﻿TENT 
  CATERPILLAR 
  — 
  SNODGRASS. 
  

  

  347 
  

  

  tine, 
  which 
  it 
  smears 
  all 
  over 
  the 
  inner 
  surface 
  of 
  the 
  case, 
  but 
  the 
  

   substance 
  spreads 
  through 
  the 
  meshes 
  of 
  the 
  silk, 
  where 
  it 
  quickly 
  

   dries 
  and 
  gives 
  the 
  starchy 
  stiffness 
  to 
  the 
  walls 
  of 
  the 
  finished 
  

   cocoon. 
  It 
  readily 
  crumbles 
  into 
  a 
  yellow 
  powder, 
  which 
  becomes 
  

   dusted 
  all 
  over 
  the 
  caterpillar 
  within 
  and 
  floats 
  off 
  in 
  a 
  small 
  yellow 
  

   cloud 
  whenever 
  a 
  cocoon 
  is 
  pulled 
  loose 
  from 
  its 
  attachments. 
  

  

  The 
  cocoon 
  is 
  the 
  last 
  resting 
  place 
  of 
  the 
  caterpillar. 
  If 
  the 
  

   caterpillar 
  lives 
  it 
  will 
  come 
  out 
  of 
  its 
  prison 
  as 
  a 
  moth, 
  leaving 
  the 
  

   garments 
  of 
  the 
  worm 
  behind. 
  It 
  may, 
  however, 
  be 
  attacked 
  by 
  para- 
  

   sites 
  that 
  will 
  shortly 
  bring 
  about 
  its 
  destruction. 
  But 
  even 
  if 
  it 
  

   goes 
  through 
  the 
  period 
  of 
  change 
  successfully 
  it 
  must 
  remain 
  in 
  

   the 
  cocoon 
  about 
  three 
  weeks. 
  In 
  the 
  meantime 
  it 
  will 
  be 
  of 
  interest 
  

   to 
  learn 
  something 
  of 
  the 
  structure 
  of 
  a 
  caterpillar, 
  the 
  better 
  to 
  

   understand 
  its 
  physiology 
  and 
  some 
  of 
  the 
  details 
  of 
  the 
  process 
  of 
  its 
  

   transformation. 
  

  

  THE 
  STRUCTURE 
  AND 
  PHYSIOLOGY 
  OP 
  THE 
  CATERPILLAR. 
  

  

  A 
  caterpillar 
  looks 
  like 
  a 
  worm, 
  but 
  it 
  is 
  not 
  a 
  worm. 
  It 
  is 
  a 
  young 
  

   moth 
  that 
  has 
  carried 
  the 
  idea 
  of 
  independence 
  of 
  youth 
  to 
  an 
  ex- 
  

   treme 
  degree, 
  but 
  which, 
  instead 
  of 
  rising 
  superior 
  to 
  its 
  parents, 
  

  

  Fig. 
  11. 
  — 
  The 
  head 
  of 
  a 
  tent 
  caterpillar. 
  A, 
  Facial 
  view 
  ; 
  B, 
  under 
  view 
  ; 
  C, 
  side 
  view. 
  

   Ant, 
  antenna 
  • 
  For, 
  opening 
  of 
  back 
  of 
  head 
  into 
  body 
  ; 
  Ft, 
  front 
  ; 
  Hphy, 
  hypopharynx 
  ; 
  

   Lu, 
  labium 
  ; 
  Lm, 
  labrum 
  ; 
  M 
  d, 
  mandible 
  ; 
  Mx, 
  maxilla 
  ; 
  0, 
  eyes 
  ; 
  Spn, 
  spinneret. 
  

  

  has 
  degenerated 
  into 
  the 
  form 
  of 
  a 
  worm. 
  What 
  an 
  excellent 
  theme 
  

   this 
  would 
  furnish 
  to 
  those 
  who 
  at 
  present 
  are 
  so 
  bewailing 
  what 
  

   they 
  believe 
  to 
  be 
  a 
  shocking 
  tendency 
  toward 
  an 
  excess 
  of 
  independ- 
  

   ence 
  on 
  the 
  part 
  of 
  the 
  young 
  of 
  the 
  human 
  species 
  ! 
  But 
  the 
  moral 
  

   aspect 
  of 
  the 
  lesson 
  loses 
  its 
  force 
  when 
  we 
  learn 
  that 
  among 
  insects 
  

   this 
  freedom 
  of 
  the 
  caterpillar 
  from 
  parental 
  restraint 
  gives 
  ad- 
  

   vantages 
  to 
  both 
  young 
  and 
  adults, 
  and, 
  therefore, 
  results 
  in 
  good 
  

   to 
  the 
  species 
  as 
  a 
  whole. 
  Independence 
  entails 
  responsibilities. 
  A 
  

   creature 
  that 
  leaves 
  the 
  beaten 
  paths 
  of 
  its 
  ancestors 
  must 
  learn 
  to 
  

   take 
  care 
  of 
  itself 
  in 
  the 
  new 
  way. 
  And 
  this 
  the 
  caterpillar 
  has 
  

   learned 
  to 
  do 
  preeminently 
  well, 
  as 
  it 
  has 
  come 
  up 
  the 
  long 
  road 
  of 
  

   evolution, 
  till 
  now 
  it 
  possesses 
  both 
  instincts 
  and 
  physical 
  organs 
  that 
  

   make 
  it 
  one 
  of 
  the 
  dominant 
  forms 
  of 
  insect 
  life. 
  

  

  