﻿510 
  

  

  generation 
  returns 
  to 
  the 
  spring 
  host-plant. 
  These 
  give 
  rise 
  to 
  a 
  

   sexual 
  generation 
  which 
  produces 
  the 
  winter-eggs. 
  The 
  autumn 
  

   lice 
  which 
  are 
  less 
  numerous, 
  do 
  less 
  damage, 
  as 
  the 
  loss 
  of 
  sap 
  at 
  

   that 
  time 
  of 
  year 
  is 
  less 
  serious. 
  This 
  species 
  winters 
  on 
  the 
  elm 
  

   and 
  migrates 
  in 
  the 
  summer 
  to 
  the 
  fruit 
  bushes. 
  Aphis 
  varians, 
  

   sp. 
  n. 
  (white-cornicled 
  currant 
  aphid) 
  is 
  a 
  very 
  abundant 
  species, 
  

   possibly 
  synonymous 
  with 
  grossulariae, 
  Kalt., 
  which 
  is 
  found 
  upon 
  

   cultivated 
  currant, 
  flowering 
  currant 
  and 
  wild 
  gooseberry 
  during 
  

   May 
  and 
  June, 
  and 
  was 
  reported 
  as 
  very 
  serious 
  in 
  West 
  Paris, 
  Maine, 
  

   in 
  1910-11-12. 
  In 
  Maine, 
  the 
  stem-mother 
  matures 
  early 
  in 
  

   May, 
  and 
  is 
  found 
  on 
  the 
  under-surface 
  of 
  the 
  leaf, 
  which 
  puckers 
  

   considerably. 
  The 
  third 
  generation 
  appears 
  early 
  in 
  June, 
  and 
  when 
  

   the 
  wings 
  have 
  developed, 
  migration 
  to 
  the 
  summer 
  food-plant 
  

   occurs. 
  

  

  Aphis 
  sanborni, 
  sp. 
  n. 
  ; 
  this 
  green 
  gooseberry 
  aphid 
  is 
  probably 
  

   the 
  species 
  described, 
  but 
  not 
  named, 
  by 
  Sanborn 
  in 
  ' 
  Kansas 
  

   Aphididae' 
  (1904), 
  pp. 
  50-51 
  and 
  fig. 
  71. 
  It 
  was 
  found 
  in 
  1913, 
  at 
  

   High 
  Moor 
  Farm, 
  and 
  the 
  collection 
  taken 
  on 
  28th 
  May 
  comprised 
  

   stem-mothers, 
  apterous 
  females 
  of 
  the 
  second 
  generation 
  and 
  the 
  

   third 
  generation, 
  which 
  points 
  to 
  the 
  gooseberry 
  as 
  the 
  winter 
  host, 
  

   though 
  the 
  full 
  life-cycle 
  has 
  not 
  been 
  followed. 
  

  

  Rhopalosiphum 
  lactucae 
  (?) 
  Kalt., 
  is 
  common 
  in 
  Maine 
  in 
  spring 
  

   upon 
  currants, 
  and 
  is 
  probably 
  the 
  same 
  as 
  that 
  found 
  on 
  sow 
  

   thistle 
  (Sonchus 
  arvensis), 
  in 
  summer, 
  for 
  it 
  agrees 
  with 
  lactucae 
  

   recorded 
  from 
  Sonchus 
  in 
  Germany. 
  The 
  leaves 
  do 
  not 
  cluster 
  so 
  

   tightly 
  as 
  do 
  those 
  attacked 
  by 
  A. 
  varians. 
  During 
  the 
  end 
  of 
  June, 
  

   alate 
  and 
  apterous 
  pupae 
  and 
  nymphs 
  are 
  still 
  found 
  on 
  the 
  currant, 
  

   later 
  the 
  alate 
  females 
  appear 
  to 
  migrate 
  to 
  lettuce 
  and 
  sow-thistle. 
  

  

  Myzus 
  ribis, 
  L., 
  only 
  attacks 
  the 
  leaves, 
  forming 
  red 
  or 
  yellow 
  

   blisters, 
  one 
  result 
  being 
  the 
  premature 
  ripening 
  of 
  the 
  fruit. 
  The 
  

   stem-mother 
  matures 
  in 
  Maine 
  about 
  mid-May, 
  and 
  the 
  second 
  gen- 
  

   eration 
  appears 
  to 
  be 
  both 
  alate 
  and 
  apterous. 
  Both 
  these 
  forms 
  are 
  

   found 
  on 
  currant 
  as 
  late 
  as 
  mid-July. 
  The 
  summer 
  food-plant 
  is 
  

   unknown, 
  although 
  M, 
  ribis 
  has 
  a 
  world-wide 
  distribution. 
  M. 
  dispar,. 
  

   sp. 
  n., 
  is 
  closely 
  allied 
  to 
  the 
  last 
  species, 
  the 
  differences 
  though 
  slight 
  

   are 
  constant. 
  Macrosiphum 
  lactucae, 
  a 
  common 
  species 
  on 
  cultivated 
  

   currant 
  and 
  gooseberry, 
  is 
  provisionally 
  recorded, 
  though 
  transfers 
  

   to 
  Sonchus 
  or 
  lettuce 
  have 
  not 
  been 
  yet 
  successful. 
  Schizoneura 
  

   ulmi 
  (fodieks), 
  though 
  not 
  yet 
  recorded 
  on 
  the 
  gooseberry 
  or 
  currant 
  

   in 
  America, 
  is 
  known 
  in 
  Europe. 
  These 
  are 
  the 
  summer 
  food-plants, 
  

   the 
  English 
  elm, 
  Ulmus 
  campestris, 
  harbouring 
  this 
  species 
  through 
  

   the 
  winter 
  and 
  in 
  spring 
  [see 
  this 
  Review, 
  Ser. 
  A, 
  ii, 
  p. 
  208]. 
  

  

  Capus 
  (J.). 
  Le 
  Traitement 
  de 
  I'Eud^mis. 
  [The 
  treatment 
  of 
  Poly- 
  

   chrosis.] 
  — 
  Rev. 
  Agric. 
  et 
  Vitic 
  de 
  VAJrique 
  du 
  Nord, 
  Algiers, 
  xii, 
  

   no. 
  Ill, 
  25th 
  April 
  1914, 
  pp. 
  395-396. 
  

  

  The 
  treatment 
  instituted 
  by 
  the 
  author 
  and 
  by 
  Dr. 
  Feytaud 
  in 
  

   1912 
  against 
  the 
  first 
  generation 
  of 
  the 
  vine-moth, 
  Polychrosis 
  botrana^ 
  

   consisted 
  of 
  spraying 
  the 
  vines 
  with 
  a 
  Bordeaux 
  mixture 
  containing 
  

   nicotin. 
  Recent 
  experiments 
  have 
  shown 
  that 
  the 
  best 
  results 
  are 
  

   obtained 
  when 
  the 
  spray 
  is 
  used 
  at 
  the 
  time 
  when 
  the 
  adult 
  moths 
  

   are 
  most 
  numerous. 
  In 
  the 
  Department 
  of 
  Gironde, 
  this 
  period 
  was 
  

  

  