﻿151 
  — 
  

  

  tain 
  region 
  of 
  the 
  far 
  West. 
  Prof. 
  Gillette's 
  field 
  experiments 
  showed 
  

   that 
  it 
  could 
  be 
  destroyed 
  by 
  dusting 
  or 
  spraying 
  arsenical 
  poisons 
  on 
  

   the 
  beet 
  leaf. 
  

  

  The 
  Garden 
  Mamestra. 
  

  

  Mamestra 
  trifolii 
  Rott. 
  

  

  {^M. 
  che/wpodii 
  h\h\u.) 
  

   This 
  green 
  larva, 
  striped 
  with 
  rose 
  or 
  pinkish 
  white, 
  with 
  a 
  row 
  of 
  

   darker 
  lines 
  on 
  each 
  side 
  of 
  the 
  back, 
  is 
  found 
  all 
  over 
  Europe 
  and 
  North 
  

   America. 
  It 
  infests 
  a 
  variety 
  

   of 
  garden 
  plants 
  and 
  weeds, 
  and 
  

   sometimes 
  does 
  considerable 
  in- 
  

   jury 
  to 
  beets 
  by 
  eating 
  the 
  leaves 
  

   or 
  even 
  the 
  entire 
  tops 
  of 
  small 
  

   plants, 
  as 
  reported 
  by 
  Bruner 
  in 
  

   Nebraska. 
  We 
  have 
  found 
  it 
  also 
  

   on 
  beets 
  in 
  late 
  September 
  and 
  

   early 
  October 
  on 
  the 
  Experiment 
  

   Station 
  farm 
  in 
  Illinois. 
  In 
  Amer- 
  

   ica 
  it 
  has 
  been 
  noted 
  feeding 
  on 
  

   cabbage, 
  turnips, 
  and 
  numerous 
  

   other 
  garden 
  vegetables, 
  and 
  upon 
  

   lamb's-quarters 
  and 
  purslane 
  

   among 
  the 
  common 
  weeds. 
  It 
  is 
  

   evidently 
  two-brooded, 
  hibernat- 
  

   ing 
  as 
  a 
  pupa, 
  and 
  the 
  moths 
  ap- 
  

   pearing 
  in 
  the 
  early 
  spring. 
  We 
  

   have 
  found 
  them 
  abundant 
  at 
  

   electric 
  lights 
  in 
  May. 
  Larvae 
  of 
  

   the 
  first 
  brood 
  have 
  been 
  taken 
  in 
  

   June 
  and 
  early 
  July, 
  and 
  of 
  the 
  

   second 
  brood 
  in 
  September 
  and 
  early 
  October. 
  Larvae 
  taken 
  from 
  the 
  

   sugar 
  beet 
  September 
  26th 
  and 
  October 
  9th 
  entered 
  the 
  ground 
  for 
  

   pupation 
  between 
  October 
  8th 
  and 
  13th. 
  

  

  Mamestra 
  sp. 
  

   Bruner 
  mentions 
  a 
  larva 
  found 
  abundant 
  in 
  beets 
  at 
  Norfolk, 
  Neb., 
  

   which 
  was 
  about 
  the 
  size 
  and 
  general 
  appearance 
  of 
  the 
  darker 
  form 
  of 
  

   M. 
  trifolii 
  but 
  differed 
  in 
  habits 
  and 
  markings. 
  It 
  was 
  not 
  bred 
  to 
  the 
  

   imago, 
  and 
  its 
  species 
  is 
  consequently 
  unknown. 
  

  

  The 
  Green 
  Beet 
  Leaf-worm. 
  

   Peridroma 
  incivis 
  Guen. 
  

   During 
  1899 
  and 
  1900 
  this 
  green 
  larva, 
  with 
  a 
  white 
  or 
  roseate 
  stripe 
  

   on 
  each 
  side, 
  was 
  the 
  commonest 
  caterpillar 
  on 
  beet 
  leaves 
  in 
  Illinois. 
  

  

  Fig. 
  75. 
  The 
  Garden 
  Mamestra, 
  Mamestra 
  tri- 
  

   folii: 
  a, 
  b, 
  larva; 
  c, 
  pupa; 
  d, 
  adult; 
  e, 
  wing 
  of 
  adult 
  

   enlarged; 
  /, 
  last 
  segment 
  of 
  pupa, 
  ventral 
  view. 
  

   (Riley, 
  U. 
  S. 
  Dept. 
  of 
  Agriculture.) 
  

  

  