﻿334 
  Mr. 
  F. 
  Enock's 
  Ufe-historij 
  of 
  

  

  in 
  the 
  right 
  direction 
  on 
  its 
  journey 
  downwards, 
  and, 
  

   guided 
  by 
  the 
  longitudinal 
  stripe 
  of 
  the 
  leaves, 
  it 
  reaches 
  

   the 
  stem, 
  round 
  which 
  the 
  leaf-sheath 
  is 
  closely 
  wrapped, 
  

   but 
  not 
  too 
  close 
  to 
  prevent 
  the 
  larva 
  forcing 
  its 
  way 
  ; 
  

   until, 
  after 
  some 
  four 
  hours' 
  steady 
  travelling 
  (during 
  

   which 
  time 
  it 
  has 
  covered 
  only 
  the 
  small 
  distance 
  of 
  two 
  

   or 
  three 
  inches), 
  it 
  reaches 
  the 
  base 
  of 
  the 
  sheath, 
  

   generally 
  of 
  the 
  second 
  joint 
  above 
  ground 
  ; 
  here 
  its 
  

   further 
  progress 
  is 
  blocked, 
  and 
  it 
  turns 
  half 
  round, 
  so 
  

   that 
  its 
  ventral 
  surface 
  is 
  in 
  contact 
  with 
  the 
  stem, 
  the 
  

   head 
  still 
  downwards. 
  

  

  As 
  idleness 
  in 
  insects 
  is 
  a 
  characteristic 
  noticeable 
  by 
  

   its 
  absence, 
  the 
  tiny 
  larva 
  commences 
  to 
  injure 
  the 
  

   plant 
  by 
  bringing 
  its 
  head 
  and 
  mouth 
  up 
  to 
  the 
  soft 
  

   stem, 
  imbibing 
  the 
  life-juice 
  for 
  its 
  maintenance, 
  but 
  

   very 
  much 
  to 
  the 
  detriment 
  of 
  the 
  barley. 
  The 
  larva 
  

   increases 
  in 
  width 
  even 
  before 
  it 
  disappears 
  out 
  of 
  sight, 
  

   leading 
  one 
  to 
  suppose 
  that 
  it 
  imbibes 
  moisture 
  as 
  it 
  

   journeys 
  down 
  the 
  furrows 
  of 
  the 
  leaf; 
  that 
  the 
  larva 
  is 
  

   capable 
  of 
  taking 
  fluid 
  nourishment 
  I 
  have 
  proved 
  by 
  

   feeding 
  and 
  fattening 
  a 
  number 
  of 
  them 
  which 
  emerged 
  

   in 
  a 
  glass 
  phial, 
  Aug. 
  7th, 
  1888, 
  into 
  which, 
  attached 
  to 
  

   the 
  cork, 
  I 
  put 
  a 
  strip 
  of 
  white 
  blotting-paper, 
  which 
  I 
  

   had 
  moistened 
  by 
  dipping 
  into 
  a 
  very 
  weak 
  solution 
  of 
  

   starch-water 
  ; 
  the 
  damp 
  paper 
  clung 
  to 
  the 
  sides 
  of 
  the 
  

   phial, 
  and 
  between 
  the 
  paper 
  and 
  glass 
  a 
  number 
  of 
  the 
  

   young 
  larvae 
  crawled, 
  and 
  lived 
  upon 
  the 
  starch-water 
  

   for 
  more 
  than 
  a 
  week. 
  I 
  am 
  afraid, 
  when 
  withdrawing 
  

   the 
  cork 
  to 
  replenish 
  the 
  blotting-paper 
  with 
  starch- 
  

   water, 
  the 
  larvae 
  received 
  some 
  injury, 
  for 
  all 
  were 
  dead 
  

   on 
  the 
  eighth 
  day. 
  I 
  frequently 
  observed 
  that 
  when 
  an 
  

   impregnated 
  female 
  was 
  put 
  under 
  a 
  cylinder 
  enclosing 
  

   growing 
  barley 
  she 
  showed 
  considerable 
  excitement, 
  and 
  

   was 
  careless 
  as 
  to 
  where 
  she 
  laid 
  her 
  eggs 
  ; 
  sometimes 
  

   settling 
  on 
  a 
  leaf 
  bent 
  down, 
  laying 
  her 
  eggs 
  the 
  wrong 
  

   way, 
  with 
  the 
  heads 
  towards 
  the 
  tip 
  of 
  the 
  leaf. 
  

  

  I 
  watched 
  the 
  eggs 
  very 
  closely 
  on 
  the 
  fourth 
  day, 
  and 
  

   was 
  fortunate 
  in 
  seeing 
  some 
  hatch. 
  The 
  larvae 
  worked 
  

   their 
  way 
  to 
  the 
  tip 
  of 
  the 
  leaf, 
  where 
  some 
  of 
  them 
  

   managed 
  to 
  cross 
  the 
  edge 
  and 
  get 
  on 
  to 
  the 
  back 
  or 
  

   under 
  side, 
  and 
  commenced 
  their 
  tremendous 
  journey 
  of 
  

   four 
  to 
  six 
  inches 
  ! 
  some 
  arriving 
  at 
  their 
  destination 
  at 
  

   the 
  next 
  joint 
  hdow 
  the 
  one 
  they 
  would 
  have 
  occupied 
  

   had 
  the 
  female 
  laid 
  her 
  eggs 
  on 
  the 
  inside 
  of 
  the 
  upright 
  

  

  