﻿42 
  

  

  THE 
  DISPEESION 
  OF 
  THE 
  GIPSY 
  MOTH. 
  

  

  that 
  infertile 
  egg 
  clusters 
  will 
  result 
  in 
  case 
  any 
  are 
  deposited. 
  Cases 
  

   are 
  on 
  record 
  w 
  T 
  here 
  a 
  male 
  gipsy 
  moth 
  has 
  been 
  attracted 
  half 
  a 
  mile 
  

   by 
  a 
  female. 
  This 
  factor 
  probably 
  assists 
  the 
  species 
  in 
  becoming 
  

   established 
  at 
  distant 
  points. 
  

  

  RELATION 
  OF 
  SCOUTING 
  RECORDS 
  TO 
  WIND 
  DISPERSION. 
  

  

  The 
  records 
  which 
  have 
  accumulated 
  showing 
  the 
  number 
  of 
  egg 
  

   clusters 
  found 
  and 
  treated 
  by 
  scouts 
  in 
  the 
  various 
  towns, 
  as 
  well 
  as 
  

   the 
  reports 
  of 
  the 
  work 
  done 
  by 
  local 
  superintendents, 
  have 
  been 
  

   examined 
  for 
  the 
  purpose 
  of 
  determining 
  whether 
  information 
  could 
  

   be 
  secured 
  that 
  would 
  have 
  any 
  bearing 
  on 
  the 
  dispersion 
  of 
  the 
  

   insect. 
  As 
  a 
  result 
  of 
  the 
  examinations 
  it 
  appears 
  impossible 
  to 
  give 
  

   data 
  covering 
  the 
  entire 
  territory, 
  since 
  the 
  records 
  are 
  incomplete 
  

   in 
  many 
  cases 
  and 
  they 
  have 
  been 
  kept 
  in 
  various 
  ways 
  so 
  as 
  to 
  make 
  

   a 
  comparison 
  of 
  little 
  value. 
  The 
  plan 
  has 
  been 
  to 
  select 
  several 
  

   towns 
  and 
  cities 
  (see 
  fig. 
  4) 
  where 
  complete 
  records 
  were 
  obtained. 
  

   The 
  geographical 
  locations 
  of 
  these 
  are 
  typical, 
  so 
  that 
  the 
  results 
  

   will 
  serve 
  to 
  illustrate 
  the 
  relation 
  of 
  wind 
  to 
  infestation 
  as 
  found 
  

   by 
  scouts. 
  It 
  should 
  be 
  remembered 
  that 
  no 
  woodland 
  area 
  is 
  in- 
  

   cluded 
  in 
  the 
  records 
  cited, 
  for 
  only 
  roadsides, 
  orchards, 
  and 
  the 
  

   grounds 
  about 
  residences 
  were 
  examined. 
  

  

  In 
  order 
  to 
  check 
  this 
  data 
  a 
  complete 
  scout 
  has 
  been 
  made 
  of 
  

   several 
  towns 
  by 
  employees 
  of 
  the 
  Bureau 
  of 
  Entomology, 
  United 
  

   States 
  Department 
  of 
  Agriculture, 
  working 
  under 
  the 
  direction 
  of 
  

   Mr. 
  Rogers. 
  This 
  included 
  a 
  careful 
  examination 
  of 
  the 
  wooded 
  

   areas 
  as 
  well 
  as 
  the 
  roadside 
  trees. 
  

  

  RECORDS 
  OF 
  DISPERSION 
  OF 
  THE 
  GIPSY 
  MOTH 
  SECURED 
  FROM 
  

   REPORTS 
  OF 
  SCOUTING 
  IN 
  SEVERAL 
  SELECTED 
  CITIES. 
  

  

  For 
  the 
  purpose 
  of 
  making 
  a 
  comparison 
  showing 
  the 
  rapidity 
  of 
  

   infestation 
  in 
  different 
  localities 
  (fig. 
  4) 
  the 
  cities 
  of 
  Brockton 
  and 
  

   Worcester, 
  Mass., 
  and 
  Nashua, 
  Manchester, 
  Concord, 
  and 
  Portsmouth, 
  

   N. 
  H., 
  are 
  given 
  in 
  Table 
  VI. 
  

  

  Table 
  VI.- 
  

  

  ■Record 
  of 
  egg 
  clusters 
  of 
  the 
  gipsy 
  moth 
  found 
  in 
  certain 
  cities 
  of 
  

   Neiv 
  England 
  during 
  the 
  years 
  1905-11. 
  

  

  Cities. 
  

  

  1905-6 
  

  

  1906-7 
  

  

  1907-8 
  

  

  1908-9 
  

  

  1909-10 
  

  

  1910-11 
  

  

  Massachusetts: 
  

  

  Brockton 
  

  

  24 
  

   

  

  

   

   

   2 
  

  

  127 
  

   

  

  9 
  

  

  2 
  

  

  

  

  175 
  

  

  283 
  

  

  44 
  

  

  176 
  

   53 
  

   ( 
  3 
  ) 
  

   802 
  

  

  3,101 
  

   32 
  

  

  910 
  

  

  456 
  

  

  93 
  

  

  9,417 
  

  

  1,575 
  

   31 
  

  

  16, 
  759 
  

  

  ( 
  2 
  ) 
  

  

  1,855 
  

   72,294 
  

  

  5,600 
  

  

  Worcester 
  

  

  275 
  

  

  New 
  Hampshire: 
  

  

  Nashua 
  

  

  1 
  17, 
  607 
  

  

  Manchester 
  

  

  i 
  16, 
  598 
  

  

  Concord 
  

  

  4,419 
  

  

  Portsmouth 
  

  

  i 
  72, 
  000 
  

  

  

  

  1 
  Estimated. 
  

  

  2 
  No 
  record. 
  

  

  1 
  pupa. 
  

  

  