﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  549 
  

  

  the 
  base 
  of 
  each 
  of 
  the 
  lateral 
  filaments 
  of 
  the 
  tenth 
  abdominal 
  segment 
  

   on 
  its 
  inner 
  side. 
  Other 
  characters 
  as 
  given 
  in 
  the 
  table 
  for 
  larvae 
  

   above. 
  

  

  Chauliodes 
  serricornis 
  Say 
  

  

  Saw-horned 
  fish 
  fly 
  

  

  Plate 
  27 
  

   1821 
  Chauliodes 
  serricornis 
  Say, 
  Acad. 
  nat. 
  sci. 
  Phil. 
  Jour. 
  v. 
  2, 
  appen- 
  

   dix 
  p. 
  307 
  

   1839 
  Chauliodes 
  serricornis 
  Burmeister, 
  Haudb. 
  ent. 
  2:949 
  

   1842 
  Neuromus 
  maculatus 
  Rambur, 
  Ins. 
  Neur. 
  p. 
  442, 
  pi. 
  10, 
  fig. 
  2 
  

   1853 
  Neuromus 
  maculatns 
  Walker, 
  -Cat. 
  Neur. 
  ins. 
  Brit. 
  mus. 
  3:202 
  

   1861 
  Chauliodes 
  maculatus 
  Hagen, 
  Synopsis 
  Neur. 
  N. 
  Am. 
  p. 
  190 
  

   1863 
  C 
  hauliodes 
  serricornis 
  Walsb, 
  (Corrects 
  Hagen's 
  names) 
  Ent. 
  

   80C. 
  Phil. 
  Proc. 
  2 
  : 
  262 
  

  

  1892 
  Chau 
  Hod 
  68 
  serricornis 
  Banks, 
  Am. 
  ent. 
  soc. 
  19 
  : 
  357 
  (listed) 
  

  

  1893 
  Chauliodes 
  serricornis 
  Lintner, 
  N. 
  Y. 
  state 
  ent. 
  8th 
  an. 
  rep't, 
  

  

  p. 
  157 
  (notes 
  on 
  its 
  occurrence 
  in 
  New 
  York 
  state, 
  with 
  original 
  figure 
  ; 
  

   larva 
  described 
  and 
  figured 
  as 
  Ch. 
  pectinicoruis?) 
  

  

  This 
  species 
  was 
  very 
  common 
  on 
  Little 
  Clear 
  creek 
  between 
  the 
  

   hatchery 
  and 
  the 
  railroad. 
  Half 
  a 
  dozen 
  specimens 
  could 
  be 
  picked 
  

   from 
  the 
  sedges 
  and 
  flowering 
  ferns 
  in 
  walking 
  across 
  this 
  short 
  open 
  

   space 
  any 
  day 
  in 
  July. 
  When 
  resdng 
  on 
  the 
  under 
  side 
  of 
  the 
  leaves 
  of 
  

   the 
  flowering 
  fern, 
  Osmunda 
  regalis 
  Linn,, 
  they 
  were 
  not 
  easily 
  dis- 
  

   turbed 
  ; 
  several 
  were 
  carried 
  into 
  the 
  hatchery 
  on 
  a 
  fern 
  spray. 
  A 
  pair 
  

   found 
  in 
  copulo 
  was 
  thus 
  carried 
  in 
  and 
  photographed 
  (pi, 
  27); 
  these 
  

   pictures 
  show 
  the 
  singular 
  position 
  assumed 
  by 
  the 
  male 
  in 
  copulation. 
  

   In 
  this 
  case, 
  though 
  not 
  in 
  any 
  other 
  of 
  the 
  many 
  observed, 
  the 
  female 
  

   had 
  apparently 
  already 
  deposited 
  a 
  large 
  number 
  of 
  eggs. 
  Shortly 
  after 
  

   photographs 
  a 
  and 
  b 
  of 
  the 
  plate 
  were 
  taken 
  the 
  male 
  departed, 
  and 
  the 
  

   female 
  resumed 
  ovipositing. 
  She 
  added 
  eggs 
  at 
  first 
  in 
  regular 
  series, 
  

   following 
  the 
  fines 
  of 
  the 
  cluster 
  already 
  laid 
  down; 
  finally 
  depositing 
  a 
  

   partial 
  second 
  layer 
  in 
  less 
  regular 
  order 
  on 
  the 
  top 
  of 
  the 
  first. 
  While 
  

   thus 
  at 
  work, 
  the 
  photograph 
  reproduced 
  as 
  fig. 
  <: 
  of 
  the 
  plate 
  was 
  taken. 
  

  

  A 
  large 
  number 
  of 
  egg 
  clusters 
  were 
  seen, 
  all 
  of 
  them 
  on 
  the 
  under 
  

  

  side 
  of 
  leaves 
  of 
  the 
  above 
  mentioned 
  fern. 
  In 
  the 
  cluster 
  shown 
  in 
  these 
  

  

  figures 
  there 
  were 
  about 
  900 
  eggs. 
  Some 
  larger 
  clusters 
  were 
  seen 
  ; 
  many 
  

  

  of 
  them 
  were 
  smaller. 
  These 
  eggs 
  hatched 
  in 
  17 
  days. 
  There 
  appears 
  to 
  

  

  be 
  great 
  uniformity 
  in 
  incubation 
  period 
  with 
  eggs 
  of 
  the 
  same 
  cluster. 
  

  

  Numerous 
  clusters 
  were 
  picked 
  with 
  the 
  eggs 
  all 
  hatching 
  at 
  once, 
  heads 
  

  

  protruding, 
  and 
  jaws 
  widely 
  swung 
  open, 
  a 
  most 
  curious 
  sight, 
  a 
  veritable 
  

  

  cheval 
  de 
  frise 
  of 
  great 
  rapacious 
  mandibles. 
  

  

  The 
  newly 
  hatched 
  larva 
  of 
  Ch. 
  serricornis 
  is 
  3 
  mm 
  long, 
  and 
  

   has 
  much 
  the 
  same 
  aspect 
  as 
  older 
  larvae 
  of 
  the 
  genus 
  have. 
  The 
  head 
  

  

  