﻿568 
  

  

  exception 
  of 
  areca 
  nut, 
  Crystostachys, 
  Nyophorbe, 
  Caryota 
  urens, 
  

   Chrysalidocarpus 
  and 
  various 
  species 
  of 
  Atenga. 
  The 
  coco-de-mer 
  is 
  

   fortunately 
  seldom 
  attacked. 
  Luvistonas, 
  Verschaffeltia, 
  Oreodoxa 
  and 
  

   Deckenia 
  are 
  the 
  favourite 
  food-plants. 
  Another 
  coconut 
  beetle 
  

   (Melitomma 
  insulare) 
  is 
  very 
  common 
  and 
  does 
  much 
  damage, 
  but 
  

   is 
  kept 
  under 
  better 
  control 
  than 
  formerly 
  by 
  the 
  destruction 
  of 
  the 
  

   fallen 
  trees 
  and 
  by 
  removing 
  the 
  larvae 
  from 
  standing 
  ones, 
  although 
  

   this 
  involves 
  a 
  considerable 
  amount 
  of 
  labour. 
  They 
  are 
  difficult 
  to 
  

   trap 
  as 
  they 
  breed 
  inside 
  the 
  trees 
  and 
  the 
  females 
  do 
  not 
  seem 
  to 
  

   travel 
  far 
  ; 
  the 
  males, 
  on 
  the 
  contrary, 
  fly 
  a 
  considerable 
  distance. 
  

   In 
  well-kept 
  plantations 
  the 
  beetle 
  is 
  not 
  so 
  common 
  as 
  formerly, 
  

   though 
  11 
  per 
  cent, 
  of 
  young 
  trees 
  (about 
  10 
  years 
  old) 
  were 
  found 
  

   to 
  be 
  badly 
  attacked 
  in 
  many 
  cases. 
  

  

  Bodkin 
  (G. 
  E.). 
  Report 
  of 
  the 
  Economic 
  Biologist 
  of 
  British 
  Guiana 
  

  

  for 
  1912-1913,— 
  Georgetown, 
  1914, 
  10 
  pp. 
  

  

  As 
  regards 
  the 
  sugar-cane 
  pests, 
  Castnia 
  licus 
  was 
  less 
  troublesome, 
  

   but 
  termites 
  more 
  so, 
  owing 
  to 
  the 
  exceptional 
  drought. 
  The 
  work 
  

   of 
  past 
  years 
  in 
  the 
  reduction 
  of 
  Castnia 
  and 
  other 
  cane 
  pests 
  is 
  now 
  

   apparent, 
  except 
  in 
  the 
  case 
  of 
  Diatraea 
  saccharalis, 
  F., 
  and 
  D. 
  canella, 
  

   Hmp. 
  The 
  collection 
  of 
  Diatraea 
  egg-masses, 
  the 
  use 
  of 
  trap-hghts 
  

   and 
  the 
  cutting 
  out 
  of 
  young 
  cane 
  dead 
  hearts, 
  followed 
  by 
  the 
  

   collection 
  of 
  the 
  pupae 
  in 
  them, 
  are 
  all 
  excellent 
  measures 
  if 
  

   properly 
  carried 
  out. 
  The 
  following 
  is 
  a 
  preHminary 
  hst 
  of 
  insect 
  

   enemies 
  of 
  Diatraea, 
  some 
  being 
  original 
  observations 
  : 
  — 
  Tricho- 
  

   gramma 
  minutum, 
  Riley, 
  Prophanurus 
  alecto, 
  Cwfd. 
  ; 
  two 
  undetermined 
  

   species 
  of 
  ants 
  ; 
  the 
  Braconids, 
  Iphiaulax 
  medianus, 
  Cam., 
  Cremnops 
  

   parvifasciatus, 
  Mesostenoideus 
  sp. 
  ; 
  the 
  Chalcid, 
  Heptasmicra 
  curvi- 
  

   lineata. 
  Cam. 
  ; 
  an 
  undetermined 
  Tachinid 
  fly 
  ; 
  an 
  Elaterid 
  larva 
  ; 
  the 
  

