﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  407 
  

  

  formation 
  was 
  certainly 
  only 
  opening. 
  I 
  collected 
  all 
  that 
  appeared 
  after 
  

   that 
  daily 
  till 
  the 
  end 
  of 
  June, 
  at 
  which 
  time 
  all 
  the 
  species 
  for 
  which 
  I 
  

   thought 
  such 
  counting 
  practicable 
  had 
  ceased 
  transforming 
  for 
  the 
  year- 
  

   The 
  results 
  of 
  the 
  count 
  are 
  as 
  follows. 
  

  

  82 
  Gomphus 
  exilis 
  Selys 
  

  

  20 
  Gomphus 
  brevis 
  Selys 
  

  

  18 
  Gomphus 
  spicatus 
  Selys 
  

  

  24 
  Ophiogomphus 
  aspersus 
  Morse 
  

  

  II 
  Hagenius 
  brevistylus 
  Selys 
  

   7 
  Cordulegaster 
  maculatus 
  Selys 
  

   I 
  Didymops 
  transversa 
  Say 
  

   I 
  Tetragoneuria 
  semiaqua 
  Burin. 
  

   6 
  Basiaeschna 
  Janata 
  Say 
  

  

  Intermingled 
  with 
  these 
  were 
  the 
  cast 
  skins 
  of 
  a 
  number 
  of 
  species 
  

   whose 
  period 
  of 
  transformation 
  was 
  not 
  finished, 
  perhaps, 
  by 
  the 
  end 
  of 
  

   the 
  month 
  of 
  June; 
  viz 
  Galop 
  teryx 
  maculata 
  Beauv. 
  (12), 
  Argia 
  

   violacea 
  Hagen 
  (20), 
  Enallagma 
  sp.? 
  (5), 
  Boyeria 
  vinosa 
  

   Say 
  (3), 
  and 
  Aeschna 
  constricta 
  Say 
  (2). 
  

  

  It 
  is 
  difficult 
  to 
  conceive 
  how 
  so 
  many 
  of 
  the 
  large 
  rapacious 
  Gomphine 
  

   nymphs 
  can 
  get 
  a 
  living 
  in 
  so 
  small 
  space. 
  I 
  do 
  not 
  believe 
  that, 
  judging 
  

   by 
  repeated 
  collecting, 
  they 
  were 
  more 
  abundant 
  here 
  than 
  in 
  other 
  

   basins 
  along 
  the 
  creek. 
  I 
  collected 
  in 
  this 
  same 
  place 
  with 
  a 
  .sieve 
  net 
  

   after 
  this 
  count 
  was 
  ended 
  the 
  nymphs 
  of 
  the 
  next 
  season's 
  brood, 
  and 
  

   obtained 
  in 
  15 
  minutes' 
  use 
  of 
  the 
  net 
  22 
  C 
  or 
  dule 
  gas 
  ter 
  macu- 
  

   latus, 
  2 
  Hagenius 
  brevistylus, 
  40 
  Gomphus 
  and 
  

   Ophiogomphus, 
  8 
  Calopteryx 
  maculata 
  and 
  4 
  Didy- 
  

   mops 
  transversa. 
  

  

  The 
  life 
  of 
  the 
  rapids. 
  At 
  the 
  railroad 
  Little 
  Clear 
  creek 
  pours 
  out 
  

   of 
  the 
  culvert 
  and 
  tumbles 
  over 
  a 
  little 
  bed 
  of 
  stones. 
  This 
  is 
  the 
  only 
  

   rapids 
  within 
  easy 
  reach 
  from 
  the 
  hatchery. 
  There 
  was 
  no 
  time 
  for 
  a 
  

   quantitative 
  study 
  of 
  its 
  life, 
  but 
  we 
  studied 
  it 
  as 
  carefully 
  as 
  time 
  would 
  

   permit. 
  

  

  The 
  most 
  abundant 
  and 
  important 
  animal 
  in 
  the 
  rapids 
  is 
  the 
  black 
  

   fly, 
  Simulium 
  venustum 
  Say. 
  With 
  the 
  exception 
  of 
  a 
  few 
  Chiro- 
  

   nomidae 
  which 
  live 
  in 
  the 
  " 
  skin 
  algae 
  ", 
  covering 
  the 
  broader 
  surfaces 
  

   over 
  which 
  the 
  water 
  glides, 
  all 
  the 
  hfe 
  of 
  the 
  rapids 
  seems 
  to 
  center 
  in 
  

   the 
  Simulium 
  colonies. 
  These 
  are 
  very 
  extensive 
  indeed, 
  masses 
  of 
  the 
  

   swaying, 
  dark 
  greenish 
  larvae, 
  or 
  of 
  the 
  yellowish 
  pupae 
  covering 
  the 
  

   stones 
  over 
  considerable 
  areas. 
  

  

  