﻿week 
  in 
  June, 
  but 
  some 
  of 
  the 
  fields 
  replanted 
  June 
  25th 
  were 
  also 
  de- 
  

   stroyed. 
  

  

  This 
  species 
  occurs 
  throughout 
  the 
  northern 
  part 
  of 
  the 
  United 
  

   States 
  east 
  of 
  the 
  Rocky 
  Mountains, 
  from 
  southern 
  New 
  England 
  to 
  

  

  Georgia, 
  and 
  is 
  also 
  abundant 
  in 
  

  

  the 
  extreme 
  southwest. 
  It 
  has 
  

  

  destroyed 
  beets 
  in 
  New 
  York, 
  

  

  New 
  Jersey, 
  Michigan, 
  Indiana, 
  

  

  Illinois, 
  Nebraska, 
  and 
  Colorado, 
  

  

  and 
  has 
  done 
  serious 
  local 
  injury 
  

  

  to 
  various 
  other 
  crops 
  including 
  

  

  carrots, 
  corn, 
  fruit-grafts, 
  toma- 
  

   toes, 
  clover, 
  potatoes, 
  melons, 
  

  

  beans, 
  strawberries, 
  blackberries, 
  

  

  alfalfa, 
  lettuce, 
  parsnip, 
  egg-plant, 
  

  

  summer 
  savory, 
  sweet-potatoes, 
  

  

  clover,and 
  the 
  cotton 
  plant. 
  Lint- 
  

  

  ner 
  records 
  it 
  as 
  an 
  oak 
  insect, 
  and 
  

  

  it 
  is 
  destructive 
  to 
  a 
  great 
  variety 
  

  

  of 
  weeds 
  including 
  ragweed, 
  night- 
  

   shade, 
  pigweed, 
  cocklebur, 
  plan- 
  

   tain, 
  purslane, 
  etc. 
  

  

  Its 
  life 
  history 
  is 
  imperfectly 
  

  

  known. 
  All 
  stages 
  of 
  the 
  insect 
  

  

  have 
  been 
  found 
  and 
  described, 
  

  

  but 
  the 
  number 
  of 
  generations 
  an- 
  

   nually 
  has 
  not 
  been 
  ascertained 
  

  

  with 
  certainty, 
  and 
  the 
  stage 
  of 
  

  

  hibernation 
  is 
  somewhat 
  in 
  doubt. 
  

  

  In 
  our 
  own 
  extensive 
  collections 
  

  

  the 
  imago 
  of 
  this 
  insect 
  has 
  been 
  

   very 
  abundant 
  in 
  June 
  and 
  July, 
  especially 
  in 
  the 
  former 
  month, 
  and 
  

   has 
  gradually 
  diminished 
  in 
  number 
  until 
  September, 
  none 
  appearing 
  

   later 
  than 
  September 
  nor 
  earlier 
  than 
  June. 
  In 
  many 
  winter 
  collections 
  

   made 
  for 
  the 
  purpose 
  of 
  accumulating 
  lists 
  of 
  hibernating 
  insects 
  

   S. 
  tceniata 
  has 
  not 
  once 
  occurred. 
  Furthermore, 
  larvae 
  collected 
  by 
  us 
  

   from 
  roots 
  of 
  corn 
  in 
  Champaign 
  county. 
  111., 
  May 
  17th 
  had 
  partly, 
  but 
  

   not 
  altogether, 
  transformed 
  to 
  the 
  adult 
  on 
  the 
  17th 
  of 
  June, 
  the 
  pupa 
  

   stage 
  being 
  likewise 
  present 
  at 
  that 
  time. 
  Eggs 
  have 
  been 
  laid, 
  accord- 
  

   ing 
  to 
  Chittenden, 
  from 
  June 
  loth 
  to 
  July 
  Sth. 
  We 
  find, 
  consequently, 
  

   at 
  present 
  no 
  satisfactory 
  evidence 
  of 
  more 
  than 
  one 
  brood 
  or 
  of 
  the 
  

   hibernation 
  of 
  the 
  adult. 
  From 
  the 
  facts 
  now 
  on 
  record 
  it 
  would 
  seem 
  

   most 
  likely 
  that 
  larval 
  hibernation 
  is 
  the 
  rule; 
  that 
  the 
  June 
  and 
  July 
  

   appearance 
  of 
  the 
  beetles 
  is 
  due 
  to 
  the 
  development 
  of 
  the 
  adult 
  at 
  that 
  

  

  Fig. 
  40. 
  The 
  Pale-striped 
  

   Flea-beetle, 
  Systena 
  tceni- 
  

   ata: 
  larva, 
  top 
  view,greatly 
  

   enlarged. 
  

  

  -;:/, 
  

  

  Fig. 
  41. 
  The 
  Pale- 
  

   striped 
  Flea-beetle, 
  Sys- 
  

   tena 
  tcrniata: 
  Iarva,side 
  

   view, 
  greatly 
  enlarged. 
  

  

  