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  ANNUAL 
  REPORT 
  SMITHSONIAN 
  INSTITUTION, 
  1922. 
  

  

  It 
  is 
  surprising 
  that 
  these 
  infant 
  caterpillars 
  can 
  remain 
  inactive 
  

   like 
  this 
  all 
  through 
  the 
  summer, 
  when 
  the 
  warmth 
  spurs 
  the 
  vitality 
  

   of 
  other 
  species 
  and 
  speeds 
  them 
  up 
  to 
  their 
  most 
  rapid 
  growth 
  and 
  

   development. 
  External 
  conditions 
  in 
  general 
  appear 
  to 
  have 
  much 
  

   to 
  do 
  with 
  regulating 
  the 
  lives 
  of 
  insects, 
  but 
  the 
  tent 
  caterpillars 
  in 
  

   Their 
  eggs 
  give 
  proof 
  that 
  the 
  creature 
  is 
  not 
  entirely 
  the 
  slave 
  of 
  

   environment. 
  By 
  some 
  secret 
  source 
  of 
  patience 
  the 
  prisoners 
  will 
  

   serve 
  their 
  time 
  in 
  those 
  tiny 
  capsules 
  through 
  all 
  the 
  heat 
  of 
  sum- 
  

   mer, 
  the 
  cold 
  of 
  winter, 
  and 
  not 
  till 
  the 
  cherry 
  buds 
  are 
  ready 
  to 
  

   open 
  in 
  the 
  spring 
  will 
  they 
  gnaw 
  through 
  the 
  inclosing 
  shells 
  against 
  

   which 
  their 
  faces 
  have 
  been 
  pressing 
  all 
  this 
  while. 
  

  

  