﻿412 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  dd 
  Prolegs, 
  when 
  present, 
  on 
  more 
  than 
  ono 
  abdominal 
  segment; 
  if 
  

   present 
  on 
  the 
  last 
  segment, 
  then 
  not 
  armed 
  with 
  single 
  or 
  double 
  

   claws 
  ; 
  often 
  entirely 
  wanting 
  

   e 
  With 
  five 
  pairs 
  of 
  prolegs, 
  and 
  with 
  no 
  spiracles 
  at 
  the 
  apex 
  of 
  the 
  

  

  abdomen 
  (moths) 
  Lepidoptera 
  

  

  ee 
  Generally 
  without 
  prolegs; 
  never 
  with 
  five 
  pairs 
  of 
  them; 
  usually 
  

   with 
  terminal 
  spiracles 
  ; 
  long, 
  lateral 
  filaments 
  often 
  present 
  on 
  

  

  the 
  abdominal 
  segments 
  (beetles) 
  Col 
  eoptera 
  

  

  bh 
  Without 
  jointed 
  thoracic 
  legs; 
  with 
  abdominal 
  prolegs, 
  or 
  entirely 
  legless 
  ; 
  

   in 
  the 
  more 
  degenerate 
  forms, 
  the 
  head 
  is 
  reduced 
  and 
  retracted 
  within 
  

   the 
  pointed 
  apex 
  of 
  the 
  thorax, 
  no 
  appendages 
  of 
  the 
  imago 
  are 
  visible, 
  

   and 
  the 
  papa 
  is 
  formed 
  within 
  the 
  contracted 
  and 
  hardened 
  larval 
  skin 
  

  

  (flies, 
  etc.) 
  Diptera 
  

  

  Those 
  orders, 
  on 
  which 
  some 
  life 
  history 
  work 
  was 
  done 
  at 
  our 
  station, 
  

   are 
  severally 
  discussed 
  below. 
  That 
  some 
  of 
  these, 
  notably 
  the 
  Coleop- 
  

   tera 
  and 
  the 
  Diptera, 
  were 
  slighted, 
  is 
  only 
  too 
  apparent, 
  and 
  no 
  one 
  

   will 
  be 
  so 
  regretful 
  as 
  we 
  are 
  that 
  no 
  more 
  time 
  could 
  be 
  given 
  to 
  the 
  

   study 
  of 
  these 
  ; 
  but 
  the 
  other 
  orders 
  treated 
  seemed 
  to 
  be 
  in 
  more 
  press- 
  

   ing 
  need 
  of 
  study; 
  and 
  we 
  always 
  had 
  more 
  life 
  history 
  material 
  avail- 
  

   able 
  than 
  could 
  be 
  attended 
  to 
  by 
  two 
  pairs 
  of 
  hands. 
  A 
  few 
  random 
  

   notes 
  on 
  the 
  representatives 
  of 
  those 
  orders 
  which 
  received 
  from 
  us 
  

   no 
  study 
  whatever, 
  will 
  be 
  found 
  grouped 
  together 
  under 
  a 
  final 
  heading. 
  

  

  Order 
  PLECOPTERA 
  

   Stone 
  flies 
  

  

  The 
  stone 
  flies 
  are 
  all 
  aquatic. 
  They 
  frequent 
  rapid 
  streams, 
  and 
  are 
  

   most 
  abundant 
  in 
  those 
  places 
  wher6 
  the 
  water 
  dashes 
  over 
  heaps 
  of 
  

   broken, 
  half 
  submerged 
  rocks. 
  In 
  summer 
  one 
  may 
  often 
  see 
  in 
  such 
  

   places 
  the 
  projecting 
  top 
  of 
  a 
  rock 
  decorated 
  with 
  the 
  empty 
  skins 
  which 
  

   the 
  adult 
  stone 
  flies 
  left 
  behind 
  when 
  they 
  left 
  the 
  water 
  and 
  acquired 
  

   wings. 
  To 
  f;nd 
  the 
  nymphs 
  one 
  need 
  but 
  lift 
  a 
  stone 
  from 
  the 
  water 
  

   quickly, 
  turn 
  it 
  over 
  and 
  look 
  at 
  it. 
  The 
  flat, 
  closely 
  clinging 
  nymphs 
  

   will 
  be 
  seen 
  with 
  their 
  legs 
  at 
  full 
  stretch 
  and 
  their 
  claws 
  gripping 
  the 
  

   rock, 
  or 
  running 
  from 
  one 
  depression 
  to 
  another, 
  seeking 
  to 
  hide. 
  

  

  The 
  nymphs 
  are 
  Httle 
  known. 
  In 
  this 
  country 
  they 
  have 
  received 
  

   hardly 
  any 
  attention, 
  which 
  is 
  surprising, 
  considering 
  that 
  they 
  are 
  so 
  

   easy 
  to 
  collect 
  and 
  to 
  rear, 
  and 
  that 
  they 
  live 
  in 
  places 
  in 
  general 
  so 
  

   attractive 
  to 
  us. 
  The 
  good 
  angler 
  who 
  has 
  the 
  blood 
  of 
  a 
  naturalist 
  in 
  

   him 
  is 
  likely 
  to 
  know 
  the 
  species 
  of 
  stone 
  flies, 
  both 
  nymphs 
  and 
  adults, 
  

   better 
  than 
  does 
  the 
  average 
  professional 
  entomologist. 
  The 
  systematic 
  

   study 
  of 
  the 
  order 
  is 
  little 
  advanced 
  beyond 
  the 
  point 
  where 
  Pictet 
  left 
  it 
  

   60 
  years 
  ago^: 
  his 
  work 
  is 
  still 
  the 
  best 
  textbook 
  of 
  the 
  group 
  to 
  be 
  had. 
  

  

  1 
  Hlstorle 
  naturelle 
  des 
  neuropteres: 
  perlides. 
  Paris 
  1841. 
  

  

  