﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  515 
  

  

  Nyml!)h. 
  Total 
  length 
  21 
  mm; 
  abdomen 
  12.5 
  mm; 
  hind 
  femur 
  6 
  

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

  

  To 
  the 
  foregoing 
  generic 
  characterization 
  of 
  the 
  nymphs 
  of 
  C 
  e 
  1 
  i 
  th 
  e- 
  

   m 
  i 
  s 
  and 
  to 
  the 
  statement 
  of 
  the 
  characters 
  made 
  for 
  this 
  species 
  in 
  the 
  

   table, 
  It 
  need 
  only 
  be 
  added 
  here 
  that 
  in 
  this 
  nymph 
  there 
  is 
  a 
  blackish 
  

   band 
  between 
  the 
  eyes, 
  and 
  the 
  femora 
  are 
  ringed 
  with 
  the 
  same 
  color 
  ; 
  

   the 
  abdomen 
  is 
  widest 
  across 
  the 
  sixth 
  segment, 
  beyond 
  which 
  the 
  sides 
  

   seem 
  scarcely 
  narrowed 
  to 
  the 
  tips 
  of 
  the 
  lateral 
  spines 
  of 
  the 
  ninth 
  

   segment; 
  the 
  lateral 
  margins 
  of 
  segments 
  8 
  and 
  9 
  are 
  conspicuously 
  

   spinulose 
  serrate. 
  

  

  The 
  nymphs 
  clamber 
  about 
  on 
  submerged 
  objects, 
  and 
  climb 
  up 
  

   stumps, 
  etc., 
  at 
  the 
  bank 
  to 
  transform, 
  going 
  but 
  a 
  little 
  way, 
  usually 
  not 
  

   farther 
  than 
  a 
  foot. 
  

  

  Celithemis 
  elisa 
  Hagen 
  

  

  1861 
  Dlplax 
  elisa 
  Ha^en, 
  Synopsis 
  Neur. 
  N. 
  Am. 
  p. 
  182 
  

   1867 
  Diplax 
  elisa 
  Packard, 
  Am. 
  nat. 
  1 
  : 
  311, 
  pi. 
  9, 
  fig. 
  5 
  

  

  1862 
  Celitliemis 
  elisa 
  Walsh, 
  Acad. 
  nat. 
  sci. 
  Phil. 
  Proc. 
  p. 
  400 
  

   1875 
  Celithemis 
  elisa 
  Hagen, 
  Bost. 
  soc. 
  nat. 
  hist. 
  Proc. 
  18 
  : 
  67 
  

  

  1893 
  Celithemis 
  elisa 
  Calvert, 
  Am. 
  eut. 
  soc. 
  Traus. 
  20:261 
  (description) 
  

   1895 
  Celithemis 
  elisa 
  Walsh, 
  N. 
  Y. 
  ent. 
  soc. 
  Jour. 
  3 
  : 
  48 
  (listed 
  from 
  Long 
  

   Island, 
  New 
  York 
  and 
  Ithaca) 
  

  

  1899 
  Celithemis 
  elisa 
  Kellicott, 
  Odoiif 
  Ohio, 
  p. 
  104 
  (description) 
  

  

  1900 
  Celithemis 
  elisa 
  Williamson, 
  Dragon 
  flies 
  Ind. 
  p. 
  318 
  (description) 
  

  

  This 
  species 
  has 
  about 
  the 
  same 
  -seasonal 
  range 
  as 
  the 
  preceding. 
  

   E. 
  B. 
  WiUiamson 
  has 
  written 
  {loc. 
  cit. 
  p. 
  319-20) 
  very 
  interestingly 
  of 
  the 
  

   habits 
  of 
  the 
  imago, 
  as 
  follows. 
  

  

  This 
  species 
  may 
  often 
  be 
  found 
  resting 
  on 
  the 
  inflorescence 
  of 
  some 
  of 
  

   the 
  rushes, 
  preferably 
  the 
  bulrush, 
  Scirpus 
  lacustris, 
  growing 
  in 
  

   the 
  shallow 
  waters 
  of 
  our 
  lakes. 
  So 
  perched 
  on 
  a 
  swinging 
  rush, 
  they 
  

   have 
  a 
  wide 
  view 
  of 
  what 
  is 
  going 
  on 
  about 
  them 
  and 
  at 
  the 
  same 
  time 
  

   are 
  inconspicuous, 
  harmonizing 
  well 
  with 
  the 
  dingy 
  brown 
  of 
  the 
  over 
  

   ripe 
  flowers 
  to 
  which 
  they 
  chng. 
  From 
  this 
  vantage 
  ground 
  they 
  make 
  

   sudden 
  dashes 
  at 
  passing 
  Diptera 
  and 
  smaller 
  dragon 
  flies, 
  often 
  returning 
  

   to 
  the 
  identical 
  sedge 
  time 
  and 
  again. 
  Each 
  is 
  the 
  proprietor 
  of 
  a 
  par- 
  

   ticular 
  locahty. 
  When 
  one 
  encroaches 
  on 
  the 
  hunting 
  territory 
  of 
  an- 
  

   other, 
  he 
  is 
  quickly 
  hustled 
  away 
  by 
  the 
  rightful 
  and 
  irate 
  owner 
  . 
  . 
  . 
  The 
  

   females 
  are 
  more 
  retired, 
  and 
  are 
  usually 
  found 
  among 
  the 
  sedges 
  back 
  

   from 
  the 
  water's 
  edge. 
  

  

  Nymph. 
  Measures 
  in 
  total 
  length 
  14.5 
  mm; 
  abdomen 
  8 
  mm; 
  hind 
  

   femur 
  4 
  mm 
  ; 
  width 
  of 
  head 
  4 
  mm, 
  of 
  abdomen 
  5 
  mm. 
  These 
  measure- 
  

   ments 
  are 
  taken 
  from 
  a 
  rather 
  small 
  nymph 
  skin, 
  from 
  New 
  England 
  — 
  a 
  

   bred 
  specimen, 
  and 
  the 
  only 
  specimen 
  in 
  my 
  possession. 
  I 
  should 
  expect 
  

   the 
  typical 
  elisa 
  nymphs 
  from 
  locaHties 
  farther 
  west 
  would 
  be 
  of 
  

   somewhat 
  larger 
  size. 
  

  

  