﻿594 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Fig. 
  

  

  6 
  Genital 
  hamules 
  of 
  O. 
  carolas 
  Ndm. 
  

  

  7 
  Inferior 
  abdominal 
  appendage 
  ofO. 
  carolus 
  Ndm., 
  seen 
  from 
  below 
  

  

  8 
  Head 
  of 
  nymph 
  of 
  Lanthus 
  parvulus 
  Selys, 
  seen 
  from 
  above 
  and 
  in 
  

  

  front 
  

  

  9 
  Mentnm 
  of 
  labium 
  of 
  L. 
  parvulus 
  from 
  above 
  

  

  10 
  End 
  of 
  abdomen 
  ofL. 
  parvulus 
  

  

  11 
  End 
  of 
  abdomen 
  of 
  Gompbus 
  fraternus 
  Say, 
  nymph 
  

  

  12 
  Part 
  of 
  labium 
  of 
  G. 
  fraternus 
  Say, 
  nymph 
  

  

  13 
  End 
  of 
  abdomen 
  of 
  Go 
  mphu 
  s 
  pa 
  11 
  id 
  us 
  Selys, 
  nymph 
  

  

  14 
  Part 
  of 
  labium 
  of 
  Gomphus 
  pallidus 
  Selys, 
  nymph 
  

  

  15 
  End 
  of 
  abdomen 
  of 
  Gomphus 
  spiniceps 
  Walsh, 
  nymph 
  

  

  16 
  Part 
  of 
  labium 
  of 
  Gomphus 
  spiniceps 
  Walsh, 
  nymph 
  

  

  From 
  the 
  Canadian 
  entomologist, 
  1897, 
  v. 
  29, 
  pi. 
  7, 
  ''Preliminary 
  studies 
  

   of 
  North 
  American 
  G 
  o 
  m 
  p 
  h 
  i 
  n 
  a 
  e 
  , 
  " 
  by 
  James 
  G. 
  Needham. 
  

  

  PLATE 
  21 
  

  

  Cordulinae 
  

  

  Fig, 
  

  

  ISomatochlora 
  elongata 
  Selys. 
  Photo 
  from 
  life 
  by 
  J. 
  G. 
  Needham 
  

   2 
  Cast 
  nymph 
  skin 
  of 
  Epicordulia 
  priuceps 
  Hagen 
  : 
  drawn 
  by 
  Mrs 
  

   Needham 
  

  

  PLATE 
  22 
  

  

  Cordulinae 
  

  

  Fig. 
  

   1 
  Epicordulia 
  princeps 
  Hagen, 
  5 
  : 
  drawing 
  by 
  Mrs 
  Needham 
  

  

  2Tetragoneuria 
  spinosa 
  Selys, 
  5 
  showiug 
  peculiar 
  wing 
  markings. 
  

  

  Photo 
  by 
  H. 
  N. 
  Howland. 
  , 
  

  

  PLATE 
  23 
  

  

  Libellulinae 
  

  

  Fig. 
  

   ILibellula 
  semifasciata 
  Burm. 
  

   2L. 
  pulchella 
  Dru. 
  

  

  PLATE 
  24 
  

  

  Libellulinae 
  

  

  Fig. 
  

  

  1 
  Plathemis 
  lydia 
  Dru. 
  

  

  2 
  Celithemis 
  eponina 
  Dru. 
  

   SPerithemis 
  domitia 
  Dru. 
  3 
  

   4 
  P. 
  domitia 
  Dru. 
  $ 
  

  

  PLATE 
  25 
  

  

  Nymphs 
  of 
  Sympetrum 
  

  

  Fig. 
  

  

  1 
  Sympetrum 
  illotum 
  Hagen 
  

  

  2 
  Sympetrum 
  semieinctum 
  Say 
  

  

  