﻿— 
  125 
  — 
  

  

  supporting 
  a 
  protecting 
  shield 
  composed 
  of 
  cast 
  skins 
  and 
  excrement. 
  

   The 
  pupa 
  is 
  similar 
  in 
  appearance, 
  but 
  lacks 
  the 
  elongate 
  tails, 
  and 
  is 
  

   attached 
  to 
  the 
  under 
  side 
  of 
  the 
  leaf. 
  The 
  beetles 
  are 
  turtle-shape, 
  

   pale 
  rusty 
  brown 
  with 
  dark 
  mottlings. 
  They 
  feed 
  on 
  the 
  upper 
  side 
  of 
  

   the 
  leaves, 
  gnawing 
  the 
  surface 
  but 
  not 
  eating 
  through 
  the 
  leaf. 
  There 
  

   are 
  two 
  broods 
  of 
  beetles 
  in 
  a 
  year, 
  one 
  appearing 
  in 
  August 
  and 
  the 
  

   other 
  in 
  the 
  fall. 
  This 
  beetle 
  is 
  little 
  likely 
  to 
  injure 
  beets 
  if 
  its 
  usual 
  

   food 
  plants 
  are 
  suppressed 
  in 
  the 
  field. 
  

  

  The 
  Grape-vine 
  Colaspis. 
  

  

  Colaspis 
  brunnea 
  Fabr. 
  

  

  (PI. 
  IX., 
  Fig. 
  I.) 
  

  

  This 
  common 
  beetle, 
  ranging 
  from 
  Nebraska 
  to 
  the 
  Atlantic 
  States 
  

   and 
  Canada, 
  has 
  frequently 
  been 
  taken 
  on 
  the 
  sugar 
  beet 
  in 
  Nebraska 
  

   and 
  Illinois. 
  It 
  is 
  a 
  very 
  general 
  feeder 
  in 
  the 
  beetle 
  stage, 
  injuring 
  

   grape, 
  strawberry, 
  beans, 
  buckwheat, 
  corn-silk, 
  clover, 
  willow 
  blossoms, 
  

   and 
  the 
  leaves 
  and 
  blossoms 
  of 
  many 
  other 
  plants. 
  It 
  is 
  said 
  to 
  begin 
  

   its 
  injury 
  by 
  making 
  a 
  small 
  round 
  hole, 
  which 
  it 
  enlarges 
  until, 
  perhaps, 
  

   the 
  entire 
  leaf 
  is 
  eaten. 
  The 
  larva 
  — 
  a 
  whitish 
  cylindrical 
  grub 
  an 
  eighth 
  

   of 
  an 
  inch 
  in 
  length 
  and 
  with 
  a 
  yellowish 
  brown 
  head 
  — 
  has 
  been 
  found 
  

   feeding 
  upon 
  the 
  roots 
  of 
  timothy 
  and 
  Indian 
  corn 
  in 
  central 
  Illinois, 
  

   and 
  is 
  also 
  widely 
  known 
  as 
  a 
  strawberry 
  root-worm. 
  It 
  appears 
  to 
  be 
  

   primarily 
  a 
  grass-root 
  insect 
  in 
  the 
  larval 
  stage, 
  attacking 
  other 
  crops 
  

   when 
  these 
  are 
  substituted 
  for 
  grass 
  on 
  infested 
  land. 
  It 
  lives 
  as 
  a 
  

   beetle 
  during 
  the 
  summer 
  months, 
  ranging 
  in 
  our 
  collections 
  from 
  June 
  

   22d 
  to 
  September 
  14th, 
  but 
  being 
  most 
  

   abundant 
  in 
  July 
  and 
  August. 
  We 
  have 
  not 
  

   found 
  it 
  at 
  all 
  in 
  winter 
  even 
  in 
  strawberry 
  

   beds 
  where 
  it 
  had 
  been 
  previously 
  abundant. 
  

   The 
  eggs 
  are 
  doubtless 
  laid 
  in 
  summer 
  and 
  

   fall, 
  and 
  the 
  time 
  at 
  which 
  injury 
  to 
  corn 
  

   begins 
  indicates 
  the 
  presence 
  of 
  the 
  larvae 
  in 
  

   the 
  ground 
  quite 
  early 
  in 
  May. 
  The 
  species 
  

   is 
  evidently 
  single-brooded, 
  and 
  probably 
  

   hibernates 
  as 
  a 
  larva 
  partly 
  grown. 
  J 
  M 
  

  

  The 
  Southern 
  Corn 
  Root 
  Worm. 
  

  

  Diabrotica 
  12-punctaia 
  Oliv. 
  

  

  This 
  notorious 
  pest 
  includes 
  the 
  sugar 
  

   beet 
  in 
  its 
  large 
  dietary, 
  which 
  contains 
  also 
  

   leaves, 
  silk 
  and 
  pollen, 
  and 
  unripe 
  kernels 
  of 
  Fig. 
  45. 
  The 
  Southern 
  Com 
  Root 
  

   corn; 
  unripe 
  grains 
  of 
  wheat; 
  petals 
  of 
  various 
  ^°'''"' 
  ^'^^^"'''^'^ 
  12-punciata. 
  adult. 
  

  

  