﻿398 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  plate 
  5. 
  On 
  the 
  sandy 
  bottoms 
  of 
  these 
  quiet 
  waters 
  it 
  was 
  specially 
  

   advantageous. 
  Extensive 
  use 
  was 
  made 
  of 
  white 
  wash 
  bowls, 
  soup 
  

   plates 
  and 
  saucers 
  in 
  the 
  examination 
  of 
  our 
  catch. 
  We 
  habitually 
  

   placed 
  teneral 
  specimens 
  of 
  most 
  orders, 
  when 
  found 
  in 
  the 
  cages 
  newly 
  

   transformed, 
  in 
  paper 
  bags 
  to 
  await 
  the 
  maturing 
  of 
  their 
  colors. 
  

  

  For 
  rearing 
  purposes, 
  the 
  screen 
  cage, 
  a 
  simple 
  cylinder 
  of 
  wire 
  screen 
  

   with 
  a 
  loose 
  cover 
  (described 
  on 
  page 
  7 
  of 
  the 
  above 
  mentioned 
  bulletin 
  

   and 
  shown 
  in 
  operation 
  in 
  plate 
  5) 
  was 
  most 
  useful. 
  The 
  larger 
  cages 
  of 
  

   this 
  sort 
  were 
  set 
  down 
  in 
  the 
  sand 
  of 
  the 
  bottom 
  of 
  the 
  creek 
  ; 
  smaller 
  

   ones 
  were 
  set 
  in 
  the 
  hatchery 
  troughs. 
  These, 
  of 
  course, 
  needed 
  a 
  bot- 
  

   tom, 
  which 
  was 
  supplied 
  by 
  inserting 
  a 
  piece 
  of 
  cloth 
  laid 
  over 
  an 
  open 
  

   loop 
  of 
  spring 
  wire; 
  the 
  wire 
  when 
  released 
  holding 
  the 
  cloth 
  tightly 
  

   against 
  the 
  sides 
  of 
  the 
  cage. 
  A 
  still 
  farther 
  modification 
  of 
  this 
  cage 
  

   consisted 
  in 
  making 
  it 
  smaller, 
  and 
  of 
  fine 
  brass 
  screen, 
  and 
  attaching 
  

   cork 
  to 
  its 
  sides 
  to 
  float 
  it. 
  Mr 
  Betten 
  made 
  a 
  very 
  good 
  egg-hatching^ 
  

   cage 
  out 
  of 
  it 
  by 
  sealing 
  a 
  watch 
  glass 
  in 
  the 
  bottom 
  of 
  it 
  with 
  paraffin, 
  

   and 
  attaching 
  the 
  cork 
  floats. 
  The 
  eggs 
  were 
  thus 
  kept 
  in 
  flowing 
  water, 
  

   but 
  could 
  be 
  at 
  once 
  removed 
  to 
  the 
  stage 
  of 
  the 
  microscope 
  without 
  

   disturbance. 
  

  

  I 
  devised 
  for 
  our 
  work 
  at 
  Saranac 
  Inn 
  another 
  type 
  of 
  floating 
  cage 
  

   that 
  proved 
  so 
  generally 
  useful 
  for 
  minute 
  insects, 
  and 
  was 
  so 
  easily 
  and 
  

  

  rapidly 
  constructed 
  that 
  it 
  may 
  be 
  

   worth 
  while 
  to 
  give 
  a 
  description 
  of 
  it. 
  

   The 
  accompanying 
  figure 
  shows 
  its 
  

   construction 
  in 
  the 
  main. 
  With 
  the 
  

   five 
  little 
  pieces 
  of 
  wood 
  (which 
  

  

  Plg.l 
  Floating 
  cage, 
  designed 
  for 
  rearing 
  ^hould 
  be 
  CUt 
  from 
  dry 
  pine) 
  at 
  hand,. 
  

  

  a 
  cage 
  of 
  this 
  sort 
  can 
  be 
  put 
  up 
  and 
  

   The 
  cloth 
  is 
  attached 
  to 
  the 
  wood 
  by 
  

   means 
  of 
  paraflin, 
  which 
  is 
  melted 
  and 
  applied 
  with 
  a 
  brush. 
  The 
  loose- 
  

   end 
  of 
  the 
  cloth 
  is 
  attached, 
  and 
  the 
  door 
  closed 
  by 
  

   means 
  of 
  a 
  rubber 
  band 
  stretched 
  between 
  two 
  

   tack 
  heads 
  over 
  the 
  convex 
  upper 
  edge 
  of 
  one 
  of 
  » 
  j 
  

   the 
  wooden 
  side 
  strips 
  (fig. 
  i). 
  This 
  sort 
  of 
  cage 
  if 
  

   was 
  most 
  successful 
  with 
  small 
  Diptera, 
  but 
  not 
  *^ 
  

   with 
  small 
  May 
  flies, 
  such 
  as 
  Caenis; 
  for 
  these 
  whSh^tn 
  ^bTufef 
  succeT 
  

   would 
  invariably 
  fall 
  into 
  the 
  water 
  and 
  die 
  at 
  nve^ 
  °i"^tta"nding^^wate^! 
  

  

  Wooden 
  kit 
  with 
  covering- 
  

  

  once 
  on 
  transformation. 
  of 
  netting 
  tied 
  on 
  

  

  The 
  trap 
  lanterns 
  we 
  used 
  (pi. 
  4, 
  5) 
  were 
  also 
  very 
  simply 
  constructed. 
  

   The 
  idea 
  of 
  them, 
  however, 
  was 
  borrowed 
  from 
  some 
  lanterns 
  I 
  found 
  my 
  

  

  small 
  Diptera 
  

  

  ready 
  for 
  use 
  in 
  10 
  minutes. 
  

  

  