﻿506 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  • 
  

  

  Dorocordulia 
  lepida 
  Selys 
  

  

  1871 
  Cordulia 
  lepida 
  Selys, 
  Acad. 
  Belg. 
  (2) 
  Bui. 
  31 
  : 
  264 
  

  

  1872-75 
  Cordulia 
  lepida 
  Hagen, 
  Bost. 
  soc. 
  nat. 
  hist. 
  Proc. 
  15 
  : 
  270 
  and 
  

  

  18 
  : 
  60 
  

   1895 
  Somatochlora 
  lepida 
  Calvert, 
  N. 
  Y. 
  ent. 
  soc. 
  Jour. 
  3 
  : 
  46 
  (listed 
  

   from 
  Albany) 
  

   This 
  species 
  was 
  originally 
  described 
  from 
  specimens 
  sent 
  from 
  

   Albany; 
  it 
  seems 
  not 
  to 
  have 
  been 
  taken 
  in 
  the 
  state 
  since 
  that 
  time. 
  

   Its 
  nymph 
  is 
  unknown. 
  

  

  Dorocordulia 
  lintneri 
  Hagen 
  

  

  1854 
  Emmons, 
  Agric. 
  N. 
  Y. 
  v. 
  5, 
  pi. 
  15, 
  fig. 
  1 
  (colored 
  fig. 
  : 
  no 
  

  

  name 
  or 
  description) 
  

   1878 
  Cordulia 
  lintneri 
  Hagen, 
  Acad. 
  Belg. 
  (2) 
  Bui. 
  45 
  : 
  187 
  

   1890 
  Cordulia 
  lintneri 
  Hagen, 
  Psyche, 
  5:272, 
  pi. 
  1, 
  fig. 
  10-17 
  (a 
  full 
  

  

  account) 
  

   1895 
  Somatochlora 
  lintneri, 
  Calvert, 
  N. 
  Y. 
  ent. 
  soc. 
  Jour, 
  3 
  ; 
  46 
  (listed 
  

  

  from 
  Center, 
  Albany 
  co.) 
  

  

  But 
  few 
  specimens 
  are 
  known 
  of 
  this 
  very 
  interesting 
  species, 
  which 
  

   lias 
  a 
  distribution 
  from 
  New 
  York 
  to 
  Saskatchewan. 
  Its 
  nymph 
  is 
  

   unknown. 
  

  

  Subfamily 
  libe^llulinae^ 
  

  

  This 
  extensive 
  group 
  includes 
  the 
  commonest 
  and 
  best 
  known 
  of 
  all 
  

   our 
  Odonata. 
  The 
  images 
  are 
  familiar 
  figures 
  above 
  every 
  pond 
  and 
  

   ditch, 
  and 
  by 
  every 
  roadside. 
  The 
  nymphs 
  are 
  less 
  w^ell 
  known, 
  not- 
  

   withstanding 
  their 
  relative 
  abundance, 
  than 
  in 
  some 
  of 
  the 
  smaller 
  groups. 
  

   Our 
  tables 
  which 
  follow 
  are 
  the 
  first 
  to 
  be 
  given 
  for 
  American 
  forms, 
  

   and 
  the 
  descriptions 
  also 
  are 
  entirely 
  new, 
  with 
  the 
  exception 
  of 
  the 
  

   nymphs 
  of 
  P 
  a 
  n 
  t 
  a 
  1 
  a 
  and 
  T 
  r 
  a 
  m 
  e 
  a, 
  which 
  alone 
  have 
  been 
  described 
  

   by 
  Cabot. 
  The 
  following 
  keys 
  will 
  serve 
  for 
  the 
  separation 
  of 
  both 
  

   nymphs 
  and 
  imagos. 
  

  

  KEY 
  TO 
  GENERA 
  

  

  Imagos 
  

  

  a 
  Triangle 
  of 
  the 
  fore 
  wings 
  four-sided; 
  anal 
  loop 
  poorly 
  developed, 
  not 
  foot 
  

  

  shaped 
  Nannothemis 
  p. 
  509 
  

  

  aa 
  Triangle 
  of 
  the 
  fore 
  wing 
  fully 
  differentiated, 
  three- 
  sided; 
  anal 
  loop 
  well 
  

  

  developed 
  and 
  foot-shaped 
  

  

  }) 
  Triangle 
  of 
  the 
  fore 
  wing 
  with 
  its 
  front 
  and 
  inner 
  sides 
  meeting 
  by 
  an 
  angle 
  

  

  of 
  about 
  100° 
  ; 
  the 
  subtriangle 
  without 
  cross 
  veins: 
  the 
  vein 
  which 
  

  

  bisects 
  the 
  anal 
  loop 
  straight 
  Perithemis 
  p. 
  511 
  

  

  