﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  397 
  

  

  been 
  able 
  to 
  give 
  in 
  part 
  3 
  an 
  account 
  of 
  the 
  dragon 
  flies 
  (suborder 
  

   Anisoptera 
  of 
  Odonata) 
  which 
  is 
  almost 
  a 
  monograph 
  of 
  the 
  New 
  York 
  

   species 
  of 
  that 
  group. 
  

  

  But 
  two 
  species 
  of 
  stone 
  flies 
  were 
  seen 
  at 
  Saranac 
  Inn. 
  Both 
  of 
  these 
  

   were 
  reared, 
  and 
  the 
  descriptions 
  of 
  their 
  nymphs, 
  published 
  herewith, 
  

   appear 
  to 
  be 
  the 
  first 
  to 
  be 
  printed 
  for 
  American 
  species. 
  

  

  I 
  have 
  been 
  able 
  to 
  rear 
  representatives 
  of 
  all 
  the 
  New 
  York 
  genera 
  of 
  

   May 
  flies, 
  and 
  present 
  in 
  part 
  3 
  a 
  key 
  for 
  the 
  determination 
  of 
  the 
  nymphs 
  

   of 
  the 
  same 
  — 
  apparently 
  the 
  first 
  key 
  to 
  be 
  published 
  for 
  American 
  

   forms. 
  

  

  In 
  the 
  Neuroptera, 
  with 
  its 
  two 
  families 
  having 
  aquatic 
  genera, 
  I 
  have 
  

   been 
  able 
  to 
  straighten 
  out 
  a 
  tangle 
  in 
  the 
  Sialidae, 
  and 
  to 
  report 
  the 
  dis- 
  

   covery 
  of 
  larvae 
  and 
  pupae 
  of 
  two 
  genera 
  of 
  Hemerobiidae. 
  These 
  two 
  

   are 
  both 
  new 
  species 
  of 
  spongilla 
  flies, 
  representing 
  two 
  genera 
  whose 
  

   larvae 
  live 
  on 
  fresh- 
  water 
  sponges. 
  Entomologically, 
  their 
  discovery 
  was 
  

   one 
  of 
  the 
  best 
  things 
  of 
  the 
  season. 
  Our 
  account 
  of 
  the 
  aquatic 
  Neu- 
  

   roptera 
  is 
  thus 
  considerably 
  more 
  complete 
  than 
  any 
  that 
  have 
  hitherto 
  

   appeared. 
  

  

  Mr 
  Betten 
  occupied 
  himself 
  during 
  the 
  intervals 
  of 
  routine 
  operations 
  

   with 
  the 
  study 
  of 
  the 
  habits 
  and 
  transformations 
  of 
  the 
  caddis 
  flies. 
  He 
  

   has 
  written 
  the 
  account 
  of 
  this 
  order 
  in 
  part 
  3. 
  He 
  collected 
  many 
  speci- 
  

   mens 
  in 
  all 
  stages, 
  and 
  reared 
  four 
  species 
  representing 
  as 
  many 
  genera. 
  

   His 
  descriptions 
  seem 
  to 
  be 
  the 
  first 
  that 
  have 
  appeared 
  for 
  American 
  

   larvae. 
  ~ 
  It 
  is 
  a 
  matter 
  of 
  regret 
  that 
  specific 
  determinations 
  could 
  not 
  

   be 
  had 
  for 
  more 
  of 
  the 
  material 
  in 
  this 
  little 
  studied 
  group. 
  He 
  has 
  pre- 
  

   pared 
  a 
  table 
  for 
  caddis 
  fly 
  larvae, 
  compiled 
  from 
  the 
  descriptions 
  of 
  

   European 
  writers 
  and 
  verified, 
  so 
  far 
  as 
  possible, 
  on 
  his 
  own 
  material, 
  

   and 
  while 
  it 
  is 
  tentative 
  and 
  incomplete, 
  it 
  will 
  doubtless 
  serve 
  a 
  

   temporary 
  purpose. 
  

  

  Aquadc 
  larvae 
  of 
  flies 
  and 
  beetles 
  were 
  abundant 
  at 
  Saranac 
  Inn, 
  but 
  

   there 
  was 
  little 
  time 
  available 
  for 
  their 
  study 
  after 
  attending 
  to 
  the 
  others 
  

   mentioned 
  above. 
  A 
  few 
  of 
  the 
  more 
  interesting 
  ones 
  were 
  reared, 
  how- 
  

   ever, 
  and 
  will 
  be 
  found 
  described 
  in 
  part 
  3. 
  The 
  three 
  bred 
  Diptera 
  

   there 
  described 
  make 
  an 
  interesting 
  addition 
  to 
  our 
  knowledge 
  of 
  the 
  

   larvae 
  of 
  that 
  order. 
  ^ 
  

  

  Apparatus 
  and 
  methods. 
  Little 
  need 
  be 
  said 
  on 
  this 
  head. 
  We 
  

   used 
  the 
  insect 
  nets, 
  cyanid 
  bottles, 
  setting 
  boards, 
  pins, 
  and 
  preserva- 
  

   tives 
  used 
  by 
  all 
  collectors; 
  but 
  our 
  main 
  stay 
  in 
  aquatic 
  collecting 
  was 
  

   the 
  sieve 
  net\ 
  which 
  is 
  shown 
  in 
  use 
  in 
  plate 
  4 
  ; 
  leaning 
  against 
  a 
  tree 
  in 
  

  

  1 
  Described 
  and 
  figured 
  in 
  part 
  O 
  of 
  U. 
  S. 
  nat, 
  mus. 
  Bui. 
  39, 
  p. 
  4. 
  

  

  