﻿PHOCEEDINGS 
  OF 
  THE 
  FOURTH 
  ENTOMOLOGICAL 
  MJSETINQ 
  183 
  

  

  this 
  class 
  will 
  be 
  obtained 
  by 
  raodificationa 
  of 
  the 
  felling 
  and 
  seasoning 
  

   rules. 
  

  

  (6) 
  Teak 
  Borers. 
  These 
  include 
  Duomitus 
  ceramicus, 
  Haplohammus 
  

   cervimis, 
  Phassus 
  malaharicus, 
  etc. 
  The 
  most 
  important, 
  the 
  notorious 
  

   bee-hole 
  borer 
  of 
  teak, 
  has 
  been 
  studied 
  entirely 
  in 
  the 
  field 
  in 
  Burma. 
  

   No 
  living 
  insect 
  has 
  been 
  studied 
  in 
  the 
  Institute 
  insectary, 
  as 
  the 
  borer 
  

   is 
  a 
  pest 
  of 
  living 
  trees 
  and 
  is 
  confined 
  to 
  the 
  teak 
  forests 
  of 
  Burma. 
  An 
  

   account 
  of 
  the 
  investigation 
  is 
  about 
  to 
  appear 
  as 
  a 
  Forest 
  Kecord 
  and 
  

   is 
  therefore 
  not 
  recorded 
  here 
  in 
  detail. 
  It 
  has 
  been 
  found 
  that 
  the 
  

   incidence 
  of 
  beeholes 
  in 
  plantation 
  teak 
  is 
  proportional 
  to 
  the 
  girth 
  in 
  

   even-aged 
  stands, 
  i.e.y 
  that 
  the 
  development 
  of 
  the 
  borer 
  is 
  most 
  success- 
  

   ful 
  in 
  the 
  most 
  vigorous 
  trees. 
  Annual 
  Incidence 
  Graphs 
  have 
  also 
  

   been 
  obtained 
  showing 
  that 
  periodic 
  fluctuations 
  occur 
  locally, 
  while 
  

   the 
  mean 
  annual 
  incidence 
  increases 
  relatively 
  slowly. 
  Fluctuations 
  

   require 
  correlation 
  with 
  such 
  factors 
  as 
  fire-protection 
  and 
  extraction. 
  

   The 
  effect 
  of 
  fire 
  on 
  the 
  incidence 
  of 
  the 
  borer 
  can 
  be 
  considered 
  on 
  theo- 
  

   retical 
  grounds 
  based 
  on 
  its 
  observed 
  effect 
  on 
  teak 
  regeneration 
  and 
  

   the 
  evergreen 
  undergrowth 
  of 
  high 
  forest; 
  it 
  is 
  possible 
  to 
  explain 
  the 
  

   apparent 
  anomaly 
  of 
  badly 
  beeholed 
  teak 
  in 
  forests 
  now 
  traversed 
  by 
  

   fire 
  and 
  in 
  forests 
  that 
  have 
  been 
  fire-protected 
  for 
  long 
  periods. 
  

  

  The 
  inquiry 
  has 
  advanced 
  beyond 
  the 
  entomological 
  stage 
  and 
  has 
  

   necessitated 
  the 
  employment 
  of 
  a 
  whole-time 
  officer 
  for 
  the 
  collection 
  

   of 
  statistical 
  data 
  before 
  further 
  research 
  can 
  be 
  carried 
  on. 
  

  

  n:^ 
  

  

  