﻿646 
  

  

  d'Herculais 
  (J. 
  K.). 
  Correlation 
  entre 
  la 
  Mortality 
  des 
  Allan 
  thcs 
  

   (Ailanthus 
  glandulosa, 
  Desf 
  .) 
  et 
  la 
  Disparition 
  du 
  Bombycid 
  (Samia 
  

   cynthia, 
  Drury), 
  son 
  Hote. 
  [Correlation 
  between 
  the 
  mortality 
  of 
  

   Ailanthus 
  (Ailanthus 
  glandulosa, 
  Desf.) 
  and 
  the 
  disappearance 
  of 
  

   the 
  Bombycid 
  (Samia 
  cynthia) 
  dependent 
  on 
  it.] 
  — 
  C. 
  R. 
  Acad. 
  

   Sci,, 
  Paris, 
  clix, 
  no. 
  2, 
  13th 
  July 
  1914, 
  pp. 
  210-212. 
  

  

  Ailanthus 
  glandulosa, 
  which 
  was 
  introduced 
  into 
  Europe 
  from 
  

   China 
  two 
  hundred 
  years 
  ago 
  as 
  a 
  suitable 
  food-plant 
  for 
  silkworms, 
  

   is 
  apparently 
  dying 
  out 
  in 
  France, 
  owing 
  to 
  a 
  disease 
  which 
  produces 
  

   large 
  excrescences 
  on 
  the 
  roots. 
  The 
  mortality 
  amongst 
  these 
  trees 
  

   reacts 
  on 
  the 
  caterpillars 
  of 
  Attacus 
  (Samia) 
  cynthia 
  which 
  feed 
  on 
  

   them 
  and 
  accounts 
  for 
  the 
  present 
  rarity 
  of 
  these 
  insects. 
  

  

  Urich 
  (F. 
  W.). 
  Entomologist's 
  Report. 
  — 
  Minutes 
  of 
  the 
  Meetitig 
  of 
  

   the 
  Trinidad 
  Bd. 
  Agric, 
  no. 
  6, 
  17th 
  July 
  1914, 
  p. 
  33. 
  

  

  The 
  first 
  sign 
  of 
  froghoppers, 
  consisting 
  of 
  adults 
  and 
  nymphs, 
  was 
  

   observed 
  on 
  2nd 
  June. 
  Fields 
  were 
  sprayed 
  with 
  spores 
  of 
  the 
  green 
  

   muscardine 
  fungus 
  on 
  30th 
  June, 
  and 
  on 
  14th 
  July 
  dead 
  froghoppers 
  

   were 
  collected 
  on 
  which 
  the 
  fungus 
  was 
  growing. 
  Fields 
  burnt 
  by 
  

   accident 
  showed 
  very 
  few 
  nymphs 
  as 
  compared 
  with 
  the 
  unburnt 
  

   parts 
  ; 
  this 
  was 
  no 
  doubt 
  due 
  to 
  the 
  eggs 
  having 
  been 
  deposited 
  

   mostly 
  in 
  the 
  trash 
  instead 
  of 
  in 
  the 
  ground. 
  In 
  a 
  field 
  where 
  the 
  

   vermilion 
  egg-parasite 
  was 
  established 
  last 
  year, 
  there 
  have 
  been 
  very 
  

   few 
  nymphs 
  observed 
  when 
  the 
  rains 
  set 
  in. 
  The 
  small 
  moth 
  borer, 
  

   Diatraea, 
  had 
  been 
  doing 
  some 
  damage 
  to 
  sugar-cane 
  and 
  numerous 
  

   trap 
  lights 
  should 
  be 
  used 
  for 
  catching 
  the 
  moths, 
  and 
  the 
  caterpillars 
  

   should 
  be 
  cut 
  out. 
  Cacao 
  beetles 
  and 
  worms 
  were 
  still 
  being 
  caught 
  

   in 
  some 
  parts 
  of 
  the 
  Island, 
  but 
  they 
  were 
  not 
  as 
  numerous 
  as 
  during 
  

   the 
  dry 
  season. 
  Caterpillars 
  and 
  leaf 
  -eating 
  beetles 
  were 
  more 
  in 
  

   evidence, 
  but 
  no 
  serioas 
  outbreak 
  had 
  been 
  reported. 
  In 
  some 
  

   localities 
  where 
  the 
  coconut 
  scale, 
  Asjpidiotus 
  destructor, 
  had 
  obtained 
  

   a 
  good 
  footing 
  during 
  the 
  dry 
  season, 
  numerous 
  small 
  predaceous 
  

   beetles 
  have 
  been 
  devouring 
  the 
  scales. 
  In 
  cases 
  where 
  spraying 
  

   against 
  the 
  scale 
  has 
  to 
  be 
  practised, 
  lime-sulphur 
  should 
  be 
  used. 
  

  

  Destruction 
  de 
  la 
  " 
  Fourmi 
  manioc 
  " 
  par 
  Tanhydride 
  sulfureux 
  Iiqu6fi6 
  

  

  [Destruction 
  of 
  manioc 
  ants 
  by 
  means 
  of 
  liquid 
  sulphurous 
  

   anhydride.] 
  — 
  Revue 
  Scient., 
  Paris, 
  18th 
  July 
  1914, 
  pp. 
  83-84. 
  

  

  The 
  manioc 
  ant 
  (Atta 
  sexdens, 
  L.) 
  is 
  one 
  of 
  the 
  most 
  troublesome 
  

   insect 
  pests 
  in 
  Guiana, 
  and 
  was 
  the 
  cause 
  of 
  great 
  loss 
  to 
  the 
  French 
  

   colony 
  in 
  1913-1914. 
  To 
  combat 
  the 
  insects, 
  the 
  practice 
  has 
  been 
  

   to 
  treat 
  the 
  ant-hills 
  with 
  insecticides 
  such 
  as 
  carbon 
  bisulphide. 
  

   According 
  to 
  Dr. 
  G. 
  Devez, 
  Hquid 
  sulphurous 
  anhydride 
  is 
  an 
  efficient 
  

   insecticide 
  for 
  this 
  purpose. 
  The 
  liquified 
  gas 
  is 
  carried 
  to 
  the 
  ant 
  

   hill 
  in 
  steel 
  vessels, 
  which 
  are 
  provided 
  with 
  a 
  length 
  of 
  flexible 
  

   bronze 
  tubing 
  74 
  centimetres 
  long 
  terminating 
  in 
  a 
  copper 
  nozzle. 
  

   This 
  is 
  pierced 
  with 
  holes 
  at 
  its 
  extremity 
  to 
  allow 
  the 
  emission 
  of 
  

   the 
  gas, 
  which 
  is 
  forced 
  into 
  the 
  different 
  openings 
  of 
  the 
  ant-hill 
  ; 
  

   8 
  lb. 
  of 
  liquid 
  anhydride 
  is 
  sufficient 
  to 
  destroy 
  a 
  large 
  colony. 
  

  

  