﻿610 
  

  

  and 
  is 
  a 
  curative 
  and 
  not 
  a 
  preventive 
  spray. 
  The 
  hot 
  hours 
  of 
  the 
  day 
  

   should 
  be 
  avoided 
  for 
  spraying 
  and 
  very 
  hot 
  summer 
  days, 
  especially 
  

   when 
  the 
  temperature 
  is 
  variable, 
  are 
  unsuitable. 
  

  

  SiLVESTRi 
  (F.). 
  Contribuzione 
  alia 
  conoscenza 
  dei 
  Termitidi 
  e 
  Termi- 
  

   tofili 
  deH'Afriea 
  occidentale. 
  I. 
  Termitidi. 
  A 
  contribution 
  to 
  the 
  

   knowledge 
  of 
  the 
  Termites 
  and 
  Termitophilous 
  Insects 
  of 
  Western 
  

   Africa. 
  I. 
  Termites.] 
  — 
  R. 
  Scuola 
  Sup. 
  Agric, 
  Portici, 
  1914, 
  146 
  pp., 
  

   84 
  figs., 
  1 
  pi. 
  

  

  During 
  the 
  author's 
  quest 
  for 
  fruit-fly 
  parasites 
  in 
  Western 
  Africa 
  

   in 
  1912-1913 
  his 
  spare 
  time 
  was 
  mainly 
  devoted 
  to 
  collecting 
  Termites. 
  

   He 
  secured 
  119 
  forms, 
  including 
  sub-species, 
  and 
  varieties 
  — 
  six 
  species 
  

   from 
  South 
  Africa 
  being 
  included. 
  Forty-five 
  species 
  and 
  twenty-six 
  

   varieties 
  are 
  described 
  as 
  new 
  and 
  ten 
  new 
  genera 
  are 
  founded. 
  The 
  

   geographical 
  distribution 
  of 
  forms 
  is 
  as 
  follows 
  : 
  Senegal, 
  14 
  forms 
  ; 
  

   French 
  Guinea, 
  59 
  ; 
  Gold 
  Coast, 
  20 
  ; 
  Dahomey, 
  5 
  ; 
  Nigeria, 
  17 
  ; 
  

   Kamerun, 
  25 
  ; 
  Congo, 
  5 
  ; 
  Angola, 
  6. 
  

  

  Chauvigne 
  (A.). 
  A 
  propos 
  de 
  rhivernage 
  de 
  TEud^mis. 
  [Concerning 
  

   the 
  Hibernation 
  of 
  Polychrosis 
  botmna.] 
  — 
  Rev. 
  Vitic, 
  Paris, 
  xh, 
  

   no. 
  1068, 
  4th 
  June 
  1914, 
  p. 
  639. 
  

  

  The 
  author 
  has 
  found 
  that 
  the 
  pupae 
  referred 
  to 
  in 
  his 
  previous 
  

   article 
  [see 
  this 
  Review, 
  Ser. 
  A, 
  ii, 
  pp. 
  539] 
  are 
  not 
  those 
  of 
  Polychrosis 
  

   hotrana. 
  The 
  insect 
  in 
  question 
  has 
  been 
  identified 
  as 
  the 
  saw 
  fly, 
  

   Emphytus 
  calceatus, 
  Klug, 
  and 
  its 
  presence 
  in 
  the 
  old 
  wood 
  is 
  probably 
  

   due 
  to 
  an 
  accidental 
  choice 
  of 
  winter 
  refuge, 
  as 
  it 
  does 
  not 
  specially 
  

   attack 
  the 
  vine. 
  

  

  Fabre 
  (H.). 
  Les 
  difl^rentes 
  vari^tes 
  de 
  soufre 
  utilis^es 
  en 
  viticulture. 
  

  

  [The 
  different 
  varieties 
  of 
  sulphur 
  used 
  in 
  vine-growing.] 
  — 
  Pr 
  ogres 
  

   Agric. 
  Vitic, 
  Montpellier, 
  xxxi, 
  no. 
  25, 
  21st 
  June 
  1914, 
  

   pp. 
  782-790. 
  

  

  The 
  world's 
  supply 
  of 
  sulphur 
  comes 
  from 
  Sicily 
  and 
  Louisiana. 
  

   The 
  American 
  product 
  is 
  slightly 
  earthy 
  in 
  colour, 
  owing 
  to 
  the 
  presence 
  

   of 
  bitumen, 
  but 
  its 
  purity 
  is 
  the 
  same 
  within 
  1 
  per 
  cent. 
  Sulphur 
  

   may 
  be 
  had 
  either 
  ground 
  or 
  sublimated. 
  As 
  its 
  efficiency 
  in 
  control 
  

   depends 
  on 
  its 
  fineness 
  it 
  is 
  well 
  to 
  stipulate 
  that 
  the 
  ground 
  sulphur 
  

   should 
  pass 
  a 
  sieve 
  of 
  100 
  or 
  110 
  meshes 
  per 
  27 
  millimetres, 
  and 
  this 
  

   fineness 
  should 
  be 
  guaranteed. 
  Only 
  the 
  best 
  makers 
  can 
  supply 
  the 
  

   110 
  quality. 
  The 
  subHmate 
  is 
  higher 
  priced, 
  but 
  it 
  is 
  cheaper 
  to 
  use 
  

   as 
  it 
  goes 
  further, 
  for 
  20 
  parts 
  (by 
  weight) 
  of 
  subHmate 
  will 
  replace 
  27 
  

   of 
  the 
  ground 
  sulphur. 
  An 
  equal 
  weight 
  of 
  sublimate 
  is 
  bulkier 
  by 
  

   about 
  one-third. 
  Microscopic 
  examination 
  is 
  necessary 
  to 
  distinguish 
  

   between 
  the 
  two 
  varieties, 
  and 
  even 
  this 
  does 
  not 
  enable 
  an 
  admixture 
  

   of 
  ground 
  sulphur 
  to 
  the 
  sublimate 
  to 
  be 
  detected 
  if 
  the 
  addition 
  is 
  

   small. 
  In 
  the 
  process 
  of 
  subHmation, 
  it 
  is 
  impossible 
  to 
  avoid 
  the 
  

   formation 
  of 
  some 
  crystals 
  and, 
  under 
  the 
  microscope, 
  these 
  look 
  

   like 
  pieces 
  of 
  ground 
  sulphur. 
  The 
  law, 
  in 
  France, 
  allows 
  10 
  per 
  cent, 
  

   of 
  crystals 
  to 
  be 
  present 
  in 
  the 
  subHmate 
  and 
  good 
  makes 
  never 
  contain 
  

   so 
  much. 
  [See 
  also 
  this 
  Review 
  Ser. 
  A. 
  i, 
  p. 
  291.] 
  

  

  