﻿106 
  

  

  PEOCEEDINGS 
  OF 
  THE 
  FOURTH 
  ENTOMOLOGICAL 
  MEETING 
  

  

  of 
  them, 
  and 
  should 
  be 
  considered 
  as 
  supplementary 
  to 
  the 
  latter 
  

   publication. 
  

  

  The 
  EXTERNAL 
  Agents 
  of 
  damage. 
  

   The 
  external 
  agents 
  of 
  damage 
  should 
  be 
  grouped 
  as 
  follows 
  : 
  — 
  

  

  (1) 
  Termites, 
  commonly 
  knowTi 
  as 
  " 
  White 
  ants." 
  

  

  (2) 
  Mole 
  Crickets. 
  

  

  (3) 
  Beetle 
  grubs. 
  

  

  (4) 
  Beetles. 
  

  

  (5) 
  Ked 
  Ants 
  (Dorylus). 
  

  

  There 
  is 
  hardly 
  anything 
  of 
  importance 
  to 
  add 
  with 
  regard 
  to 
  

   Mole 
  Crickets 
  and 
  Red 
  Ants 
  {Dorylus). 
  

  

  Termites. 
  

   With 
  regard 
  to 
  termites, 
  another 
  year's 
  cultivation 
  of 
  cane 
  in 
  the 
  

   area 
  in 
  the 
  Brickfield 
  between 
  the 
  treated 
  and 
  untreated 
  plots 
  experi- 
  

   mented 
  upon 
  in 
  1918 
  (see 
  Plate 
  69 
  of 
  First 
  Paper) 
  exhibited 
  similar 
  

   difierences 
  in 
  the 
  degree 
  of 
  infestation 
  as 
  recorded 
  in 
  the 
  first 
  paper. 
  

   For 
  the 
  purpose 
  of 
  ascertaining 
  as 
  clearly 
  as 
  possible 
  the 
  damage 
  by 
  

   termites 
  this 
  plot 
  was 
  divided 
  into 
  five 
  smaller 
  plots. 
  Analyses 
  of 
  the 
  

   soils 
  of 
  the 
  first 
  of 
  these 
  small 
  plots 
  (counting 
  from 
  the 
  east), 
  which 
  

   showed 
  the 
  least 
  and 
  of 
  the 
  fifth 
  plot, 
  which 
  showed 
  the 
  greatest 
  

   damage, 
  exhibited 
  slight 
  differences 
  in 
  the 
  constituents 
  of 
  the 
  soils 
  

   as 
  given 
  below. 
  No 
  experiments 
  on 
  the 
  basis 
  of 
  these 
  differences 
  have 
  

   yet 
  been 
  made. 
  

  

  