﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  507 
  

  

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

   of 
  about 
  90°; 
  sabtriangle 
  divided 
  into 
  three 
  or 
  more 
  cells; 
  bisector 
  of 
  the 
  

   anal 
  loop 
  sinuous 
  

   c 
  Triangle 
  of 
  the 
  fore 
  wing 
  not 
  placed 
  distinctly 
  beyond 
  the 
  level 
  of 
  the 
  

   apex 
  of 
  the 
  triangle 
  in 
  the 
  hind 
  wing; 
  pterostigma 
  with 
  its 
  ends 
  parallel 
  

   or 
  not 
  distinctly 
  divergent 
  

   d 
  The 
  sectors 
  of 
  the 
  arculus 
  (veins 
  M1-3 
  and 
  M4) 
  in 
  the 
  fore 
  wing 
  more 
  or 
  

   less 
  completely 
  fused 
  for 
  a 
  short 
  distance 
  beyond 
  the 
  arculus 
  ; 
  the 
  

   triangle 
  of 
  the 
  fore 
  wing 
  not 
  greatly 
  produced 
  posteriorly, 
  and 
  

   (except 
  in 
  Celithemis) 
  normally 
  containing 
  but 
  a 
  single 
  cross 
  

   vein, 
  and 
  followed 
  by 
  two 
  or 
  three 
  rows 
  of 
  cells 
  

   e 
  Vein 
  Cui 
  of 
  the 
  hind 
  wing 
  departing 
  from 
  the 
  triangle 
  at 
  the 
  hind 
  angle 
  

   / 
  Sectors 
  of 
  the 
  arculus 
  (veins 
  M1-3 
  and 
  M4) 
  contiguous, 
  but 
  in- 
  

   completely 
  fused 
  for 
  a 
  distance 
  beyond 
  the 
  arculus; 
  wings 
  

   generally 
  conspicuously 
  spotted 
  with 
  yellow 
  or 
  reddish 
  brown 
  

  

  Celithemis 
  p. 
  513 
  

  

  ff 
  Sectors 
  of 
  the 
  arculus 
  in 
  the 
  hind 
  wing 
  distinctly 
  fused 
  for 
  a 
  distance 
  

  

  beyond 
  the 
  arculus 
  

  

  g 
  Stigma 
  short 
  and 
  thick, 
  about 
  twice 
  as 
  long 
  as 
  wide 
  ; 
  anal 
  loop 
  

  

  with 
  a 
  big 
  heel, 
  there 
  being 
  generally 
  four 
  cells 
  between 
  the 
  

  

  bisector 
  and 
  the 
  heel 
  point 
  ; 
  face 
  pure 
  white 
  

  

  Leucorhinia 
  p. 
  516 
  

   gg 
  Stigma 
  more 
  than 
  three 
  times 
  as 
  long 
  as 
  wide 
  ; 
  anal 
  loop 
  generally 
  

   with 
  but 
  two 
  cells 
  between 
  the 
  bisector 
  and 
  the 
  heel 
  point 
  

  

  Sympetrum 
  p. 
  519 
  

   ee 
  Vein 
  Cui 
  of 
  the 
  hind 
  wing 
  migrated 
  a 
  little 
  way 
  up 
  the 
  outer 
  side 
  of 
  

   the 
  triangle, 
  separating 
  itself 
  at 
  a 
  distance 
  from 
  the 
  hind 
  angle 
  

   /With 
  a 
  single 
  cross 
  vein 
  under 
  the 
  stigma, 
  and 
  a 
  long 
  vacant 
  

  

  space 
  before 
  that 
  cross 
  vein 
  Pachydiplax 
  p. 
  526 
  

  

  ff 
  With 
  two 
  cross 
  veins 
  under 
  the 
  stigma 
  and 
  the 
  adjacent 
  spaces 
  

   more 
  normal 
  

   g 
  With 
  a 
  single 
  row 
  of 
  cells 
  between 
  veins 
  Ma 
  and 
  Rs 
  

  

  Mesothemis 
  p. 
  527 
  

   gg 
  With 
  two 
  rows 
  of 
  cells 
  for 
  a 
  distance 
  between 
  veins 
  M2 
  and 
  Rs 
  

  

  Micrathyria 
  p. 
  528 
  

  

  dd 
  Sectors 
  of 
  the 
  arculus 
  in 
  the 
  fore 
  wing 
  contiguous, 
  but 
  not 
  completely 
  

  

  fused 
  beyond 
  the 
  point 
  of 
  their 
  departure 
  from 
  the 
  arculus 
  ; 
  radial 
  

  

  sector 
  distiuctly 
  undulate 
  (except 
  in 
  L 
  ad 
  on 
  a) 
  ; 
  triangle 
  of 
  the 
  fore 
  

  

  wing 
  very 
  much 
  elongated 
  posteriorly 
  and 
  narrow 
  and 
  generally 
  

  

  traversed 
  by 
  two 
  or 
  more 
  parallel 
  cross 
  veins, 
  and 
  followed 
  by 
  three 
  

  

  to 
  seven 
  rows 
  of 
  cells 
  

  

  e 
  Vein 
  Mia 
  arising 
  under 
  the 
  proximal 
  fourth 
  of 
  the 
  stigma; 
  fore 
  wings 
  

  

  with 
  the 
  subtriangle 
  consisting 
  of 
  three 
  cells, 
  and 
  the 
  triangle 
  

  

  followed 
  by 
  three 
  rows 
  of 
  cells 
  Ladona 
  p. 
  528 
  

  

  ee 
  Vein 
  Mia 
  arising 
  under 
  the 
  middle 
  of 
  the 
  stigma 
  ; 
  fore 
  wings 
  with 
  the 
  

   subtriangle 
  consisting 
  of 
  four 
  to 
  11 
  cells, 
  and 
  the 
  triangle 
  usually 
  

   followed 
  by 
  four 
  to 
  six 
  rows 
  of 
  cells 
  

  

  