﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  545 
  

  

  segments, 
  situated 
  just 
  above 
  the 
  bases 
  of 
  the 
  lateral 
  filaments. 
  The 
  

   pair 
  on 
  the 
  eighth 
  segment 
  is 
  more 
  or 
  less 
  elevated 
  above 
  the 
  surface 
  of 
  

   the 
  segment, 
  being 
  more 
  or 
  less 
  extended 
  in 
  flexuous 
  respiratory 
  tubes. 
  

   These 
  tubes 
  may 
  reach 
  a 
  length 
  exceeding 
  that 
  of 
  the 
  lateral 
  filaments. 
  

   They 
  enable 
  the 
  larva 
  to 
  remain 
  below 
  while 
  taking 
  air 
  at 
  the 
  surface 
  of 
  

   the 
  water. 
  

  

  The 
  genus 
  is 
  semiaquatic. 
  

  

  The 
  full 
  grown 
  larva 
  finds 
  a 
  place 
  above 
  the 
  level 
  of 
  the 
  water 
  under 
  a 
  

   stone 
  or 
  log 
  or 
  layer 
  of 
  moss 
  or 
  in 
  a 
  rotten 
  log 
  and 
  excavates 
  a 
  cell 
  in 
  

   moist 
  soil 
  or 
  in 
  rotten 
  wood, 
  in 
  which 
  without 
  spinning 
  a 
  cocoon 
  it 
  

   enters 
  on 
  a 
  pupal 
  period 
  of 
  about 
  two 
  weeks' 
  duration. 
  

  

  Three 
  species 
  of 
  Chauliodes 
  larvae 
  were 
  taken 
  in 
  the 
  edges 
  of 
  

   Little 
  Clear 
  pond 
  and 
  creek. 
  None 
  of 
  them 
  were 
  raised. 
  Oneofthein 
  

   agrees 
  with 
  the 
  larva 
  figured 
  asCh. 
  pectinicornis^ 
  t)yj. 
  Bridgham 
  

   in 
  Dr 
  Lintner's 
  eighth 
  report 
  as 
  entomologist 
  of 
  the 
  state 
  of 
  New 
  York 
  

   (1893. 
  pi. 
  i). 
  Another 
  is 
  distinguished 
  by 
  its 
  size: 
  it 
  is 
  too 
  large 
  to 
  be 
  

   the 
  larva 
  of 
  any 
  known 
  New 
  York 
  species 
  save 
  Cb. 
  pectinicornis. 
  

   The 
  third 
  one 
  should 
  belong 
  to 
  Ch. 
  r 
  astri 
  cor 
  nis 
  ,^ 
  and 
  probably 
  it 
  

   does 
  ; 
  for 
  it 
  agrees 
  with 
  the 
  larva 
  of 
  that 
  species 
  as 
  figured 
  by 
  Prof. 
  

   Weed, 
  and 
  copied 
  in 
  the 
  above 
  mentioned 
  report 
  of 
  Dr 
  Lintner. 
  Since 
  

   no 
  specific 
  differences 
  m 
  habits 
  were 
  noted 
  for 
  these 
  larvae 
  save 
  that 
  the 
  

   one 
  referred 
  toCh. 
  pectinicornis 
  was 
  less 
  aquatic, 
  and 
  since 
  they 
  

   can 
  not 
  be 
  referred 
  to 
  the 
  species 
  discussed 
  below 
  with 
  positive 
  certainty, 
  

   the 
  structural 
  differences 
  between 
  them 
  may 
  as 
  well 
  be 
  briefly 
  indicated 
  

   here. 
  

  

  a 
  The 
  spiracles 
  of 
  the 
  eighth 
  abdoirjiual 
  segment 
  widely 
  separated, 
  their 
  

   miirgins 
  eleviited 
  but 
  slightly 
  above 
  the 
  level 
  of 
  the 
  segmeut 
  

  

  Ch. 
  pectiDicornis, 
  supposition 
  

  

  aa 
  Spiracles 
  of 
  the 
  eighth 
  abdominal 
  segment 
  approximated 
  and 
  drawu 
  out 
  into 
  

  

  a 
  ])air 
  of 
  long, 
  flexuous, 
  contractile 
  respiratory 
  tubes 
  which 
  surpass 
  the 
  

  

  til) 
  of 
  the 
  abdomen 
  

  

  h 
  Respiratory 
  tubes 
  conspicuously 
  unequal 
  in 
  length; 
  the 
  10th 
  abdominal 
  

  

  segmeut 
  including 
  its 
  claws 
  two 
  and 
  a 
  half 
  times 
  the 
  length 
  of 
  the 
  

  

  ninth 
  ; 
  the 
  lateral 
  filament 
  of 
  the 
  10th 
  segment 
  surpassing 
  the 
  tips 
  of 
  

  

  the 
  claws 
  by 
  more 
  than 
  the 
  length 
  of 
  the 
  claws 
  

  

  Ch. 
  serricornis, 
  supposition 
  

  

  Ih 
  Respiratory 
  tubes 
  about 
  equal 
  in 
  length 
  ; 
  the 
  10th 
  abdominal 
  segment 
  

  

  with 
  its 
  claws 
  one 
  and 
  a 
  half 
  times 
  the 
  length 
  of 
  the 
  ninth; 
  the 
  lateral 
  

  

  filameut 
  of 
  the 
  10th 
  segment 
  surpassing 
  the 
  tips 
  of 
  the 
  claws 
  by 
  less 
  

  

  than 
  the 
  length 
  of 
  the 
  claws 
  Ch. 
  rastricor 
  nis, 
  supposition 
  

  

  1 
  This, 
  I 
  take 
  it, 
  was 
  a 
  case 
  of 
  mistaken 
  determination. 
  Ttie 
  iarva 
  was 
  not 
  reared 
  ; 
  it 
  is 
  too 
  

   small 
  to 
  belong 
  to 
  pectinicornis; 
  It 
  is 
  like 
  larvae 
  of 
  Ch. 
  serricornis, 
  bred 
  by 
  Mr 
  Hen 
  - 
  

   shaw 
  and 
  in 
  the 
  Museum 
  of 
  comparative 
  zoology. 
  I 
  therefore 
  refer 
  it 
  to 
  that 
  species, 
  

  

  2 
  0hioagrlc. 
  exp. 
  sta. 
  Tech. 
  ser. 
  Bui. 
  1889. 
  1:7-10, 
  pi. 
  1, 
  fig. 
  3. 
  

  

  