﻿112 
  

  

  A. 
  W. 
  BACOT 
  — 
  THE 
  INFLUENCE 
  OP 
  TEMPERATURE, 
  

  

  Record 
  of 
  Eggs 
  Laid 
  and 
  Nature 
  of 
  Experiments 
  for 
  which 
  the 
  various 
  

  

  Batches 
  were 
  used. 
  

  

  

  

  

  

  Numbers 
  of 
  

  

  

  

  

  Desig 
  

   natioi 
  

  

  of 
  

   Batch 
  

  

  Number 
  

   1 
  of 
  

   Eggs 
  in 
  

   Batch. 
  

  

  Dates 
  between 
  

   which 
  the 
  various 
  

   Batches 
  were 
  laid. 
  

  

  Numbers 
  

  

  of 
  

   Control 
  

   Speci- 
  

  

  Specimens 
  

  

  used 
  in 
  

  

  Experiments. 
  

  

  

  Submergence 
  in 
  

  

  1 
  

  

  

  

  

  

  

  

  mens. 
  

  

  Cold. 
  

  

  Heat. 
  

  

  Water. 
  

  

  Wet 
  

   Sand. 
  

  

  Dry 
  

   Sand. 
  

  

  Lime 
  

   Water. 
  

  

  a 
  

  

  .. 
  • 
  90 
  

  

  15-21 
  Nov. 
  '13 
  

  

  

  45 
  

  

  45 
  

  

  

  

  

  

  b 
  

  

  75 
  

  

  21-23 
  „ 
  

  

  — 
  

  

  37 
  

  

  38 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  

  

  c 
  

  

  . 
  61 
  

  

  23-27 
  

  

  25 
  

  

  — 
  

  

  — 
  

  

  11 
  

  

  25 
  

  

  — 
  

  

  

  

  d 
  

  

  87 
  

  

  27 
  Nov.-l 
  Dec. 
  '13 
  

  

  29 
  

  

  — 
  

  

  — 
  

  

  

  

  — 
  

  

  58 
  

  

  

  

  e 
  

  

  45 
  

  

  1-4 
  Dec. 
  '13 
  

  

  15 
  

  

  — 
  

  

  — 
  

  

  30 
  

  

  

  

  — 
  

  

  

  

  f 
  

  

  93 
  

  

  4-9 
  „ 
  

  

  15 
  

  

  28 
  

  

  50 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  9 
  

  

  33 
  

  

  9-15 
  

  

  13 
  

  

  20 
  

  

  — 
  

  

  — 
  

  

  . 
  — 
  

  

  — 
  

  

  — 
  

  

  h 
  

  

  18 
  

  

  24-25 
  March 
  '13 
  . 
  . 
  

  

  4 
  

  

  14 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  i 
  

  

  18 
  

  

  25-26 
  „ 
  

  

  2 
  

  

  16 
  

  

  

  

  

  

  

  3 
  

  

  16 
  

  

  26-27 
  „ 
  

  

  5 
  

  

  — 
  

  

  — 
  

  

  11 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  k 
  

  

  75 
  

  

  27-30 
  „ 
  

  

  10 
  

  

  46 
  

  

  — 
  

  

  19 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  I 
  

  

  32 
  

  

  30-31 
  „ 
  

  

  12 
  

  

  — 
  

  

  — 
  

  

  20 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  m 
  

  

  54 
  

  

  31 
  Mar.-2 
  Apr. 
  '14 
  

  

  20 
  

  

  — 
  

  

  — 
  

  

  

  34 
  

  

  — 
  

  

  — 
  

  

  n 
  

  

  17 
  

  

  2-3 
  April 
  '14 
  

  

  6 
  

  

  — 
  

  

  — 
  

  

  11 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  o 
  

  

  70 
  

  

  3-6 
  

  

  11 
  

  

  41 
  

  

  — 
  

  

  18 
  

  

  — 
  - 
  

  

  — 
  

  

  — 
  

  

  P 
  

  

  25 
  

  

  6-7 
  

  

  8 
  

  

  — 
  

  

  — 
  

  

