﻿82 
  

  

  pusfftJntus, 
  L., 
  some 
  predaceous 
  bugs, 
  and 
  the 
  parasite 
  LysipMebus 
  

   cardui, 
  Marshall, 
  var. 
  ; 
  the 
  latter 
  playing 
  an 
  important 
  part 
  in 
  the 
  

   destruction 
  of 
  the 
  insects. 
  

  

  Schizoneura 
  ulmi. 
  These 
  lice 
  were 
  found 
  in 
  May 
  on 
  JJlmus 
  effusa, 
  

   Willd., 
  and 
  on 
  Ulmus 
  montana, 
  With., 
  in 
  galls 
  on 
  the 
  leaves 
  ; 
  the 
  

   second 
  generation 
  consisted 
  of 
  winged 
  females, 
  which 
  migrated 
  during 
  

   June 
  to 
  the 
  roots 
  of 
  red 
  and 
  black 
  currants 
  {Sch. 
  fodiens, 
  Buckt.). 
  In 
  

   September 
  and 
  October 
  the 
  winged 
  sexes 
  flew 
  back 
  to 
  the 
  chief 
  host 
  

   plants. 
  The 
  author 
  states 
  that 
  they 
  are 
  distinctly 
  injurious 
  to 
  currants 
  

   when 
  present 
  in 
  any 
  numbers. 
  The 
  only 
  remedy 
  is 
  to 
  remove 
  all 
  elm 
  

   trees 
  from 
  the 
  orchards 
  attacked, 
  as 
  they 
  winter 
  on 
  elms, 
  and 
  cannot 
  

   exist 
  without 
  them. 
  

  

  Macrosiphum 
  rubi. 
  This 
  species 
  was 
  found 
  in 
  July, 
  and 
  afterwards 
  

   during 
  the 
  whole 
  summer 
  and 
  autumn 
  on 
  leaves 
  of 
  raspberry 
  bushes, 
  

   but 
  always 
  in 
  small 
  numbers. 
  No 
  damage 
  by 
  them 
  was 
  noticed. 
  

  

  Aphis 
  idaei. 
  Found 
  on 
  raspberry 
  bushes 
  in 
  May 
  and 
  during 
  June 
  ; 
  

   they 
  disappeared 
  afterwards. 
  The 
  damage 
  done 
  by 
  them 
  to 
  rasp- 
  

   berries 
  is 
  great. 
  

  

  Aphis 
  mordvilkiana, 
  sp. 
  nov. 
  This 
  new 
  species 
  was 
  found 
  by 
  the 
  

   author 
  in 
  September 
  underneath 
  leaves 
  of 
  raspberry 
  bushes. 
  He 
  

   thinks 
  it 
  probable 
  that 
  the 
  lice 
  were 
  there 
  before, 
  but 
  were 
  not 
  dis- 
  

   tinguished 
  by 
  him 
  from 
  larvae 
  of 
  Macrosiphum 
  rubi, 
  Kit., 
  which 
  they 
  

   xesemble 
  at 
  first 
  sight. 
  They 
  rested 
  on 
  the 
  leaves 
  singly, 
  chiefly 
  along 
  

   the 
  veins 
  ; 
  underneath 
  one 
  leaf 
  some 
  dozens 
  of 
  specimens 
  were 
  found. 
  

   All 
  the 
  specimens 
  noticed 
  were 
  wingless 
  females 
  and 
  their 
  larvae 
  ; 
  no 
  

   winged 
  females, 
  nymphae, 
  or 
  males 
  were 
  found. 
  On 
  October 
  15th, 
  

   the 
  author 
  found 
  groups 
  of 
  eggs 
  of 
  this 
  species 
  on 
  branches 
  of 
  raspberry 
  

   bushes, 
  near 
  the 
  buds. 
  The 
  majority 
  of 
  the 
  eggs 
  had 
  already 
  turned 
  

   black, 
  but 
  freshly 
  laid 
  eggs, 
  as 
  well 
  as 
  ovipositing 
  females 
  were 
  also 
  

   found. 
  

  

  Parker 
  (W. 
  B.). 
  Flour 
  paste 
  as 
  a 
  control 
  for 
  red 
  spiders 
  and 
  as 
  a 
  

   spreader 
  for 
  contact 
  insecticides. 
  — 
  U.S. 
  Dept. 
  Agric. 
  Bureau 
  

   Entom., 
  Washington, 
  Circ. 
  no. 
  166, 
  30th 
  Jan. 
  1913, 
  5 
  pp., 
  2 
  

   figs. 
  

  

  Flour 
  paste 
  is 
  not 
  only 
  a 
  suitable 
  " 
  spreader 
  " 
  for 
  lime-sulphur 
  

   solutions, 
  but 
  it 
  apparently 
  serves, 
  to 
  some 
  extent, 
  as 
  an 
  active 
  

   insecticide. 
  Each 
  gallon 
  of 
  paste 
  contains 
  1 
  lb. 
  of 
  flour, 
  and 
  the 
  addition 
  

   of 
  four 
  gallons 
  of 
  paste 
  to 
  100 
  gallons 
  of 
  lime-sulphur 
  causes 
  the 
  spray 
  

   to 
  adhere 
  to 
  the 
  leaves 
  as 
  a 
  thin 
  film, 
  increasing 
  its 
  efficiency 
  almost 
  

   threefold, 
  mainly 
  owing 
  to 
  the 
  spreading 
  effect 
  of 
  the 
  paste. 
  A 
  series 
  

   of 
  trials 
  was 
  made 
  with 
  nicotin 
  sulphate 
  against 
  the 
  hop 
  aphis 
  

   (Phorodon 
  humuli) 
  in 
  which 
  flour 
  paste 
  at 
  the 
  rate 
  of 
  four 
  gallons 
  to 
  100 
  

   gallons 
  of 
  the 
  nicotin 
  sulphate 
  solution, 
  at 
  strengths 
  of 
  one 
  in 
  2,000, 
  

   and 
  one 
  in 
  3,000 
  was 
  employed. 
  In 
  these 
  trials 
  from 
  99 
  to 
  100 
  per 
  cent, 
  

   of 
  the 
  aphides 
  were 
  destroyed. 
  It 
  was 
  observed 
  that 
  many 
  of 
  the 
  

   smaller 
  aphides 
  were 
  pasted 
  on 
  to 
  the 
  leaves. 
  Accordingly, 
  flour 
  paste 
  

   without 
  any 
  other 
  insecticide 
  was 
  tried, 
  and 
  when 
  used 
  at 
  the 
  rate 
  of 
  

   eight 
  gallons 
  (= 
  8 
  lb. 
  flour) 
  in 
  100 
  gallons 
  of 
  water 
  or 
  even 
  stronger 
  

   (say 
  10-100 
  or 
  even 
  12-100) 
  most 
  of 
  the 
  young 
  and 
  tender 
  aphides 
  

   (97 
  per 
  cent.) 
  and 
  of 
  the 
  red 
  spiders 
  {Tetrayiychus 
  bimaculatus) 
  were 
  

   killed. 
  No 
  damage 
  was 
  done 
  to 
  the 
  hop 
  plants, 
  even 
  when 
  in 
  full 
  

  

  