﻿530 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  two 
  ; 
  and 
  if 
  some 
  collector 
  find 
  the 
  typical 
  e 
  x 
  u 
  s 
  t 
  a 
  to 
  be 
  common, 
  he 
  

   may 
  aid 
  the 
  farther 
  solution 
  of 
  this 
  question 
  by 
  setting 
  about 
  to 
  find 
  its 
  

   nymph. 
  I 
  discuss 
  below 
  the 
  single 
  form 
  which 
  I 
  have 
  found 
  within 
  the 
  

   state. 
  

  

  Ladona 
  julia 
  Uhler 
  

  

  1857 
  Li 
  be 
  11 
  11 
  la 
  julia 
  Uhler, 
  Acad. 
  nat. 
  sci. 
  Phil. 
  Proc. 
  p. 
  88 
  

   1861 
  Libellnla 
  julia 
  Ha 
  gen, 
  Synopsis 
  Neur. 
  N. 
  Am. 
  p. 
  153 
  

   1867 
  Libellula 
  julia 
  HageD, 
  Stett. 
  ent. 
  zeit. 
  28 
  : 
  192 
  

  

  This 
  species 
  was 
  very 
  common 
  at 
  Saranac 
  Inn. 
  It 
  was 
  beginning 
  to 
  

   appear 
  in 
  numbers 
  on 
  the 
  wing 
  at 
  the 
  time 
  of 
  our 
  arrival, 
  June 
  13. 
  I 
  

   went 
  out 
  to 
  the 
  banks 
  of 
  Little 
  Clear 
  pond 
  at 
  sunrise 
  of 
  the 
  morning 
  of 
  

   the 
  14th 
  and 
  found 
  a 
  number 
  of 
  nymphs 
  transforming, 
  associated 
  with 
  

   Tetragoneuria. 
  The 
  images 
  were 
  abundant 
  along 
  every 
  roadside 
  

   during 
  the 
  month 
  of 
  June, 
  and 
  females 
  were 
  only 
  a 
  little 
  less 
  in 
  evidence 
  

   than 
  the 
  males. 
  Nymphs 
  were 
  taken 
  abundantly 
  from 
  the 
  trashy 
  places 
  

   in 
  the 
  borders 
  of 
  Little 
  Clear 
  and 
  Bone 
  ponds, 
  and 
  a 
  few 
  were 
  found 
  in 
  

   Little 
  Clear 
  creek; 
  exuviae 
  were 
  seen 
  in 
  numbers 
  clinging 
  to 
  the 
  banks 
  

   of 
  Colby 
  pond, 
  and 
  a 
  few 
  along 
  Stony 
  brook 
  near 
  Axton. 
  

  

  Nymph. 
  Total 
  length 
  24 
  mm; 
  abdomen 
  15.5mm; 
  hind 
  femur 
  5.5 
  

   mm; 
  width 
  of 
  head 
  5 
  mm, 
  of 
  abdomen 
  5.5 
  mm. 
  

  

  Body 
  slender, 
  elongate, 
  moderately 
  hairy, 
  dark 
  colored, 
  without 
  distinct 
  

   pattern, 
  but 
  paler 
  on 
  the 
  sutures 
  and 
  below. 
  

  

  Head 
  somewhat 
  wider 
  than 
  long, 
  with 
  eyes 
  not 
  very 
  prominent, 
  and 
  

   hind 
  margin 
  slightly 
  concave; 
  median 
  lobe 
  of 
  the 
  labium 
  with 
  a 
  median 
  

   flat, 
  toothlike 
  prominence 
  in 
  the 
  middle 
  of 
  its 
  free 
  border, 
  on 
  either 
  side 
  

   of 
  which 
  the 
  border 
  is 
  crenulate, 
  with 
  spinules 
  inserted 
  singly 
  in 
  the 
  

   notches 
  between 
  the 
  crenulations 
  ; 
  lateral 
  setae 
  six 
  ; 
  hook 
  slender, 
  and 
  

   not 
  very 
  long; 
  mental 
  setae 
  three 
  each 
  side. 
  

  

  Abdomen 
  with 
  sharp 
  lateral 
  spines, 
  relatively 
  shorter 
  than 
  on 
  the 
  

   nymph 
  of 
  deplanata; 
  dorsal 
  hooks 
  on 
  segments 
  4-8 
  straight 
  and 
  

   sharp 
  ; 
  superior 
  and 
  inferior 
  appendages 
  of 
  about 
  equal 
  length, 
  and 
  

   about 
  as 
  long 
  as 
  the 
  last 
  two 
  abdominal 
  segments 
  ; 
  lateral 
  appendages 
  

   one 
  fifth 
  to 
  one 
  fourth 
  as 
  long 
  as 
  the 
  others. 
  

  

  The 
  presence 
  of 
  three 
  mental 
  setae 
  on 
  the 
  labium 
  will 
  distinguish 
  this 
  

   species 
  at 
  a 
  glance 
  from 
  the 
  nymph 
  ofL. 
  deplanata 
  of 
  the 
  south. 
  

  

  LIBELLULA 
  

  

  This 
  genus 
  contains 
  the 
  species 
  which 
  are, 
  perhaps, 
  the 
  best 
  known 
  of 
  

   all 
  our 
  dragon 
  flies. 
  The 
  imagos 
  hover 
  habitually 
  over 
  ponds 
  in 
  summer, 
  

   are 
  large, 
  and 
  for 
  the 
  most 
  part 
  beautifully 
  colored, 
  and 
  are 
  everywhere 
  

   common. 
  Eight 
  species 
  are 
  known 
  from 
  the 
  state, 
  and 
  it 
  is 
  not 
  likely 
  

   that 
  any 
  others 
  will 
  be 
  found 
  resident 
  in 
  numbers. 
  It 
  is 
  of 
  course 
  always 
  

   possible 
  for 
  a 
  few 
  strays 
  to 
  be 
  blown 
  into 
  new 
  territory 
  from 
  distant 
  

   regions 
  by 
  high 
  winds. 
  The 
  nymphs 
  of 
  five 
  of 
  these 
  eight 
  species 
  ar0 
  

  

  