﻿711 
  

  

  the 
  laboratory. 
  In 
  the 
  field, 
  the 
  cocoons 
  were 
  placed 
  in 
  a 
  water- 
  

   proof 
  box 
  slightly 
  perforated 
  on 
  the 
  side, 
  nailed 
  to 
  the 
  tree, 
  both 
  tree 
  

   and 
  box 
  being 
  smeared 
  with 
  tree-tanglefoot 
  to 
  prevent 
  destruction 
  

   of 
  the 
  cocoons 
  by 
  ants, 
  and 
  there 
  left 
  to 
  emerge. 
  Compsilura 
  concinnata 
  

   should 
  prove 
  of 
  great 
  economic 
  value, 
  as 
  at 
  least 
  sixteen 
  insects 
  native 
  

   to 
  Maine, 
  including 
  the 
  cabbage 
  butterfly 
  and 
  tussock 
  moth, 
  are 
  known 
  

   to 
  serve 
  as 
  its 
  hosts. 
  

  

  CoLTON 
  (W. 
  W.). 
  Report 
  of 
  Superintendent 
  of 
  Gypsy 
  and 
  Brown-tail 
  

   Moth 
  work. 
  — 
  Ann. 
  Rept. 
  Park 
  Commissioners, 
  Fitchburyy 
  Mass., 
  

   1913, 
  pp. 
  25-36, 
  3 
  pis. 
  [Received 
  30th 
  November 
  1914.J 
  

  

  The 
  decrease 
  by 
  one-third 
  in 
  the 
  number 
  of 
  gipsy 
  moth 
  nests 
  found 
  

   during 
  1913 
  is 
  partly 
  due 
  to 
  the 
  spring 
  and 
  summer 
  cleaning 
  of 
  all 
  badly 
  

   infested 
  places, 
  and 
  the 
  removal 
  of 
  old 
  trees 
  and 
  other 
  hiding 
  places. 
  

   Increased 
  spraying 
  and 
  the 
  introduction 
  of 
  parasites 
  are 
  additional 
  

   reasons 
  for 
  the 
  reduction. 
  These 
  measures 
  seem 
  to 
  have 
  produced 
  

   a 
  solution 
  of 
  the 
  gipsy 
  moth 
  problem 
  in 
  the 
  residential 
  sections 
  of 
  

   towns 
  and 
  cities, 
  but 
  the 
  woodland 
  problem 
  is 
  yet 
  to 
  be 
  solved. 
  By 
  

   the 
  removal 
  of 
  trees 
  most 
  suitable 
  for 
  the 
  moths, 
  leaving 
  

   only 
  the 
  most 
  resistant 
  species, 
  much 
  can 
  be 
  done. 
  The 
  following 
  

   list 
  apphes 
  only 
  to 
  forests 
  and 
  not 
  to 
  orchards 
  or 
  shade 
  trees 
  ; 
  in 
  

   both 
  lists 
  preference 
  should 
  be 
  given 
  to 
  the 
  first-named, 
  the 
  later 
  ones 
  

   being 
  interchangeable 
  according 
  to 
  circumstances. 
  To 
  be 
  removed 
  : 
  

   old 
  fruit 
  trees, 
  red 
  and 
  choke 
  cherries, 
  white 
  oaks, 
  thorn 
  apples, 
  grey 
  

   birch, 
  willows, 
  witch 
  hazel, 
  alder, 
  hackberry, 
  shadbush, 
  hornbeam, 
  

   hop 
  hornbeam, 
  black 
  cherry, 
  poplar, 
  elm, 
  mountain 
  maple, 
  and 
  

   striped 
  maple. 
  To 
  be 
  retained 
  : 
  pine, 
  spruce, 
  hemlock, 
  fir, 
  cedar, 
  

   juniper, 
  larch, 
  ash, 
  hickory, 
  basswood, 
  sugar-maple, 
  red 
  maple, 
  black 
  

   and 
  yellow 
  birch, 
  tupelo, 
  sassafras, 
  beech, 
  white 
  birch, 
  black 
  oak, 
  

   chestnut 
  and 
  locust. 
  This 
  does 
  not 
  mean 
  that 
  trees 
  in 
  the 
  second 
  

   Ust 
  will 
  not 
  be 
  attacked 
  at 
  all, 
  as 
  practically 
  all 
  are 
  eaten 
  by 
  the 
  full- 
  

   grown 
  caterpillars. 
  Experiments 
  have 
  proved, 
  however, 
  that 
  the 
  

   young 
  caterpillar 
  may 
  be 
  starved 
  in 
  the 
  absence 
  of 
  the 
  foliage 
  of 
  the 
  

   trees 
  in 
  the 
  first 
  fist. 
  

  

  For 
  combating 
  the 
  brown-tail 
  moth, 
  Euproctis 
  chrysorrhoea, 
  a 
  new 
  

   method 
  was 
  tried. 
  During 
  the 
  winter 
  the 
  nests 
  were 
  removed 
  from 
  

   the 
  trees 
  as 
  usual. 
  This 
  practice 
  will 
  probably 
  have 
  to 
  be 
  resorted 
  

   to 
  for 
  years 
  to 
  come, 
  but 
  for 
  the 
  past 
  two 
  years 
  experiments 
  have 
  been 
  

   conducted 
  with 
  an 
  autumn 
  spraying, 
  and 
  during 
  the 
  summer 
  of 
  1913 
  

   all 
  street 
  and 
  roadside 
  trees 
  were 
  sprayed. 
  By 
  December 
  1913, 
  it 
  

   was 
  clear 
  these 
  operations 
  were 
  successful 
  and 
  would 
  save 
  much 
  

   expense 
  in 
  the 
  following 
  season. 
  

  

  Occurrence 
  of 
  the 
  Colorado 
  Beetle 
  (Leptinotarsa 
  decemlineata) 
  in 
  

   Germany. 
  — 
  Illustrierte 
  landwirtschaftl. 
  Ztng., 
  Berlin^ 
  xxxiv, 
  no. 
  57, 
  

   pp. 
  538-539, 
  1 
  fig. 
  

  

  The 
  Colorado 
  potato 
  beetle, 
  Leptinotarsa 
  decemlineata, 
  which 
  had 
  

   not 
  been 
  seen 
  in 
  Germany 
  since 
  1887, 
  has 
  appeared 
  at 
  Hohenwedel, 
  

   near 
  Stade, 
  a 
  Hanoverian 
  town 
  near 
  the 
  mouth 
  of 
  the 
  Elbe. 
  A 
  potato 
  

   field 
  covering 
  about 
  7 
  J 
  acres 
  was 
  infested, 
  the 
  pest 
  having 
  apparently 
  

   been 
  introduced 
  in 
  some 
  packing 
  material 
  in 
  which 
  a 
  local 
  fruiterer 
  had 
  

  

  