﻿88 
  

  

  -of 
  water, 
  tlic 
  tomp(M'ature 
  of 
  which 
  varied 
  from 
  64.4' 
  to 
  78.8' 
  Fahr., 
  

   and 
  kept 
  immersed 
  for 
  periods 
  varying 
  from 
  three 
  hours 
  to 
  sixteen 
  

   and 
  a 
  fourth 
  days. 
  An 
  additional 
  lot 
  of 
  a 
  dozen 
  was 
  placed 
  on 
  blot- 
  

   ting 
  paper 
  on 
  damp 
  earth 
  in 
  a 
  similar 
  vessel 
  as 
  a 
  check. 
  The 
  periods 
  

   of 
  exposure 
  and 
  the 
  number 
  hatching 
  out 
  of 
  each 
  lot 
  are 
  as 
  fol- 
  

   lows: 
  

  

  In 
  the 
  check 
  lot. 
  ten 
  eggs 
  Iiatched 
  out 
  of 
  the 
  twelve 
  set 
  aside. 
  

  

  From 
  the 
  above 
  experiment 
  it 
  follows 
  that 
  submersion 
  in 
  water 
  at 
  

   usual 
  temperatures 
  does 
  not 
  affect 
  the 
  hatciiingof 
  chinch-bugs' 
  eggs, 
  

   the 
  last 
  lot 
  mentioned 
  having 
  been 
  kept 
  under 
  w^ater 
  during 
  the 
  en- 
  

   tire 
  period 
  of 
  development, 
  and 
  hatching 
  without 
  the 
  loss 
  of 
  an 
  egg. 
  

  

  These 
  results 
  were 
  confirmed 
  by 
  another 
  experiment, 
  begun 
  Au- 
  

   gust 
  20, 
  in 
  which 
  two 
  lots 
  each 
  of 
  six 
  recently 
  deposited 
  eggs 
  were 
  

   placed 
  in 
  small 
  glass 
  dishes, 
  one 
  lot 
  being 
  kept 
  continually 
  immersed 
  

   in 
  rain 
  water 
  and 
  the 
  other 
  being 
  placed 
  on 
  damp 
  blotting 
  paper 
  on 
  

   damp 
  earth 
  and 
  kept 
  barely 
  moist. 
  In 
  both 
  cases 
  all 
  the 
  eggs 
  hatched 
  

   and 
  at 
  about 
  the 
  same 
  rate, 
  the 
  first 
  young 
  appearing 
  in 
  the 
  experi- 
  

   mental 
  lot 
  September 
  4 
  and 
  in 
  the 
  check 
  lot 
  September 
  3, 
  the 
  last 
  

   egg 
  hatching 
  in 
  the 
  experimental 
  lot 
  September 
  5 
  and 
  in 
  thecheck 
  Sep- 
  

   tember 
  4. 
  The 
  temperature 
  of 
  the 
  water 
  varied 
  from 
  71" 
  to 
  83° 
  Fahr. 
  

   All 
  the 
  young 
  emerging 
  from 
  the 
  eggs 
  under 
  water 
  would 
  apparently 
  

   have 
  drowned 
  if 
  they 
  had 
  not 
  been 
  carefully 
  removed, 
  and 
  two 
  of 
  

   those 
  rescued 
  did 
  not 
  revive. 
  The 
  young 
  in 
  the 
  check 
  all 
  survived 
  

   and 
  began 
  to 
  feed. 
  

  

  Eff'c'ci 
  of 
  Moist 
  Ah)iosp)icre 
  on 
  Hatching 
  of 
  Cliincli-hugs' 
  EygS' 
  

   — 
  May 
  9 
  a 
  large 
  number 
  of 
  eggs 
  were 
  jjlaced 
  upon 
  blotting 
  paper 
  

   thoroughly 
  soaked 
  in 
  water 
  on 
  a 
  layer 
  of 
  damp 
  sand 
  in 
  a 
  covered 
  

   glass 
  dish, 
  and 
  kept 
  under 
  daily 
  observation 
  until 
  June 
  6. 
  Water 
  

   was 
  added 
  as 
  required 
  to 
  keep 
  the 
  contained 
  atmosphere 
  saturated, 
  

   with 
  the 
  exception 
  of 
  a 
  single 
  day 
  (May 
  2G), 
  when 
  the 
  contents 
  of 
  

   the 
  dish 
  bscame 
  rather 
  dry. 
  Beginning 
  development 
  of 
  eggs 
  was 
  

   evident 
  by 
  May 
  17, 
  a 
  change 
  of 
  color 
  being 
  especially 
  conspicuous 
  

   at 
  the 
  ends 
  of 
  the 
  eggs. 
  Molds 
  of 
  various 
  sorts 
  began 
  to 
  form 
  upon 
  

   the 
  paper 
  ami 
  to 
  run 
  over 
  the 
  eggs 
  as 
  early 
  as 
  the 
  18th. 
  but 
  with 
  no 
  

   apparent 
  effect 
  upon 
  their 
  development. 
  Hatching 
  began 
  May 
  30, 
  

   when 
  fragments 
  of 
  wheat 
  leaves 
  were 
  placed 
  in 
  the 
  Petri 
  dish 
  as 
  

   food 
  for 
  the 
  young 
  and 
  as 
  a 
  means 
  of 
  escape 
  from 
  the 
  supersaturated 
  

   sand 
  and 
  paper. 
  The 
  bugs 
  began 
  to 
  die 
  at 
  once 
  in 
  small 
  numbers, 
  

   appart'utly 
  from 
  drowning, 
  as 
  microscopic 
  examinations 
  of 
  crushed 
  

   spi^cimens 
  gave 
  no 
  evid.'iice 
  of 
  bacterial 
  or 
  other 
  fungous 
  infection, 
  

  

  