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  82 
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  head, 
  antennae, 
  and 
  honey-tubes 
  are 
  black, 
  together 
  with 
  some 
  bars 
  on 
  

   the 
  thoracic 
  segments 
  and 
  some 
  lateral 
  abdominal 
  spots. 
  

  

  Eggs 
  and 
  many 
  wingless 
  females 
  have 
  been 
  found 
  in 
  midwinter; 
  in 
  

   May 
  the 
  lice 
  gradually 
  increase 
  in 
  numbers 
  on 
  the 
  plants; 
  and 
  in 
  the 
  

   latter 
  half 
  of 
  June, 
  according 
  to 
  Professor 
  J. 
  B. 
  Smith, 
  if 
  sufficiently 
  

   numerous 
  and 
  favored 
  by 
  fine 
  weather, 
  an 
  extensive 
  migration 
  of 
  winged 
  

   individuals 
  occurs, 
  rapidly 
  enlarging 
  the 
  infested 
  area. 
  After 
  the 
  first 
  

   week 
  of 
  July 
  this 
  movement 
  of 
  dispersal 
  ceases 
  under 
  ordinary 
  circum- 
  

   stances; 
  but 
  winged 
  lice 
  have 
  been 
  seen 
  as 
  late 
  as 
  August. 
  The 
  sexually 
  

   mature 
  forms 
  have 
  not 
  yet 
  been 
  distinguished. 
  Ants 
  assist 
  to 
  some 
  ex- 
  

   tent 
  in 
  transporting 
  and 
  distributing 
  the 
  lice 
  in 
  summer. 
  

  

  Aphis 
  atriplicis 
  Linn. 
  

  

  Both 
  in 
  America 
  and 
  Europe 
  this 
  is 
  a 
  common 
  species 
  on 
  plants 
  of 
  

   the 
  order 
  Chenopodiacece, 
  especially 
  orache 
  (^Atriplex) 
  in 
  Europe, 
  and 
  

   lamb's-quarters 
  (^Chenopo 
  (1111)71) 
  in 
  America. 
  It 
  is 
  reported 
  by 
  Bruner 
  

   as 
  common 
  on 
  beets 
  in 
  Nebraska. 
  The 
  effect 
  on 
  Atriplex 
  is 
  peculiar. 
  

   The 
  leaf-lice 
  cluster 
  along 
  the 
  midribs, 
  mostly 
  on 
  the 
  upper 
  surface, 
  

   causing 
  a 
  tubular 
  longitudinal 
  rolling 
  up 
  of 
  the 
  leaves.* 
  The 
  species 
  is 
  

   listed 
  from 
  Illinois 
  and 
  Missouri. 
  It 
  is 
  closely 
  related 
  to 
  the 
  preceding, 
  

   and 
  further 
  study 
  may 
  show 
  that 
  the 
  two 
  forms 
  are 
  not 
  distinct. 
  

  

  The 
  eggs 
  are 
  of 
  the 
  usual 
  form 
  and 
  color, 
  and 
  were 
  found 
  with 
  

   sexually 
  perfect 
  individuals 
  in 
  dry 
  rolled 
  leaves 
  of 
  Atriplex. 
  The 
  sum- 
  

   mer 
  females 
  vary 
  from 
  green 
  to 
  black, 
  but 
  are 
  mostly 
  blackish 
  spotted 
  

   with 
  white. 
  The 
  sexually 
  perfect 
  individuals 
  are 
  wingless 
  and 
  much 
  

   smaller 
  than 
  the 
  viviparous 
  form. 
  

  

  Aphis 
  sp. 
  

   A 
  number 
  of 
  wingless 
  females 
  were 
  swept 
  in 
  July 
  from 
  beets 
  in 
  a 
  

   field 
  near 
  Tremont, 
  111., 
  the 
  species 
  of 
  which 
  we 
  have 
  not 
  found 
  de- 
  

   scribed. 
  Not 
  having 
  winged 
  individuals 
  and 
  not 
  being 
  sure 
  of 
  the 
  host 
  

   plant, 
  it 
  seems 
  best 
  to 
  leave 
  the 
  species 
  unnamed. 
  It 
  seems 
  to 
  belong 
  

   to 
  the 
  Nectarophorini 
  of 
  CEstlund, 
  and 
  is 
  easily 
  recognized 
  by 
  two 
  dark 
  

   rings 
  on 
  the 
  antenna, 
  which 
  include 
  the 
  sutures 
  between 
  segments 
  III, 
  

   IV, 
  and 
  V, 
  and 
  by 
  the 
  dark 
  color 
  of 
  the 
  apex 
  of 
  V 
  and 
  the 
  basal 
  part 
  

   and 
  tip 
  of 
  VI 
  (the 
  so-called 
  VI 
  and 
  VII); 
  by 
  the 
  broad 
  conical 
  cauda, 
  

   widest 
  at 
  base; 
  and 
  by 
  the 
  long 
  honey-tubes 
  and 
  antennae, 
  both 
  surpass- 
  

   ing 
  the 
  tip 
  of 
  the 
  body. 
  The 
  antenna 
  are 
  raised 
  on 
  low 
  tubercles. 
  The 
  

   setaceous 
  part 
  of 
  VI 
  is 
  about 
  twice 
  as 
  long 
  as 
  III; 
  the 
  honey-tubes 
  are 
  

   as 
  long 
  as 
  the 
  anterior 
  femora. 
  

  

  Myzi/s 
  achyrantes 
  Monell. 
  

   This 
  was 
  originally 
  described 
  from 
  specimens 
  found 
  on 
  Achyrantes, 
  

   a 
  plant 
  belonging 
  to 
  the 
  pigweed 
  family, 
  and 
  might 
  naturally 
  be 
  looked 
  

  

  ♦Kaltenbach, 
  Die 
  Pflanzenfeinde, 
  p. 
  508. 
  

  

  