  colour 
  of 
  the 
  body. 
  

   Curls 
  up 
  the 
  end 
  of 
  one 
  of 
  the 
  lobes 
  of 
  leaves 
  of 
  the 
  oak 
  (PI. 
  

  

  XIV. 
  fig. 
  1 
  6), 
  in 
  which 
  it 
  feeds, 
  discolouring 
  its 
  habitation, 
  and 
  

   removing 
  to 
  other 
  leaves 
  several 
  times 
  in 
  succession. 
  Found 
  in 
  

   August, 
  September, 
  and 
  October. 
  

  

  Pupa, 
  in 
  a 
  cocoon 
  attached 
  to 
  a 
  leaf. 
  

  

  Imago 
  (PI. 
  XIV. 
  fig. 
  1). 
  — 
  Found 
  in 
  September 
  and 
  October, 
  

   and 
  hybernated 
  specimens 
  from 
  April 
  to 
  June. 
  

  

  