﻿186 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  get 
  filled 
  up 
  with 
  the 
  dead 
  bodies 
  of 
  the 
  moths 
  or 
  with 
  leaves, 
  or 
  get 
  

   bridged 
  with 
  spider-web; 
  and 
  where 
  fastened 
  directly 
  around 
  the 
  tree 
  

   must 
  needs 
  be 
  renewed 
  as 
  the 
  girth 
  of 
  the 
  tree 
  increases. 
  

  

  Fig. 
  4 
  represents 
  the 
  contrivance, 
  ^^ 
  which 
  consists 
  essentially 
  of 
  a 
  

   band 
  or 
  circle 
  of 
  tin, 
  a 
  few 
  inches 
  outside 
  the 
  trunk 
  of 
  the 
  tree, 
  and 
  held 
  

   there 
  by 
  a 
  circle 
  of 
  muslin, 
  attached 
  to 
  the 
  tin 
  at 
  its 
  edge 
  and 
  drawn 
  

   with 
  a 
  cord 
  at 
  the 
  top, 
  so 
  as 
  to 
  tit 
  the 
  tree 
  closely 
  and 
  prevent 
  the 
  in- 
  

   sects 
  from 
  getting 
  up 
  without 
  going 
  over 
  the 
  tin, 
  covered 
  with 
  a 
  mixture 
  

  

  of 
  castor- 
  oil 
  and 
  kerosene 
  ; 
  as 
  soon 
  as 
  they 
  

   touch 
  this, 
  they 
  drop 
  to 
  the 
  ground. 
  Fig. 
  5 
  .is 
  

   a 
  section 
  of 
  the 
  contrivance, 
  and 
  Fig. 
  6 
  a 
  sec- 
  

   tion 
  of 
  the 
  union 
  of 
  the 
  tin 
  and 
  muslin, 
  effected 
  

   by 
  turning 
  over 
  the 
  upper 
  

   edge 
  of 
  the 
  tin 
  before 
  it 
  is 
  

   bent 
  to 
  a 
  circle, 
  inserting 
  

   the 
  edge 
  of 
  the 
  muslin, 
  

   and 
  hammering 
  them 
  to- 
  

   gether. 
  The 
  tin 
  may 
  be 
  

   about 
  three 
  inches 
  wide, 
  

   and 
  long 
  enough 
  to 
  rest 
  

   three 
  or 
  four 
  inches 
  off 
  

   from 
  the 
  trunk, 
  when 
  bent 
  

   around 
  in 
  the 
  form 
  of 
  a 
  hoop, 
  and 
  secured 
  by 
  rivets 
  or 
  small 
  tacks. 
  

   After 
  the 
  tin 
  and 
  muslin 
  are 
  attached 
  to 
  the 
  tree, 
  the 
  whole 
  inner 
  or 
  

   lower 
  surface 
  of 
  the 
  tin 
  is 
  daubed 
  with 
  a 
  mixture 
  of 
  equal 
  parts 
  of 
  kero- 
  

   sene 
  and 
  castor-oil. 
  The 
  tin 
  and 
  muslin 
  entirely 
  protect 
  the 
  oil 
  from 
  the 
  

   sun 
  and 
  the 
  weather, 
  and 
  it 
  will 
  not 
  dry 
  for 
  several 
  days. 
  It 
  will 
  not 
  

   run 
  down, 
  as 
  the 
  castor-oil 
  thickens 
  it. 
  Of 
  course 
  it 
  needs 
  occasional 
  

   renewal, 
  with 
  a 
  small 
  brush 
  or 
  feather. 
  This 
  protector 
  is 
  kept 
  on 
  the 
  

   tree 
  till 
  the 
  moths 
  disappear.'^ 
  

  

  Fig. 
  4. 
  — 
  Canlier-worm 
  trap. 
  

  

  MUSLIN. 
  

  

  TIN. 
  

  

  Tig. 
  5.— 
  Section 
  of 
  canker- 
  

   worm 
  trap. 
  

  

  TROUaHS 
  OF 
  OIL. 
  

  

  Another 
  remedy, 
  calculated 
  to 
  prevent 
  the 
  moth, 
  and 
  the 
  larva 
  as 
  

   well, 
  from 
  ascending 
  the 
  tree, 
  is 
  the 
  use 
  of 
  a 
  trough 
  to 
  contain 
  some 
  

   substance, 
  usually 
  of 
  an 
  oily 
  nature, 
  which 
  kills 
  the 
  insects 
  as 
  they 
  

   come 
  in 
  contact 
  with 
  it. 
  These 
  troughs 
  are 
  made 
  of 
  tin, 
  lead, 
  

   rubber, 
  iron, 
  or 
  other 
  substances.^ 
  The 
  principal 
  objections 
  to 
  

   their 
  use 
  are 
  their 
  cost, 
  the 
  difficulty 
  of 
  fixing 
  and 
  keeping 
  them 
  

   in 
  their 
  places, 
  and 
  the 
  injury 
  suffered 
  by 
  the 
  trees 
  when 
  their 
  

   contents 
  are 
  washed 
  or 
  blown 
  out 
  and 
  fall 
  on 
  the 
  bark. 
  They 
  

   ought 
  not 
  to 
  be 
  nailed, 
  as 
  the 
  nails 
  are 
  found 
  to 
  be 
  -injurious 
  

   to 
  the 
  trees, 
  but 
  should 
  be 
  supported 
  by 
  a 
  few 
  wooden 
  wedges, 
  

   driven 
  between 
  them 
  and 
  the 
  trunks. 
  A 
  stuffing 
  of 
  sea-weed 
  

   or 
  fine 
  hay, 
  which 
  will 
  not 
  absorb 
  oil, 
  is 
  much 
  better 
  than 
  one 
  

   of 
  cloth, 
  cotton, 
  or 
  tow. 
  Before 
  the 
  troughs 
  are 
  fastened 
  and 
  

   filled, 
  the 
  body 
  of 
  the 
  tree 
  should 
  be 
  well 
  coated 
  with 
  clay 
  -paint 
  or 
  white- 
  

  

  