﻿— 
  i6i 
  — 
  

  

  seems 
  inadvisable 
  that 
  beets 
  should 
  be 
  the 
  first 
  crop 
  on 
  new 
  land, 
  or 
  

   that 
  ground 
  should 
  be 
  continued 
  in 
  beets 
  or 
  in 
  any 
  other 
  root 
  crop 
  after 
  

   the 
  pest 
  has 
  made 
  its 
  appearance 
  in 
  the 
  field. 
  

  

  ApJiis 
  iniddletouii 
  Thos. 
  

  

  Occasionally 
  colonies 
  of 
  this 
  root 
  aphis, 
  which 
  had 
  previously 
  been 
  

   found 
  only 
  on 
  roots 
  of 
  certain 
  weeds, 
  were 
  detected 
  by 
  us 
  in 
  1899 
  ^^id 
  

   1900 
  in 
  Illinois 
  on 
  the 
  sugar 
  beet, 
  established 
  among 
  the 
  smaller 
  roots 
  

   on 
  each 
  side 
  of 
  the 
  main 
  mass 
  of 
  the 
  beet. 
  Only 
  a 
  small 
  percentage 
  of 
  

   the 
  beets 
  examined 
  were 
  infested. 
  Two 
  species 
  of 
  ants, 
  Lasiiis 
  niger 
  

   aliein/s 
  and 
  Formica 
  schaufussi, 
  were 
  running 
  about 
  among 
  them 
  in 
  a 
  

   way 
  to 
  indicate 
  an 
  association 
  of 
  the 
  usual 
  form. 
  

  

  The 
  wingless 
  insects 
  of 
  this 
  species 
  are 
  greenish 
  gray, 
  with 
  dark 
  

   spots 
  above, 
  near 
  the 
  sides, 
  and 
  some 
  dark 
  cross-bars 
  in 
  front 
  of 
  the 
  

   middle. 
  The 
  winged 
  individuals 
  have 
  the 
  head 
  and 
  thorax 
  black. 
  

   Thomas 
  found 
  the 
  winged 
  form 
  among 
  the 
  wingless 
  ones 
  during 
  the 
  

   latter 
  part 
  of 
  September, 
  and 
  the 
  eggs 
  occurred 
  at 
  the 
  same 
  time 
  among 
  

   the 
  roots. 
  

  

  The 
  species 
  is 
  recorded 
  as 
  abundant 
  on 
  the 
  roots 
  of 
  various 
  weeds 
  

   of 
  the 
  order 
  Coinpositce 
  — 
  the 
  fleabanes 
  {Ei-igeron), 
  horse- 
  weed 
  {^Ainbrosia 
  

   trifida), 
  goldenrod 
  {Solidago 
  seroti/ia), 
  iron-weed 
  {Verno/iia), 
  and 
  aster. 
  

   It 
  has 
  been 
  recorded 
  from 
  Illinois, 
  Minnesota, 
  and 
  Nebraska. 
  

  

  The 
  Root 
  Mealy 
  Bug. 
  

  

  Dactylopins 
  sp. 
  

  

  A 
  minute 
  whitish 
  insect, 
  resembling 
  a 
  wingless 
  plant-louse, 
  but 
  with 
  

   an 
  (jblong 
  or 
  oval 
  body 
  and 
  very 
  short 
  legs 
  and 
  antennae, 
  may 
  some- 
  

   times 
  be 
  found 
  on 
  sugar 
  beets. 
  Like 
  the 
  beet 
  root-aphis, 
  described 
  

   above, 
  it 
  is 
  usually 
  well 
  covered 
  with 
  a 
  white 
  waxy 
  excretion. 
  Such 
  

   insects 
  infest 
  the 
  roots 
  of 
  a 
  considerable 
  variety 
  of 
  plants. 
  Little 
  is 
  

   known 
  of 
  their 
  life 
  history, 
  and 
  very 
  few 
  have 
  been 
  taken 
  on 
  beets. 
  A 
  

   single 
  immature 
  specimen 
  was 
  seen 
  on 
  a 
  sugar-beet 
  root 
  in 
  July 
  in 
  Illi- 
  

   nois 
  along 
  with 
  examples 
  of 
  Aphis 
  middletonii, 
  and 
  specimens 
  doubtfully 
  

   referred 
  by 
  Cockerell 
  to 
  Dactyiopins 
  soiani 
  Q,W\. 
  were 
  found 
  in 
  Colorado 
  

   on. 
  the 
  crown 
  of 
  the 
  sugar 
  beet. 
  This 
  species 
  occurs 
  on 
  the 
  roots 
  of 
  a 
  

   common 
  western 
  weed, 
  Solanuin 
  rostratuin, 
  and 
  a 
  variety 
  of 
  it 
  infests 
  

   the 
  roots 
  of 
  a 
  plant 
  of 
  the 
  beet 
  family, 
  Atripiex 
  cancscens. 
  

  

  WIRE 
  WORMS. 
  

   Elate 
  rid(C. 
  

   Among 
  the 
  subterranean 
  insect 
  enemies 
  of 
  the 
  beet 
  one 
  may 
  occa- 
  

   sionally 
  find, 
  buried 
  in 
  its 
  substance 
  or 
  eating 
  into 
  it 
  from 
  without, 
  long, 
  

   cylindrical, 
  hard, 
  smooth, 
  reddish 
  brown, 
  worm-like 
  larvae, 
  about 
  an 
  

  

  