﻿ILLUSTRATIONS 
  

  

  PLATES. 
  

  

  Page. 
  

   Plate 
  I. 
  Gipsy 
  -moth 
  egg 
  clusters' 
  on 
  charred 
  wood 
  on 
  the 
  edge 
  of 
  a 
  stream, 
  

  

  Saugus, 
  Mass., 
  May, 
  1912 
  8 
  

  

  II. 
  Female 
  gipsy 
  moths 
  depositing 
  eggs 
  on 
  oak 
  foliage, 
  Melrose, 
  Mass.. 
  8 
  

  

  III. 
  Lumber 
  piles 
  at 
  York, 
  Me. 
  ; 
  gipsy-moth 
  egg 
  clusters 
  on 
  upturned 
  board 
  

  

  at 
  right 
  of 
  foreground 
  8 
  

  

  IV. 
  Crow's 
  nest 
  in 
  top 
  of 
  pine 
  tree 
  16 
  

  

  V. 
  Gipsy-moth 
  caterpillar, 
  showing 
  aerostatic 
  hairs. 
  Fig. 
  1. 
  — 
  First- 
  

   stage 
  larva. 
  Fig. 
  2. 
  — 
  Tubercule 
  from 
  first-stage 
  larva, 
  showing 
  

   hairs 
  16 
  

  

  VI. 
  Trap 
  moored 
  in 
  pond 
  to 
  test 
  aviation 
  of 
  gipsy-moth 
  larvae 
  16 
  

  

  VII. 
  Trap 
  built 
  on 
  top 
  of 
  observation 
  tower 
  to 
  test 
  aviation 
  of 
  gipsy-moth 
  

  

  larvae 
  20 
  

  

  VIII. 
  Screens 
  treated 
  with 
  tanglefoot 
  attached 
  to 
  water 
  tower 
  to 
  test 
  avia- 
  

   tion 
  of 
  gipsy-moth 
  larvae 
  20 
  

  

  IX. 
  View 
  of 
  salt 
  marshes 
  near 
  Lynn, 
  Mass., 
  where 
  experiments 
  on 
  aviation 
  

  

  of 
  caterpillars 
  were 
  conducted; 
  post 
  and 
  box 
  used 
  in 
  experiments. 
  20 
  

  

  X. 
  Portable 
  screens 
  used 
  for 
  caterpillar-aviation 
  experiments 
  20 
  

  

  XI. 
  Fig. 
  1. 
  — 
  Female 
  gipsy 
  moths 
  depositing 
  egg 
  clusters 
  on 
  white-oak 
  

  

  tree 
  near 
  the 
  ground. 
  Fig. 
  2. 
  — 
  Egg 
  clusters 
  on 
  stone 
  wall 
  28 
  

  

  XII. 
  Oak 
  tree 
  showing 
  gipsy-moth 
  caterpillars 
  spinning 
  to 
  the 
  ground 
  28 
  

  

  XIII. 
  Solid 
  white-pine 
  block 
  near 
  Nashua, 
  N. 
  H 
  28 
  

  

  XIV. 
  Row 
  of 
  large 
  maple 
  nursery 
  stock 
  infested 
  by 
  the 
  gipsy 
  moth 
  40 
  

  

  XV. 
  Gipsy-moth 
  egg 
  cluster 
  on 
  small 
  Norway 
  spruce 
  tree 
  in 
  nursery 
  row. 
  40 
  

  

  XVI. 
  Weeping 
  mulberry 
  showing 
  bird's 
  nest 
  and 
  near 
  by 
  two 
  gipsy-moth 
  

  

  egg 
  clusters 
  40 
  

  

  TEXT 
  FIGURES. 
  

  

  Fig. 
  1. 
  Diagram 
  showing 
  maximum 
  and 
  minimum 
  temperature 
  before 
  and 
  

  

  after 
  hatching 
  of 
  eggs 
  of 
  the 
  gipsy 
  moth, 
  1908-1911 
  26 
  

  

  2. 
  Female 
  pupal 
  case 
  and 
  egg 
  clusters 
  of 
  gipsy 
  moth 
  on 
  stone 
  foundation 
  

  

  under 
  woodwork 
  of 
  house 
  29 
  

  

  3. 
  Diagram 
  showing 
  the 
  proportion 
  of 
  time 
  the 
  wind 
  blew 
  in 
  each 
  direction, 
  

  

  when 
  wind 
  spread 
  was 
  possible, 
  during 
  April 
  and 
  May, 
  1902-1911. 
  . 
  36 
  

  

  4. 
  Map 
  showing 
  location 
  of 
  towns 
  and 
  cities 
  in 
  New 
  Hampshire 
  and 
  Massa- 
  

  

  chusetts 
  where 
  scouting 
  records 
  have 
  been 
  consulted 
  to 
  compare 
  the 
  

   relation 
  of 
  infestation 
  to 
  wind 
  spread 
  44 
  

  

  5. 
  Map 
  of 
  town 
  of 
  Boylston, 
  Mass., 
  showing 
  increase 
  in 
  gipsy-moth-infested 
  

  

  localities, 
  1909-10 
  and 
  1910-11 
  47 
  

  

  6. 
  Map 
  showing 
  towns 
  and 
  cities 
  in 
  New 
  England 
  where 
  woodland 
  scout- 
  

  

  ing 
  was 
  done, 
  1911-12 
  52 
  

  

  MAP. 
  

  

  Map 
  1. 
  Showing 
  dispersion 
  and 
  present 
  distribution 
  of 
  the 
  gipsy 
  moth 
  in 
  New 
  

  

  England 
  40 
  

  

  6 
  

  

  