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  PROCEEDINGS 
  OF 
  THE 
  FOIJETH 
  ENTOMOLOGICAL 
  MEETING 
  

  

  very 
  densely. 
  No 
  other 
  part 
  of 
  the 
  dorsal 
  or 
  ventral 
  surface 
  except 
  

   the 
  hind 
  end 
  has 
  such 
  hairs. 
  The 
  hind 
  end 
  has 
  a 
  transverse 
  slit 
  ; 
  its 
  

   dorsal 
  margins 
  are 
  clothed 
  in 
  longish 
  brown 
  hairs 
  and 
  its 
  ventral 
  surface 
  

   has 
  short 
  bristle-like 
  hairs 
  arranged 
  over 
  a 
  space 
  triangular 
  in 
  shape 
  

   with 
  the 
  vertex 
  of 
  the 
  triangle 
  turned 
  anteriorly. 
  There 
  are 
  a 
  few 
  

   long 
  hairs 
  scattered 
  on 
  head 
  and 
  body. 
  The 
  spiracles 
  are 
  brown-yellow 
  

   and 
  crescent 
  shaped 
  ; 
  the 
  concave 
  side 
  of 
  the 
  prothoracic 
  spiracles 
  is 
  

   turned 
  posteriorly 
  and 
  that 
  of 
  all 
  abdominal 
  ones 
  anteriorly. 
  The 
  

   general 
  colour 
  of 
  the 
  body 
  is 
  pale 
  yellowish 
  white, 
  that 
  of 
  the 
  hinder 
  

   part 
  being 
  dark. 
  The 
  legs 
  are 
  brownish 
  and 
  each 
  of 
  them 
  has 
  a 
  distinct 
  

   claw. 
  

  

  Alissonotum 
  piceum. 
  

  

  This 
  most 
  probably 
  has 
  a 
  lifehistory 
  similar 
  to 
  that 
  of 
  Alissonotum 
  

   impressicolle. 
  A 
  few 
  beetles 
  collected 
  in 
  May 
  rested 
  in 
  the 
  Insectary 
  

   in 
  the 
  adult 
  stage, 
  one 
  living 
  until 
  October, 
  but 
  no 
  eggs 
  were 
  obtained. 
  

  

  Alissonotum 
  simile. 
  

  

  This 
  has 
  probably 
  a 
  lifehistory 
  similar 
  to 
  that 
  of 
  A. 
  piceum. 
  A 
  

   larva 
  collected 
  from 
  sugarcane 
  fields 
  at 
  Kamrup 
  on 
  20th 
  May 
  

   developed 
  into 
  a 
  beetle 
  on 
  16th 
  June. 
  

  

  Xyleborus 
  perforans, 
  Woll. 
  

  

  Foodplants 
  — 
  Sugarcane. 
  

  

  Sal 
  {SJiorea 
  robusta). 
  

   Anogeissus 
  latifolia. 
  

   Areca 
  catechu. 
  

  

  " 
  In 
  the 
  course 
  of 
  the 
  last 
  four 
  years 
  during 
  which 
  especial 
  atten- 
  

   tion 
  has 
  been 
  paid 
  to 
  the 
  insect 
  pests 
  of 
  sugarcane, 
  the 
  Scolytid 
  borer, 
  

   Xyleborus 
  perforans, 
  Woll. 
  (Plate 
  IV), 
  has 
  only 
  been 
  observed 
  once, 
  

   in 
  December 
  1919, 
  in 
  a 
  variety 
  of 
  cane 
  called 
  B. 
  147, 
  which 
  was 
  growing 
  

   on 
  the 
  Chinsurah 
  Farm. 
  This 
  beetle 
  came 
  into 
  prominence 
  over 
  thirty 
  

   years 
  ago 
  in 
  connection 
  with 
  the 
  destruction 
  of 
  beer-casks 
  shipped 
  

   into 
  India 
  and 
  was 
  investigated 
  by 
  W. 
  F. 
  H. 
  Blanford, 
  who 
  considered 
  

   X. 
  affinis, 
  attacking 
  sugarcane 
  in 
  the 
  West 
  Indies, 
  as 
  a 
  variety 
  of 
  X 
  

   jjerforans. 
  In 
  1900 
  a 
  Xyleborus 
  was 
  reported 
  as 
  boring 
  sugarcane 
  in 
  

   Bengal 
  and 
  was 
  considered 
  to 
  be 
  either 
  identical 
  with, 
  or 
  closely 
  allied 
  

   to, 
  X. 
  perforans. 
  In 
  1892 
  this 
  beetle 
  formed 
  the 
  subject-matter 
  of 
  a 
  

   warning 
  letter 
  issued 
  by 
  the 
  Revenue 
  and 
  Agriculture 
  Department 
  

   of 
  the 
  Government 
  of 
  India, 
  which 
  stated 
  that 
  this 
  pest, 
  notorious 
  in 
  

   the 
  West 
  Indies 
  as 
  a 
  pest 
  of 
  sugarcane, 
  had 
  already 
  been 
  introduced 
  

  

  