﻿514 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  KEY 
  TO 
  SPECIES 
  OF 
  CELITHEMIS 
  

  

  Lnagos 
  

  

  a 
  Wings 
  spotted 
  with 
  brown 
  beyond 
  the 
  nodns 
  

  

  h 
  Expanse 
  of 
  wings 
  at 
  least 
  65 
  mm 
  ; 
  a 
  band 
  of 
  brown 
  on 
  the 
  wings 
  at 
  the 
  

  

  nodus 
  reaching 
  almost 
  across 
  the 
  wings 
  eponina 
  

  

  hi 
  Expanse 
  of 
  wings 
  not 
  over 
  60 
  mm; 
  a 
  small 
  rounded 
  spot 
  of 
  brown 
  just 
  

  

  beyond 
  the 
  nodus 
  elisa 
  

  

  aa 
  Wings 
  with 
  no 
  brown 
  markings 
  except 
  at 
  base 
  ornata 
  

  

  Nymphs 
  

  

  a 
  Unknown 
  ornata 
  

  

  aa 
  Dorsal 
  hooks 
  well 
  developed 
  on 
  abdominal 
  segments 
  4 
  to 
  7, 
  longest 
  

   on 
  segment 
  6 
  and 
  sharp 
  ; 
  lateral 
  spines 
  of 
  the 
  ninth 
  segment 
  reaching 
  

   level 
  of 
  the 
  apices 
  of 
  the 
  inferior 
  appendages 
  ; 
  lateral 
  setae 
  eight 
  or 
  

  

  nine 
  eponina 
  

  

  aaa 
  Dorsal 
  hooks 
  weakly 
  developed 
  on 
  segments 
  5 
  to 
  7, 
  short, 
  but 
  pointed 
  ; 
  

   lateral 
  spines 
  of 
  the 
  ninth 
  segment 
  attaining 
  only 
  the 
  level 
  of 
  the 
  tip 
  

   of 
  the 
  superior 
  appendage; 
  lateral 
  setae 
  seven 
  elisa 
  

  

  Celithemis 
  eponina 
  Drury 
  

  

  Plate 
  24, 
  fig. 
  2 
  

   1773 
  Libellula 
  eponina 
  Drury, 
  lUus. 
  exotic 
  ins. 
  v. 
  2, 
  pi. 
  47, 
  fig. 
  2 
  

   1861 
  C 
  el 
  i 
  them 
  is 
  eponina 
  Hagen, 
  Synopsis 
  Neur. 
  N. 
  Am. 
  p. 
  147 
  

   1875 
  Celithemis 
  eponina 
  Hagen, 
  Bost. 
  soc. 
  nat. 
  hist. 
  Proc. 
  18 
  : 
  66-67 
  

   1893 
  Celithemis 
  eponina 
  Calvert, 
  Am. 
  ent. 
  soc. 
  Trans. 
  20:261 
  (des- 
  

   cription) 
  

   1895-97 
  Celithemis 
  eponina 
  N. 
  Y. 
  ent. 
  soc. 
  Jour. 
  3:48 
  and 
  5:94 
  (listed 
  

   from 
  Westchester 
  eo. 
  New 
  York, 
  Lake 
  Bluff, 
  Wayne 
  co.) 
  

  

  1898 
  Celithemis 
  eponina 
  Needham, 
  Outdoor 
  studies, 
  p. 
  60, 
  fig. 
  60, 
  

  

  (habits) 
  

  

  1899 
  Celithemis 
  eponina 
  Kellicott, 
  Odon. 
  Ohio, 
  p. 
  103 
  

  

  1900 
  Celithemis 
  eponina 
  Williamson, 
  Dragon 
  flies 
  Ind. 
  p. 
  318 
  

  

  This 
  beautiful 
  skimmer 
  is 
  abroad 
  about 
  the 
  latter 
  end 
  of 
  June 
  and 
  the 
  

   first 
  weeks 
  of 
  July 
  in 
  our 
  latitude. 
  It 
  frequents 
  the 
  borders 
  of 
  ponds 
  

   and 
  neighboring 
  grassy 
  slopes, 
  and 
  sometimes 
  when 
  foraging, 
  it 
  is 
  carried 
  

   far 
  from 
  water 
  by 
  the 
  winds. 
  Its 
  flight 
  is 
  not 
  the 
  swiftest 
  or 
  the 
  most 
  

   continuous, 
  and 
  there 
  is 
  a 
  flutter 
  to 
  it 
  suggestive 
  of 
  the 
  flight 
  of 
  a 
  butterfly. 
  

   So 
  far 
  as 
  I 
  have 
  observed, 
  the 
  female 
  in 
  ovipositing 
  is 
  held 
  by 
  the 
  male, 
  

   and 
  both 
  are 
  apt 
  to 
  be 
  seen 
  on 
  windy 
  days 
  when 
  other 
  species 
  are 
  in 
  

   shelter, 
  dipping 
  to 
  the 
  surfaces 
  of 
  foaming 
  waves, 
  far 
  out 
  from 
  shore. 
  

   The 
  eggs 
  are 
  better 
  distributed 
  than 
  in 
  most 
  related 
  species, 
  and, 
  pos- 
  

   sibly 
  for 
  this 
  reason, 
  they 
  seem 
  to 
  be 
  somewhat 
  fewer, 
  and 
  of 
  larger 
  size. 
  

   Each 
  egg 
  is 
  rotund 
  oblong, 
  whitish 
  at 
  first, 
  soon 
  turning 
  yellowish. 
  

  

  