﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  415 
  

  

  having 
  made 
  their 
  way 
  upstairs, 
  seeking 
  their 
  freedom. 
  They 
  were 
  not 
  

   observed 
  flying, 
  except 
  from 
  the 
  place 
  of 
  transformation 
  to 
  the 
  window. 
  

  

  Empty 
  nymph 
  skins 
  were, 
  on 
  the 
  contrary, 
  very 
  abundant. 
  There 
  

   were 
  hundreds 
  sticking 
  to 
  the 
  sides 
  of 
  the 
  hatchery 
  troughs, 
  thickest 
  

   near 
  the 
  inflow 
  pipe, 
  but 
  some 
  were 
  to 
  be 
  found 
  on 
  all 
  the 
  troughs. 
  

  

  Observing 
  that 
  the 
  season 
  for 
  the 
  species 
  was 
  waning, 
  we 
  lost 
  no 
  time 
  

   emptying 
  the 
  supply 
  trough 
  and 
  sifting 
  its 
  contents. 
  Thus 
  we 
  obtained 
  

   two 
  nymphs, 
  one 
  of 
  which 
  was 
  reared. 
  

  

  Imago. 
  Length 
  to 
  tip 
  of 
  wings 
  12 
  mm; 
  antennae 
  7 
  mm 
  more. 
  

   Setae 
  two 
  thirds 
  as 
  long 
  as 
  the 
  abdomen, 
  hardly 
  surpassing 
  the 
  tips 
  of 
  

   the 
  wings. 
  Expanse 
  of 
  wings 
  21 
  mm. 
  

  

  Color 
  light 
  green. 
  Antennae 
  brownish 
  black, 
  except 
  a 
  small 
  paler 
  

   part 
  just 
  beyond 
  the 
  base. 
  A 
  broad 
  U-shaped 
  mark 
  on 
  the 
  top 
  of 
  the 
  

   head, 
  just 
  including 
  the 
  ocelH. 
  A 
  blackish 
  brown 
  stripe 
  each 
  side 
  of 
  the 
  

   prothorax, 
  darkest 
  anteriorly, 
  continued 
  on 
  the 
  mesothorax, 
  diffused 
  

   posteriorly. 
  Abdomen 
  greenish, 
  washed 
  with 
  brown 
  dorsally, 
  specially 
  

   toward 
  its 
  lateral 
  margins. 
  Setae 
  brownish. 
  Legs 
  greenish, 
  a 
  little 
  

   darker 
  exteriorly 
  and 
  at 
  the 
  tips 
  of 
  the 
  tarsal 
  segments. 
  Wings 
  green 
  ; 
  

   veins 
  very 
  faintly 
  touched 
  with 
  brown. 
  

  

  Nymph. 
  Fully 
  grown, 
  measures 
  9 
  mm; 
  setae 
  ^.^ 
  mm 
  more. 
  

  

  Body 
  slender, 
  sHghtly 
  depressed. 
  Head 
  hardly 
  wider 
  than 
  prothorax 
  

   or 
  than 
  abdomen; 
  the 
  latter 
  a 
  little 
  widened 
  in 
  the 
  middle 
  and 
  a 
  little 
  

   more 
  narrowed 
  at 
  the 
  posterior 
  than 
  at 
  the 
  anterior 
  end. 
  

  

  Color 
  greenish 
  to 
  pale 
  brownish. 
  Antennae 
  green 
  at 
  base, 
  becoming 
  

   brownish 
  at 
  tip, 
  stout 
  at 
  base, 
  rapidly 
  tapering. 
  The 
  broad 
  U-shaped 
  

   mark 
  on 
  the 
  top 
  of 
  the 
  head 
  in 
  the 
  adult 
  is 
  present 
  in 
  the 
  nymph, 
  the 
  

   base 
  of 
  the 
  U 
  being 
  laterally 
  extended 
  in 
  a 
  transverse 
  band 
  which 
  meets 
  

   the 
  eyes 
  and 
  extends 
  two 
  angles 
  anteriorly 
  toward 
  the 
  mouth 
  each 
  side. 
  

   Prothorax 
  with 
  two 
  lateral 
  stripes, 
  darkest 
  anteriorly. 
  Two 
  pairs 
  of 
  small 
  

   spots 
  on 
  mesonotum 
  and 
  on 
  metanotum 
  between 
  the 
  bases 
  of 
  the 
  wings. 
  

  

  Abdomen 
  with 
  three 
  distinct 
  blackish 
  brown 
  stripes, 
  a 
  median 
  one 
  

   and 
  two 
  lateral 
  ones, 
  the 
  latter 
  ending 
  on 
  the 
  bases 
  of 
  the 
  setae. 
  

   Setae 
  stout 
  at 
  base, 
  rapidly 
  tapering 
  ; 
  brown 
  at 
  base, 
  becoming 
  paler 
  

   distally. 
  Legs 
  pale 
  greenish. 
  Ventral 
  aspect, 
  whitish 
  or 
  pale 
  green. 
  

  

  No 
  tracheal 
  gills. 
  

  

  Numerous 
  specimens. 
  Adirondack 
  hatchery, 
  Saranac 
  Inn 
  N. 
  Y. 
  

   June. 
  Observed 
  till 
  June 
  21, 
  when 
  the 
  last 
  specimen 
  was 
  taken. 
  

  

  LEUCTRA 
  

  

  This 
  genus 
  includes 
  the 
  slenderest 
  of 
  stone 
  flies; 
  small, 
  brownish 
  

   species, 
  with 
  wings 
  closely 
  inwrapping 
  the 
  body 
  on 
  the 
  dorsal 
  side. 
  Mr 
  

   McLachlan 
  says 
  that 
  the 
  females 
  in 
  this 
  genus 
  carry 
  their 
  eggs 
  on 
  their 
  

   backs, 
  extruding 
  them 
  from 
  the 
  upturned 
  end 
  segment 
  of 
  the 
  abdomen 
  

   and 
  pushing 
  them 
  toward 
  the 
  bases 
  of 
  the 
  hind 
  wings. 
  ^ 
  

  

  1 
  Ent. 
  month, 
  mag. 
  1865. 
  1 
  : 
  216. 
  

  

  