﻿24 
  Thirtieth 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  far 
  to 
  the 
  north 
  of 
  this 
  road. 
  Again, 
  on 
  the 
  trail 
  from 
  Adiron- 
  

   dack 
  to 
  Calamity 
  Pond, 
  there 
  was 
  sad 
  evidence 
  that 
  the 
  little 
  

   destroyer 
  had 
  invaded 
  also 
  the 
  forests 
  of 
  Essex 
  comity. 
  From 
  

   what 
  I 
  have 
  seen 
  at 
  Lake 
  Pleasant, 
  in 
  the 
  sonthern 
  part, 
  and 
  

   in 
  the 
  vicinity 
  of 
  Long 
  Lake, 
  in 
  the 
  northern 
  part, 
  and 
  from 
  

   information 
  concerning 
  the 
  Cedar 
  river 
  region, 
  in 
  the 
  central 
  

   part 
  of 
  Hamilton 
  county, 
  there 
  is 
  reason 
  to 
  believe 
  that 
  much 
  

   of 
  the 
  spruce 
  timber 
  of 
  this 
  county 
  has 
  already 
  been 
  invaded 
  

   by 
  the 
  beetle. 
  How 
  much 
  farther 
  this 
  destructive 
  work 
  has 
  

   extended, 
  or 
  will 
  extend, 
  it 
  is 
  impossible 
  to 
  say. 
  But 
  one 
  

   thing 
  is 
  certain, 
  it 
  is 
  still 
  in 
  progress. 
  

  

  For 
  the 
  purpose 
  of 
  gaining 
  more 
  knowledge 
  of 
  the 
  insect, 
  I 
  

   cut 
  down, 
  at 
  South 
  Pond, 
  a 
  tree 
  that 
  had 
  recently 
  been 
  attacked 
  

   by 
  it. 
  It 
  was 
  about 
  twenty 
  inches 
  in 
  diameter 
  at 
  the 
  base 
  ; 
  the 
  

   foliage 
  was 
  still 
  fresh 
  and 
  green, 
  and 
  there 
  was 
  nothing, 
  except 
  

   the 
  perforations 
  in 
  the 
  bark, 
  to 
  indicate 
  that 
  it 
  was 
  at 
  all 
  affected. 
  

   The 
  bark 
  peeled 
  from 
  the 
  trunk 
  without 
  much 
  difficulty, 
  the 
  

   sap 
  wood 
  was 
  perfectly 
  sound, 
  and 
  the 
  heart 
  wood 
  also, 
  except 
  

   a 
  small 
  portion 
  in 
  which 
  there 
  was 
  a 
  slight 
  appearance 
  of 
  inci- 
  

   pient 
  decay. 
  Longitudinal 
  furrows, 
  varying 
  from 
  one 
  to 
  six 
  

   inches 
  in 
  length, 
  were 
  found 
  under 
  the 
  bark, 
  and 
  each 
  furrow 
  

   was 
  occupied 
  by 
  one 
  or 
  two 
  beetles. 
  The 
  furrows 
  are 
  excavated 
  

   from 
  below 
  upwards. 
  In 
  the 
  short 
  ones 
  but 
  one 
  beetle 
  was 
  

   found, 
  and 
  but 
  one 
  perforation 
  communicating 
  with 
  the 
  external 
  

   air. 
  In 
  the 
  longer 
  ones 
  two 
  beetles 
  (probably 
  the 
  two 
  sexes), 
  

   were 
  usually 
  found, 
  and 
  from 
  two 
  to 
  four 
  perforations 
  afforded 
  

   means 
  of 
  ingress 
  and 
  egress. 
  The 
  lowest 
  perforation, 
  which 
  is 
  

   the 
  one 
  by 
  which 
  the 
  beetle 
  first 
  enters 
  and 
  commences 
  its 
  fur- 
  

   row, 
  is 
  often 
  found 
  closed 
  or 
  " 
  blocked 
  up" 
  by 
  the 
  dust 
  and 
  

   debris 
  thrown 
  down 
  by 
  the 
  excavator 
  in 
  the 
  progress 
  of 
  the 
  

   work. 
  The 
  second 
  perforation 
  is 
  generally 
  one 
  or 
  two 
  inches 
  

   above 
  the 
  first. 
  I 
  failed 
  to 
  discover 
  whether 
  it 
  is 
  made 
  by 
  

   the 
  second 
  beetle 
  for 
  the 
  purpose 
  of 
  ingress 
  or 
  by 
  the 
  first 
  

   beetle. 
  The 
  third 
  and 
  fourth 
  perforations 
  are 
  in 
  a 
  nearly 
  direct 
  

   line 
  above 
  the 
  other 
  two 
  and 
  are 
  probably 
  made 
  from 
  within 
  

   outwardly, 
  but 
  for 
  what 
  purpose 
  is 
  uncertain. 
  In 
  one 
  instance 
  

   the 
  two 
  beetles 
  were 
  found 
  at 
  work 
  making 
  these 
  perforations, 
  

   boring 
  through 
  from 
  the 
  inner 
  surface 
  of 
  the 
  bark. 
  In 
  one 
  

   instance 
  the 
  third 
  was 
  less 
  than 
  half 
  an 
  inch 
  above 
  the 
  second, 
  

   so 
  that 
  there 
  would 
  seem 
  to 
  be 
  no 
  particular 
  necessity 
  for 
  it. 
  

  

  