  17 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  9 
  

  

  73 
  

  

  7-10 
  „ 
  

  

  13 
  

  

  60 
  

  

  

  

  

  

  

  r 
  

  

  50 
  

  

  1-6 
  May 
  '14 
  

  

  19 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  — 
  

  

  31 
  

  

  Temperature 
  experiments. 
  — 
  Ova 
  laid 
  on 
  cloth 
  were 
  enclosed 
  in 
  an 
  entomological 
  

   box 
  (of 
  card 
  with, 
  a 
  glass 
  bottom), 
  and 
  this 
  was 
  nested 
  in 
  one 
  of 
  a 
  larger 
  size 
  to 
  avoid 
  

   any 
  possibility 
  of 
  escape. 
  In 
  cases 
  where 
  eggs 
  laid 
  on 
  the 
  sides 
  of 
  the 
  card 
  box 
  were 
  

   used, 
  this 
  box 
  was 
  enclosed 
  in 
  a 
  larger 
  one. 
  

  

  Submersion 
  experiments. 
  — 
  Pieces 
  of 
  cloth 
  on 
  which 
  the 
  eggs 
  were 
  laid 
  were 
  fastened 
  

   by 
  one 
  corner 
  at 
  the 
  bottom 
  of 
  a 
  waxed 
  card 
  jar 
  and 
  water 
  was 
  then 
  poured 
  in 
  until 
  

   the 
  eggs 
  were 
  three 
  or 
  four 
  inches 
  below 
  the 
  surface. 
  

  

  Burial 
  in 
  sand. 
  — 
  A 
  card 
  jar 
  was 
  half 
  filled 
  with 
  silver 
  sand, 
  the 
  cloth 
  with 
  eggs 
  

   attached 
  was 
  then 
  placed 
  on 
  the 
  surface 
  and 
  covered 
  with 
  sand 
  to 
  the 
  depth 
  of 
  at 
  

   least 
  one 
  inch. 
  For 
  the 
  wet 
  sand 
  tests 
  the 
  jar 
  was 
  flooded 
  with 
  water, 
  and 
  the 
  excess 
  

   poured 
  off. 
  After 
  the 
  period 
  of 
  test 
  the 
  cloth 
  was 
  removed 
  from 
  the 
  sand 
  and 
  placed 
  

   in 
  a 
  box 
  preparatory 
  to 
  hatching. 
  As 
  it 
  was 
  usually 
  found 
  that 
  a 
  few 
  of 
  the 
  eggs 
  

   became 
  detached, 
  the 
  sand 
  surrounding 
  the 
  cloth 
  which 
  contained 
  the 
  missing 
  eggs, 
  

   was 
  placed 
  in 
  a 
  second 
  box. 
  Washing 
  off 
  the 
  surface 
  on 
  which 
  they 
  had 
  been 
  laid 
  

   had 
  no 
  effect 
  on 
  the 
  eggs, 
  which 
  hatched 
  at 
  the 
  same 
  time 
  as 
  those 
  remaining 
  attached 
  

   to 
  the 
  cloth. 
  

  

  Plaster. 
  — 
  The 
  plaster 
  of 
  Paris 
  used 
  in 
  this 
  experiment 
  was 
  mixed 
  with 
  lime-water. 
  

   The 
  surface 
  was 
  made 
  very 
  wet, 
  so 
  that 
  the 
  eggs 
  might 
  become 
  partially 
  embedded. 
  

   They 
  were 
  scattered 
  over 
  the 
  wet 
  surface 
  and 
  became 
  too 
  firmly 
  attached 
  when 
  the 
  

   plaster 
  set 
  to 
  allow 
  of 
  removal 
  with 
  a 
  camel's 
  hair 
  brush. 
  

  

  Experiments 
  with 
  newly 
  hatched 
  bugs. 
  — 
  The 
  insects 
  used 
  in 
  these 
  experiments 
  were 
  

   taken 
  from 
  among 
  those 
  hatching 
  in 
  the 
  control 
  boxes 
  ; 
  they 
  were 
  not, 
  therefore, 
  

  

  