﻿410 
  

  

  and 
  as 
  the 
  cost 
  of 
  these 
  is 
  rather 
  high 
  it 
  is 
  important 
  they 
  should 
  only 
  

   be 
  used 
  when 
  actually 
  necessary. 
  At 
  Mesnil, 
  for 
  instance, 
  the 
  author 
  

   discountenanced 
  the 
  use 
  of 
  all 
  the 
  traps 
  available 
  and 
  only 
  a 
  few 
  were 
  

   lit. 
  The 
  abundance 
  of 
  their 
  catches 
  seemed 
  to 
  point 
  to 
  the 
  advisability 
  

   of 
  using 
  them, 
  but 
  analysis 
  showed 
  Clysia 
  to 
  be 
  present 
  in 
  but 
  a 
  small 
  

   proportion, 
  from 
  1 
  to 
  3 
  per 
  cent., 
  and 
  Polychrosis 
  only 
  from 
  12 
  to 
  18 
  

   per 
  cent. 
  Regular 
  analysis 
  will 
  probably 
  permit 
  of 
  reducing 
  the 
  

   working 
  period 
  of 
  these 
  traps 
  by 
  at 
  least 
  one-quarter, 
  if 
  not 
  by 
  one- 
  

   third. 
  «d 
  

  

  Vayssiere 
  (P.). 
  Note 
  sur 
  les 
  Coccides 
  de 
  I'Afrique 
  occidentale. 
  [Note 
  

   on 
  West 
  African 
  Coccids.] 
  — 
  Ann. 
  du 
  Service 
  des 
  Epiphyties 
  (1912), 
  

   Paris, 
  1913, 
  pp. 
  424-432, 
  5 
  figs. 
  [Received 
  18th 
  Feb. 
  1914.] 
  

  

  This 
  paper 
  includes 
  the 
  description 
  of 
  a 
  new 
  Coccid, 
  named 
  

   Lojphococcns 
  vuiUeti, 
  sp. 
  n., 
  found 
  by 
  J. 
  Vuillet 
  at 
  Kulikoro 
  on 
  Acacia 
  

   pennata, 
  Willdenow. 
  A 
  list 
  of 
  73 
  species 
  of 
  Coccids 
  found 
  in 
  French 
  

   West 
  Africa 
  and 
  the 
  neighbouring 
  regions 
  (Gold 
  Coast, 
  Togoland, 
  

   Nigeria 
  and 
  the 
  Cameroons) 
  is 
  given, 
  the 
  habitat 
  and 
  food-plant 
  being 
  

   specified. 
  A 
  bibhography 
  of 
  29 
  works 
  is 
  also 
  included. 
  

  

  La 
  Destruction 
  du 
  Puceron. 
  [To 
  destroy 
  Aphids.] 
  — 
  Rev. 
  Agric. 
  Vitic. 
  

   Afrique 
  Nord, 
  Algiers, 
  xii, 
  no. 
  105, 
  14th 
  Mar. 
  1914, 
  p. 
  244. 
  

  

  For 
  destroying 
  aphids 
  in 
  orchards 
  and 
  orange 
  plantations, 
  a 
  mixture 
  

   of 
  nicotin, 
  methylated 
  spirit, 
  sulphoricinate 
  of 
  soda 
  and 
  carbonate 
  of 
  

   potash 
  has 
  given 
  good 
  results, 
  in 
  so 
  far 
  that 
  it 
  kills 
  the 
  individuals 
  it 
  

   reaches. 
  Methylated 
  spirit 
  alone 
  is 
  considered 
  efficacious, 
  but 
  not 
  

   all 
  plants 
  are 
  able 
  to 
  w^ithstand 
  its 
  action, 
  and 
  in 
  all 
  cases 
  it 
  should 
  

   be 
  applied 
  in 
  small 
  quantities 
  with 
  a 
  brush, 
  care 
  being 
  taken 
  not 
  to 
  

   injure 
  the 
  foliage 
  or 
  stems. 
  

  

  Marchal 
  (P.). 
  La 
  Cochylis 
  et 
  I'Eud^mis 
  en 
  1912. 
  [Clysia 
  ambiguella, 
  

   Hb., 
  and 
  Polychrosis 
  botrana, 
  Schiff. 
  in 
  1912.] 
  — 
  Ann. 
  du 
  Service 
  

   des 
  Epiphyties 
  (1912), 
  Paris, 
  1913, 
  pp. 
  248-252. 
  [Received 
  18th 
  

   Feb. 
  1914.] 
  

  

  Clysia 
  ambiguella 
  did 
  not 
  cause 
  important 
  damage 
  in 
  France 
  in 
  1912. 
  

   Polychrosis 
  botrana 
  was 
  generally 
  less 
  plentiful 
  than 
  before, 
  though 
  still 
  

   present 
  in 
  considerable 
  numbers 
  in 
  infected 
  districts 
  and 
  even 
  spreading 
  

   in 
  the 
  South, 
  while 
  at 
  Montpellier 
  it 
  had 
  spread 
  from 
  the 
  vine-arbours 
  

   to 
  the 
  vineyards. 
  The 
  early 
  vintage 
  in 
  1911 
  accounts 
  for 
  the 
  all 
  

   round 
  decrease 
  of 
  P. 
  botrana 
  in 
  the 
  Bordelais, 
  except 
  in 
  the 
  Sauterne 
  

   and 
  Barsac 
  regions, 
  where 
  the 
  peculiar 
  method 
  of 
  gathering 
  is 
  to 
  blame. 
  

   Those 
  vineyards 
  which 
  were 
  subjected 
  to 
  insecticide 
  treatment, 
  

   particularly 
  by 
  nicotin, 
  were 
  certainly 
  less 
  affected. 
  In 
  Champagne, 
  

   M. 
  Chatenay 
  observed 
  that 
  Malachius 
  had 
  helped 
  the 
  control 
  due 
  to 
  

   the 
  dry 
  weather 
  of 
  the 
  preceding 
  year 
  and 
  nearly 
  all 
  the 
  pupae 
  still, 
  

   present 
  in 
  the 
  winter 
  were 
  destroyed. 
  In 
  experiments 
  on 
  P. 
  botrana, 
  

   M. 
  Feytaud 
  has 
  been 
  able 
  to 
  confirm 
  his 
  previous 
  tests 
  regarding 
  the 
  

   remarkable 
  aborting 
  action 
  of 
  nicotin 
  on 
  the 
  eggs, 
  which 
  makes 
  it 
  

   superior 
  to 
  other 
  insecticides 
  in 
  vineyard 
  practice. 
  Lead 
  arsenate 
  

   and 
  nicotin 
  as 
  preventives, 
  and 
  pyrethrum 
  and 
  nicotin 
  as 
  curatives, 
  

   are 
  the 
  only 
  substances 
  of 
  much 
  practical 
  value. 
  A 
  solution 
  of 
  1*5 
  to 
  2 
  

  

  