﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  

  

  505 
  

  

  flight 
  than 
  that 
  species, 
  but 
  they 
  dash 
  along 
  shore 
  on 
  shining, 
  transparent 
  

   wings, 
  dancing 
  in 
  and 
  out 
  of 
  the 
  Httle 
  coves 
  in 
  the 
  edge^of 
  the 
  sphagnum 
  

   fringe, 
  and 
  once 
  in 
  a 
  while 
  are 
  seen 
  resting 
  on 
  the 
  tall 
  summit 
  of 
  some 
  

   pitcher 
  plant 
  flower. 
  

  

  The 
  one 
  nymph 
  I 
  obtained 
  was 
  taken 
  from 
  the 
  edge 
  of 
  Little 
  Clear 
  

   pond 
  at 
  the 
  outlet, 
  and 
  was 
  reared, 
  transforming 
  July 
  7. 
  From 
  that 
  

   cast 
  skin 
  the 
  following 
  description 
  of 
  the 
  nymph 
  was 
  drawn 
  up. 
  The 
  

  

  Fig. 
  28 
  Dor 
  oc 
  or 
  dull 
  a, 
  end 
  of 
  abdomen, 
  a, 
  b 
  and 
  c 
  of 
  D. 
  libera 
  Sel.; 
  a;, 
  j/and 
  ^ 
  D. 
  lepida 
  

   Hag. 
  

  

  specimen 
  is 
  in 
  the 
  New 
  York 
  state 
  collection 
  at 
  Albany. 
  The 
  study 
  of 
  

   this 
  specimen, 
  which 
  was 
  preserved 
  and 
  labeled 
  by 
  myself 
  with 
  such 
  

   promptness 
  and 
  care 
  as 
  to 
  preclude 
  error 
  or 
  confusion 
  of 
  species 
  among 
  

   my 
  specimens, 
  reveals 
  an 
  error 
  in 
  Cabot's 
  work 
  on 
  the 
  corduhne 
  nymphs. 
  

   The 
  one 
  he 
  described 
  asSom. 
  libera, 
  raised, 
  can 
  not 
  have 
  been 
  of 
  

   that 
  species. 
  I 
  have 
  not 
  seen 
  his 
  specimen, 
  but 
  both 
  his 
  description 
  and 
  

   his 
  figure 
  disagree 
  utterly 
  with 
  my 
  specimen. 
  They 
  agree 
  quite 
  well 
  with 
  

   the 
  nymph 
  of 
  Helocordulia 
  uhleri,and 
  I 
  think 
  they 
  may 
  have 
  

   belonged 
  to 
  that 
  species 
  or 
  to 
  H. 
  s 
  e 
  1 
  y 
  s 
  i 
  . 
  

  

  Nymph. 
  Total 
  length 
  21 
  mm; 
  abdomen 
  11 
  mm; 
  hind 
  femur 
  

   6 
  mm; 
  width 
  of 
  head 
  5.5 
  mm, 
  of 
  abdomen 
  7 
  mm. 
  

  

  Very 
  similar 
  to 
  the 
  nymph 
  of 
  C. 
  s 
  h 
  u 
  r 
  1 
  1 
  e 
  f 
  f 
  i 
  , 
  but 
  smaller, 
  and 
  with 
  

   the 
  black 
  band 
  across 
  the 
  head 
  broader 
  between 
  the 
  eyes, 
  the 
  eyes 
  them- 
  

   selves 
  more 
  prominent 
  laterally, 
  and 
  the 
  hind 
  angles 
  of 
  the 
  head 
  more 
  

   angulate; 
  labium 
  similar; 
  lateral 
  setae 
  seven; 
  mental 
  setae 
  12-13, 
  ^^ch 
  

   side, 
  the 
  fifth 
  (counting 
  from 
  the 
  side) 
  longest, 
  the 
  others 
  regularly 
  

   grading 
  up 
  to 
  it; 
  abdomen 
  similar, 
  but 
  the 
  very 
  rudimentary 
  dorsal 
  

   hooks 
  a 
  little 
  more 
  prominent 
  on 
  the 
  middle 
  segments 
  (perhaps 
  a 
  little 
  

   less 
  obscured 
  by 
  tufted 
  hairs 
  about 
  them) 
  ; 
  lateral 
  spines 
  longer 
  on 
  

   segments 
  8 
  and 
  9, 
  about 
  a 
  third 
  the 
  length 
  of 
  their 
  respective 
  segments 
  ; 
  

   inferior 
  appendages 
  longer 
  than 
  the 
  superior, 
  which 
  in 
  turn 
  is 
  longer 
  

   than 
  the 
  laterals. 
  

  

  