   Histerid, 
  Lioderma 
  i-dentatum 
  ; 
  the 
  larva 
  of 
  a 
  Stratiomyid 
  fly. 
  [See 
  

   this 
  Review, 
  Ser. 
  A, 
  ii, 
  p. 
  520.] 
  A 
  list 
  is 
  also 
  given 
  of 
  15 
  new 
  cane 
  pests, 
  

   of 
  minor 
  importance, 
  but 
  which 
  require 
  watching. 
  

  

  Rice 
  pests 
  include 
  the 
  rice 
  caterpillar, 
  Laphygma 
  frugiperda, 
  S. 
  & 
  A., 
  

   [see 
  this 
  Review, 
  Ser. 
  A, 
  i, 
  pp. 
  318 
  & 
  480] 
  and 
  the 
  grass 
  moth, 
  Remigia 
  

   repanda, 
  Fabr., 
  [see 
  this 
  Review, 
  Ser. 
  A, 
  ii, 
  p. 
  519], 
  which 
  were 
  the 
  

   only 
  serious 
  ones. 
  A 
  parasitic 
  fungus, 
  which 
  appeared 
  among 
  a 
  species 
  

   of 
  Pentatomid 
  bug 
  {Tibraca 
  limbativentris, 
  Stal) 
  abundant 
  on 
  rice 
  

   this 
  season, 
  has 
  been 
  briefly 
  studied. 
  The 
  following 
  is 
  a 
  list 
  of 
  insects 
  

   which 
  from 
  time 
  to 
  time 
  have 
  been 
  observed 
  to 
  attack 
  rice 
  in 
  British 
  

   Guiana 
  : 
  — 
  Maenas 
  laboulbenei, 
  Diatraea 
  saccharalis 
  ^ 
  L., 
  Scirpophaga 
  

   albinella, 
  Cramer 
  ; 
  two 
  species 
  of 
  Chrysomelid 
  beetles 
  ; 
  Pseudococcus 
  

   calceolariae, 
  Ckll. 
  ; 
  Tomaspis 
  flavilatera, 
  Urich, 
  Mormidea 
  ypsilon, 
  L., 
  

   Tibraca 
  limbativentris, 
  Stal 
  ; 
  Conocephaloides 
  maxillosus, 
  F. 
  

  

  Para 
  and 
  other 
  rubber 
  trees 
  received 
  a 
  serious 
  set-back 
  through 
  

   defohation 
  by 
  the 
  caterpillars 
  of 
  the 
  cassava 
  hawk-moth, 
  Erinnyis 
  

   (Dilophonota) 
  ello 
  [see 
  this 
  Review, 
  Ser. 
  A, 
  i, 
  pp. 
  139 
  & 
  258], 
  which 
  

   attacks 
  nearly 
  every 
  species 
  of 
  Euphorbiaceae 
  and 
  is 
  thus 
  able 
  to 
  com- 
  

   plete 
  its 
  life-history 
  in 
  the 
  forest 
  or 
  on 
  waste 
  lands. 
  On 
  large 
  areas, 
  

   4 
  lb. 
  of 
  lead 
  arsenate 
  in 
  50 
  gals, 
  of 
  water 
  proved 
  to 
  be 
  an 
  efficient 
  

   spray. 
  The 
  injury 
  anticipated 
  from 
  its 
  increase 
  in 
  numbers 
  was 
  

   prevented 
  by 
  the 
  appearance 
  of 
  the 
  small 
  egg-parasite 
  Telenomus 
  

   dilophonotae, 
  Cam. 
  Up 
  to 
  the 
  present 
  Hevea 
  brasiliensis, 
  as 
  grown 
  in 
  

  

  