﻿542 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Hind 
  angles 
  of 
  the 
  head 
  rounded; 
  the 
  median 
  vein 
  two 
  branched 
  J 
  anten- 
  

   nae 
  with 
  segments 
  enlarged 
  distally 
  Chauliodes 
  

  

  bh 
  Hind 
  angles 
  of 
  the 
  head 
  hearing 
  a 
  sharp 
  angulation 
  or 
  tooth 
  ; 
  median 
  

   vein 
  three-branched; 
  segments 
  of 
  the 
  antenuae 
  cylindric 
  

  

  C 
  orydalis 
  

   Larvae 
  

  

  a 
  The 
  last 
  abdominal 
  segment 
  produced 
  in 
  a 
  long, 
  median, 
  laterally 
  fringed 
  

   tail 
  like 
  process 
  ; 
  a 
  pair 
  of 
  lateral 
  filaments 
  on 
  abdominal 
  segments 
  1-7 
  

  

  Stalls 
  

   aa 
  Last 
  abdominal 
  segment 
  bifurcated, 
  the 
  fleshy 
  forks 
  each 
  bearing 
  a 
  pair 
  of 
  

   hooks 
  and 
  a 
  minute, 
  external, 
  lateral 
  filament; 
  conspicuous 
  lateral 
  fila- 
  

   ments 
  on 
  abdominal 
  segments 
  1-8 
  

   & 
  Lateral 
  filaments 
  with 
  no 
  tuft 
  of 
  fine 
  tracheal 
  gills 
  at 
  their 
  bases 
  

  

  Chauliodes 
  

   hi) 
  Lateral 
  filaments 
  each 
  with 
  a 
  tuft 
  of 
  fine 
  tracheal 
  gills 
  at 
  its 
  base 
  

  

  C 
  cry 
  dalis 
  

  

  SIALIS 
  

  

  Alder 
  fly 
  '^ 
  : 
  orl 
  fly 
  

   A 
  single 
  species 
  of 
  this 
  genus 
  is 
  recorded 
  from 
  this 
  state. 
  

  

  Sialis 
  infumata 
  Newman 
  

   Smoky 
  orl 
  fly 
  

  

  Plate 
  29, 
  fig. 
  3 
  

   1838 
  Sialis 
  infumata 
  Newman, 
  Ent. 
  mag. 
  5 
  : 
  500 
  

   1853 
  Sialis 
  infumata 
  Walker, 
  Cat. 
  neur. 
  ins. 
  Brit. 
  mus. 
  3 
  : 
  195 
  

   1861 
  Sialis 
  infumata 
  Hagen, 
  Synopsis 
  Neur. 
  N. 
  Am. 
  p. 
  188 
  

   1863 
  Sialis 
  infumata 
  Hagen, 
  Ent. 
  soc. 
  Phil. 
  Proc. 
  2 
  : 
  180 
  

   1863 
  Sialis 
  infumata 
  Walsh, 
  Ent. 
  soc. 
  Phil. 
  Proc. 
  2 
  : 
  261-62 
  (figure 
  of 
  male 
  

  

  genitalia) 
  

   1892 
  Sialis 
  infumata 
  Banks, 
  Am. 
  ent. 
  soc. 
  Trans, 
  (listed) 
  

   1888 
  Sialis 
  infumata 
  Howard, 
  Insect 
  life, 
  1:99 
  (Sialis 
  larvae 
  in 
  pools 
  

  

  with 
  S 
  imuliu 
  m) 
  

  

  This 
  is 
  a 
  dusky 
  brownish 
  fly, 
  often 
  seen 
  with 
  wings 
  closely 
  folded 
  sit- 
  

   ting 
  on 
  sedge 
  leaves 
  near 
  quiet 
  waters. 
  It 
  may 
  be 
  taken 
  with 
  the 
  fingers; 
  

   but, 
  if 
  the 
  fingers 
  close 
  too 
  slowly, 
  it 
  will 
  fall 
  to 
  the 
  ground, 
  kick 
  vigor- 
  

   ously 
  several 
  times 
  to 
  push 
  itself 
  into 
  some 
  crevice 
  or 
  tangle 
  of 
  stems 
  and 
  

   lie 
  very 
  quietly; 
  then 
  it 
  will 
  be 
  difficult 
  to 
  find 
  again. 
  The 
  collector 
  may 
  

   take 
  advantage 
  of 
  this 
  habit 
  by 
  bringing 
  his 
  opened 
  cyanid 
  bottle 
  up 
  to 
  

   the 
  insect 
  from 
  below. 
  

  

  This 
  species 
  is 
  widely 
  and 
  generally 
  distributed 
  over 
  the 
  United 
  States, 
  

   and 
  is 
  often 
  very 
  abundant, 
  specially 
  westward. 
  I 
  have 
  seen 
  the 
  grassy 
  

  

  1 
  So 
  called 
  In 
  England 
  because 
  often 
  found 
  on 
  alders 
  overhangingtranquil 
  streams. 
  

  

  