﻿520 
  

  

  fire 
  often 
  in 
  company 
  with 
  the 
  rice 
  caterpillar 
  {Laphygnia 
  frugiperda, 
  

   S. 
  and 
  A.), 
  which 
  destroys 
  rice 
  plants 
  of 
  all 
  ages. 
  Fields 
  of 
  Para 
  grass 
  

   {Panicum 
  muticum) 
  grown 
  for 
  fodder 
  are 
  defoliated, 
  the 
  larvae 
  migrating 
  

   to 
  fresh 
  fields 
  in 
  great 
  numbers. 
  During 
  the 
  serious 
  infestation 
  of 
  

   1912 
  the 
  numbers 
  of 
  the 
  second 
  and 
  third 
  generations 
  were 
  reduced 
  

   to 
  normal 
  by 
  parasites. 
  The 
  various 
  instars 
  in 
  the 
  life-history 
  

   of 
  Remigia 
  repanda, 
  in 
  British 
  Guiana, 
  correspond 
  with 
  those 
  described 
  

   in 
  detail 
  by 
  Dyar 
  (Proc. 
  U.S. 
  Nat. 
  Museum, 
  xxiii, 
  p. 
  276) 
  ; 
  the 
  egg 
  

   period 
  lasts 
  3 
  or 
  4 
  days, 
  the 
  larval 
  14 
  to 
  17 
  days, 
  and 
  the 
  pupal 
  9 
  to 
  10 
  

   days. 
  The 
  larva 
  is 
  called 
  by 
  the 
  Creoles 
  the 
  " 
  measure 
  worm." 
  The 
  

   natural 
  parasites, 
  which 
  undoubtedly 
  exist 
  in 
  British 
  Guiana, 
  have 
  not 
  

   yet 
  been 
  obtained. 
  The 
  Coccinellid, 
  Megilla 
  maculata, 
  de 
  Geer, 
  and 
  

   the 
  Demarara 
  robin 
  {Leistes 
  guianensis) 
  feed 
  on 
  the 
  larvae. 
  On 
  sugar 
  

   estates 
  the 
  usual 
  control 
  measure 
  in 
  small 
  infestations 
  is 
  hand- 
  

   picking, 
  while 
  dry 
  powdered 
  arsenate 
  of 
  lead 
  is 
  also 
  recommended 
  as 
  

   being 
  equally 
  satisfactory 
  and 
  cheaper. 
  When 
  nursery-beds 
  of 
  rice 
  are 
  

   attacked, 
  flooding 
  is 
  an 
  effective 
  method, 
  as 
  advised 
  against 
  the 
  rice 
  

   caterpillar 
  [see 
  this 
  Revieiv, 
  Ser. 
  A, 
  i, 
  p. 
  318]. 
  The 
  value 
  of 
  a 
  crop 
  

   of 
  Para 
  grass 
  hardly 
  allows 
  of 
  control 
  measures, 
  but 
  where 
  there 
  is 
  a 
  

   severe 
  infestation, 
  the 
  field 
  should 
  be 
  burnt 
  after 
  the 
  larvae 
  have 
  

   pupated. 
  

  

  Parasite 
  Determinations. 
  — 
  Jl. 
  Bd. 
  Agric, 
  Brit. 
  Guiana, 
  Georgetown^ 
  

   vii, 
  no. 
  4, 
  April 
  1914, 
  p. 
  200. 
  

  

  The 
  British 
  Guiana 
  Board 
  of 
  Agriculture 
  has 
  recently 
  received 
  deter- 
  

   minations 
  from 
  Mr. 
  J. 
  C. 
  Crawford 
  of 
  several 
  insect 
  parasites. 
  The 
  

   black 
  parasite 
  so 
  often 
  found 
  in 
  the 
  eggs 
  of 
  Diatraea 
  saccharalis 
  and 
  D. 
  

   canella, 
  in 
  the 
  carie-fields 
  of 
  British 
  Guiana 
  is 
  named 
  Prophanurus 
  

   alecto, 
  Cwfd., 
  sp. 
  n. 
  Other 
  determinations 
  are 
  as 
  follows 
  : 
  Arrheno- 
  

   phagus 
  chionaspidis, 
  Auriv., 
  bred 
  from 
  Chionaspis 
  citri, 
  Comst., 
  and 
  

   Hemichionaspis 
  minor, 
  Mask. 
  ; 
  Leptomastix 
  dactylopii, 
  How., 
  bred 
  

   from 
  Pseudococcus 
  citri, 
  Risso 
  ; 
  Prophanurus 
  thais, 
  Cwfd., 
  sp. 
  n., 
  bred 
  

   from 
  the 
  eggs 
  of 
  a 
  Pentatomid 
  bug 
  ; 
  Holcencyrtus 
  calypso, 
  Cwfd., 
  sp. 
  

   n., 
  and 
  Elachertus 
  meridionalis, 
  Cw^fd., 
  sp. 
  n., 
  bred 
  from 
  larvae 
  of 
  

   Calpodes 
  ethlius. 
  Cram. 
  ; 
  Aphanurus 
  hodhinii, 
  Cwfd., 
  sp. 
  n., 
  bred 
  from 
  

   ova 
  of 
  Empicoris 
  variolosus 
  L. 
  (Pentatomidae) 
  ; 
  Chalcis 
  pandora, 
  

   Cwfd., 
  sp. 
  n., 
  bred 
  from 
  the 
  pupa 
  of 
  a 
  Hesperid 
  butterfly 
  on 
  sugar- 
  

   cane 
  ; 
  Aplastomorplia 
  pratti, 
  Cwfd., 
  bred 
  from 
  Lasiodemia 
  serricorne, 
  

   F. 
  ; 
  Prophanurus 
  minutissinius, 
  Ashm., 
  bred 
  from 
  the 
  ova 
  of 
  a 
  

   Noctuid 
  moth. 
  

  

  Predaceous 
  Coccinellidae 
  in 
  British 
  Guiana. 
  — 
  Jl. 
  Bd. 
  Agric. 
  Brit. 
  Guiana^ 
  

   Georgetown, 
  vii, 
  no. 
  4, 
  April 
  1914, 
  p. 
  200-201. 
  

  

  Through 
  the 
  Imperial 
  Bureau 
  of 
  Entomology 
  the 
  following 
  deter- 
  

   minations 
  have 
  been 
  received 
  of 
  Coccinellidae 
  w^hich 
  are 
  exceedingly 
  

   useful 
  in 
  destroying 
  harmful 
  Coccidae 
  in 
  British 
  Guiana 
  : 
  Azya 
  

   pontbrianti, 
  Muls., 
  preying 
  on 
  Saissetia 
  hemisphaerica,Taig.,SindS.ol€ae, 
  

   Bern.; 
  Hyperaspis 
  trilineata, 
  Muls., 
  destroying 
  the 
  sugar-cane 
  mealy- 
  

   bug 
  {Ripersia 
  sp.) 
  ; 
  and 
  Brachyacantha 
  lO-punctata, 
  Mehh.., 
  predaceous 
  

   on 
  Pseudococcus 
  sp. 
  

  

  