﻿B48 
  Transactions.-— 
  Zoolugtj. 
  

  

  forming 
  a 
  wonderfully 
  close 
  imitation 
  of 
  the 
  natural 
  bark 
  of 
  the 
  tree. 
  

   Beneath 
  this 
  covering 
  is 
  seen 
  a 
  cavity, 
  the 
  depth 
  of 
  which 
  varies 
  from 
  a 
  

   quarter 
  to 
  half 
  an 
  inch, 
  and 
  rather 
  above 
  the 
  centre 
  of 
  the 
  cavity 
  is 
  the 
  

   entrance 
  to 
  the 
  burrow. 
  The 
  cavity 
  around 
  the 
  entrance 
  of 
  the 
  biuTow 
  is 
  

   used 
  by 
  the 
  larva 
  to 
  turn 
  itself 
  in. 
  The 
  burrow 
  at 
  first 
  takes 
  a 
  course 
  

   iu 
  wards 
  and 
  upwards 
  for 
  one, 
  two, 
  or 
  more 
  inches 
  ; 
  this 
  upward 
  inchnation 
  

   preventing 
  the 
  entrance 
  of 
  water. 
  Then 
  the 
  burrow 
  turns 
  downward 
  in 
  a 
  

   nearly 
  vertical 
  direction. 
  This 
  vertical 
  portion 
  of 
  the 
  burrow 
  varies 
  in 
  

   length 
  according 
  to 
  the 
  age 
  of 
  the 
  larva. 
  That 
  of 
  a 
  full-grown 
  larva 
  is 
  about 
  

   four 
  or 
  five 
  inches 
  long. 
  I 
  have 
  seen 
  them 
  eight 
  inches 
  and 
  proportionally 
  

   wide. 
  I 
  have 
  ascertained 
  positively 
  that 
  the 
  larva 
  frequently 
  inhabits 
  the 
  

   same 
  burrow 
  for 
  more 
  than 
  two 
  years, 
  and 
  I 
  am 
  of 
  opinion 
  that 
  they 
  

   generally 
  keep 
  to 
  the 
  same 
  burrow 
  during 
  the 
  whole 
  larval 
  stage. 
  But 
  I 
  

   have 
  occasionally 
  found 
  larvae 
  in 
  termiaal 
  shoots 
  which 
  would 
  not 
  admit 
  

   of 
  theti' 
  attaining 
  fall 
  growth, 
  and 
  consequently 
  they 
  must 
  in 
  these 
  cases 
  

   change 
  their 
  ground. 
  

  

  When 
  the 
  larva 
  has 
  attained 
  its 
  full 
  size, 
  it 
  spins, 
  at 
  the 
  top 
  of 
  the 
  

   vertical 
  portion 
  of 
  its 
  burrow, 
  a 
  contrivance 
  very 
  much 
  resembling 
  that 
  of 
  

   the 
  Trap-door 
  Spider, 
  as 
  an 
  additional 
  security 
  against 
  its 
  foes 
  during 
  the 
  

   pupa 
  state. 
  

  

  The 
  imago 
  emerges 
  m 
  October 
  and 
  November. 
  The 
  best 
  time 
  to 
  obtain 
  

   the 
  pupa 
  is 
  in 
  September 
  and 
  the 
  early 
  part 
  of 
  October. 
  It 
  is 
  easy 
  to 
  

   ascertain 
  if 
  the 
  insect 
  in 
  a 
  burrow 
  is 
  in 
  the 
  larval 
  or 
  pupa 
  stage, 
  for, 
  if 
  the 
  

   exterior 
  web 
  is 
  torn 
  off, 
  the 
  larva, 
  if 
  inside, 
  will 
  replace 
  it 
  by 
  the 
  next 
  day. 
  

  

  The 
  larva 
  is 
  flesh-coloured, 
  tinted 
  "with 
  purple 
  ; 
  head 
  dark 
  brown, 
  with 
  

   a 
  few 
  strong 
  bristles 
  ; 
  spiracles 
  black; 
  segment 
  next 
  the 
  head 
  darker 
  than 
  

   the 
  rest, 
  horny, 
  with 
  a 
  large 
  black 
  mark 
  on 
  each 
  side, 
  just 
  above 
  the 
  spiracle. 
  

   The 
  pupa 
  is 
  flesh-coloured, 
  inclining 
  to 
  biiek 
  red; 
  head 
  and 
  thorax 
  deep 
  

   chestnut 
  brown. 
  The 
  semi-transparent 
  mng-cases 
  show 
  the 
  markings 
  of 
  the 
  

   future 
  imago. 
  

  

  I 
  have 
  examined 
  these 
  larv® 
  and 
  pupa3 
  in 
  their 
  difi'erent 
  stages 
  up 
  to 
  

   the 
  time 
  when 
  by 
  stripping 
  off 
  the 
  pupa 
  case, 
  just 
  before 
  the 
  insect 
  was 
  

   ready 
  to 
  emerge, 
  the 
  easily 
  recognised 
  Lliaraijia 
  virescens 
  was 
  disclosed. 
  

  

  I 
  do 
  not 
  think 
  that 
  the 
  larva 
  of 
  C. 
  virescens 
  is 
  the 
  larva 
  which 
  is 
  

   attacked 
  by 
  the 
  fungus 
  Cordiceps 
  ruhertsii. 
  Not 
  only 
  do 
  the 
  two 
  larvte 
  differ 
  

   in 
  the 
  size 
  of 
  the 
  head 
  and 
  shape 
  of 
  the 
  body 
  — 
  the 
  larva 
  of 
  C. 
  virescens 
  

   being 
  more 
  cylindrical 
  and 
  with 
  proportionately 
  a 
  larger 
  head 
  — 
  but 
  I 
  do 
  not 
  

   see 
  how 
  C. 
  virescens 
  could 
  get 
  into 
  the 
  ground, 
  which 
  is 
  the 
  position 
  in 
  

   which 
  the 
  larva, 
  which 
  is 
  attacked 
  by 
  the 
  fungus, 
  always 
  is 
  found. 
  I 
  think 
  

   that 
  the 
  fungus-attacked 
  larva 
  is 
  probably 
  a 
  Porina. 
  

  

  