﻿TIMBER; 
  FORESTRY 
  

  

  123 
  

  

  FIG. 
  100. 
  A 
  carnivorous 
  

   beetle 
  (Calosoma 
  syco- 
  

  

  6. 
  Wood-boring 
  and 
  leaf-eating 
  insects 
  should 
  be 
  killed, 
  

   if 
  the 
  expense 
  of 
  the 
  process 
  is 
  not 
  too 
  great. 
  It 
  is 
  suggested, 
  

   for 
  example, 
  that 
  the 
  great 
  damage 
  caused 
  by 
  the 
  spruce- 
  

   destroying 
  beetle, 
  which 
  kills 
  mature 
  trees 
  by 
  mining 
  the 
  bark 
  

   of 
  the 
  trunk, 
  may 
  be 
  much 
  lessened. 
  This 
  can 
  be 
  accomplished 
  

   by 
  cutting 
  and 
  removing 
  most 
  of 
  the 
  infested 
  trees 
  or 
  by 
  gir- 
  

   dling 
  trees 
  early 
  in 
  June, 
  to 
  expose 
  them 
  to 
  the 
  attacks 
  of 
  the 
  

   beetles, 
  then 
  felling 
  and 
  either 
  peeling 
  

   them 
  or 
  immersing 
  them 
  in 
  water, 
  to 
  

   destroy 
  the 
  insects 
  before 
  the 
  new 
  crop 
  

   of 
  beetles 
  emerges 
  from 
  under 
  the 
  bark 
  

   the 
  following 
  June. 
  1 
  

  

  One 
  of 
  the 
  most 
  effectual 
  means 
  of 
  

   destroying 
  some 
  injurious 
  insects 
  con- 
  

   sists 
  in 
  introducing 
  into 
  the 
  region 
  where 
  

   they 
  abound 
  parasitic 
  or 
  other 
  insects 
  

   which 
  will 
  kill 
  great 
  numbers 
  of 
  the 
  

   objectionable 
  species. 
  Plant 
  lice, 
  for 
  in- 
  

   stance, 
  are 
  thus 
  killed 
  by 
  ladybugs. 
  

  

  Vigorous 
  attempts 
  are 
  now 
  being 
  made 
  These 
  bee 
  ti 
  es 
  have 
  been 
  

   to 
  exterminate 
  the 
  gypsy 
  moth 
  in 
  New 
  imported 
  from 
  Europe, 
  

  

  ,, 
  ., 
  -, 
  , 
  and 
  successful 
  colonies 
  of 
  

  

  England 
  by 
  means 
  of 
  parasites 
  and 
  by 
  them 
  established 
  in 
  New 
  

   carnivorous 
  insects 
  (fig. 
  100) 
  which 
  at- 
  

   tack 
  and 
  kill 
  the 
  moth 
  at 
  some 
  stage 
  of 
  

   its 
  existence. 
  The 
  caterpillars 
  of 
  this 
  

   moth 
  are 
  extremely 
  destructive 
  to 
  many 
  kinds 
  of 
  trees, 
  which 
  

   they 
  strip 
  of 
  their 
  leaves 
  in 
  a 
  short 
  time. 
  More 
  than 
  a 
  million 
  

   dollars 
  has 
  probably 
  been 
  expended 
  in 
  Massachusetts 
  alone 
  in 
  

   trying 
  to 
  get 
  rid 
  of 
  this 
  pest. 
  The 
  moth 
  was 
  introduced 
  into 
  

   America 
  in 
  1869, 
  by 
  a 
  scientist 
  who 
  lived 
  at 
  Medford, 
  near 
  

   Boston, 
  in 
  the 
  course 
  of 
  some 
  most 
  unfortunate 
  experiments 
  

   on 
  silk-producing 
  insects. 
  2 
  

  

  1 
  See 
  "Insect 
  Enemies 
  of 
  the 
  Spruce 
  in 
  the 
  Northeast," 
  Bulletin 
  28, 
  

   New 
  Series, 
  Division 
  of 
  Entomology, 
  U.S. 
  Dept. 
  Agr., 
  1001. 
  

  

  2 
  "The 
  Gypsy 
  Moth 
  in 
  America," 
  Bulletin 
  11, 
  New 
  Series, 
  Division 
  of 
  

   Entomology, 
  'U.S. 
  Dept. 
  Agr., 
  1897. 
  

  

  gypsy 
  moth 
  

  

  England. 
  After 
  United 
  

  

  States 
  Department 
  of 
  

  

  Agriculture 
  

  

  