﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  467 
  

  

  marks 
  on 
  the 
  lateral 
  margins 
  of 
  the 
  abdominal 
  segments 
  at 
  base 
  ; 
  a 
  broad 
  

   middorsal 
  pale 
  band 
  on 
  abdomen, 
  mottled 
  with 
  brown, 
  and 
  including 
  

   two 
  blackish 
  spots 
  on 
  the 
  eighth 
  segment; 
  appendages, 
  spines, 
  tarsal 
  seg- 
  

   ments 
  and 
  claws, 
  yellow, 
  blacktipped. 
  

  

  Head 
  with 
  very 
  prominent, 
  anteriorly 
  directed 
  eyes, 
  narrowed 
  behind 
  

   the 
  eyes 
  to 
  very 
  sharp 
  hind 
  angles 
  ; 
  between 
  these 
  angles 
  the 
  rear 
  of 
  the 
  

   head 
  is 
  slightly 
  concave; 
  the 
  labium 
  has 
  its 
  median 
  lobe 
  prominent, 
  

   fringed, 
  distinctly 
  cleft; 
  the 
  lateral 
  lobe, 
  rather 
  small, 
  tapering 
  to 
  its 
  

   incurved 
  apex, 
  rather 
  regularly. 
  

  

  Abdomen 
  without 
  dorsal 
  hooks, 
  with 
  lateral 
  spines 
  on 
  segments 
  3 
  or 
  

   4-9, 
  increasing 
  in 
  size 
  posteriorly, 
  those 
  of 
  the 
  ninth 
  segment 
  about 
  equal- 
  

   ing 
  in 
  length 
  the 
  loth 
  segment; 
  inferior 
  appendages 
  long 
  and 
  very 
  sharp, 
  

   distinctly 
  longer 
  than 
  the 
  last 
  two 
  abdominal 
  segments; 
  superior 
  one 
  half 
  

   to 
  three 
  fifths 
  as 
  long 
  as 
  the 
  inferiors, 
  its 
  apex 
  with 
  a 
  round 
  notch; 
  later- 
  

   als 
  about 
  half 
  as 
  long 
  as 
  the 
  superior. 
  

  

  The 
  unusual 
  brevity 
  of 
  the 
  superior 
  appendage 
  is 
  about 
  as 
  distinctive 
  

   as 
  the 
  shape 
  of 
  the 
  lateral 
  labial 
  lobe, 
  indicated 
  in 
  the 
  above 
  table, 
  

  

  NASIAESCHNA^ 
  

  

  There 
  is 
  a 
  single 
  species. 
  

  

  Nasiaeschna 
  pentacantha 
  Rambur 
  

  

  1842 
  Aeschna 
  pentacantha 
  Rambur, 
  Ins. 
  Neur. 
  p. 
  208 
  

  

  1861 
  Aeschna 
  pentacantha 
  Hageu, 
  Synopsis 
  Near. 
  N. 
  Am. 
  p. 
  129 
  (de- 
  

  

  scription) 
  

  

  1862 
  Aeschna 
  pentacantha 
  Walsh, 
  Acad. 
  nat. 
  sci. 
  Phil. 
  p. 
  397 
  (notes) 
  

   1875 
  Aeschna 
  pentacantlia 
  Hagen, 
  Best. 
  soc. 
  nat. 
  Iiist. 
  Proc. 
  18 
  : 
  37 
  

  

  (bibliography 
  and 
  distribution) 
  

  

  1888 
  Epiaeschna 
  heros 
  (nymph) 
  Garman, 
  111. 
  state 
  lab. 
  nat. 
  hist. 
  Bui. 
  3: 
  178 
  

   (descriptive 
  notes) 
  

  

  1895 
  Aeschna 
  pentacantha 
  Bauks, 
  Ent. 
  news, 
  6:124 
  (recorded 
  from 
  

   Baldwinsville) 
  

  

  1897 
  Aeschna 
  pentacantha 
  Calvert, 
  N. 
  Y. 
  ent. 
  soc. 
  Jour. 
  5:95 
  (recorded 
  

   from 
  Baldwinsville) 
  

  

  1900 
  Aeschna 
  pentacantha 
  Williamsou, 
  Dragon 
  flies 
  Ind, 
  p. 
  305 
  (descrip- 
  

   tion) 
  

  

  This 
  species 
  ranges 
  from 
  Massachusetts 
  to 
  Texas, 
  and 
  from 
  Illinois 
  to 
  

   Georgia 
  : 
  it 
  is 
  apparently 
  rare 
  throughout 
  its 
  range. 
  Probably 
  not 
  more 
  

   than 
  a 
  dozen 
  specimens 
  of 
  the 
  adult 
  insect 
  exist 
  in 
  collections. 
  

  

  As 
  to 
  the 
  nymph, 
  Garman 
  first 
  found 
  it 
  in 
  the 
  Mississippi 
  bottoms 
  near 
  

   Quincy 
  III. 
  His 
  types 
  were 
  lent 
  me 
  for 
  study 
  several 
  years 
  ago 
  by 
  

   Prof. 
  Forbes. 
  I 
  was 
  able 
  to 
  refer 
  them 
  by 
  exclusion 
  to 
  this 
  species. 
  Mr 
  

   Hart 
  of 
  the 
  Illinois 
  state 
  laboratory, 
  has 
  since 
  written 
  me 
  that 
  he 
  has 
  suc- 
  

   cessfully 
  reared 
  similar 
  nymphs 
  obtained 
  by 
  him 
  in 
  a 
  creek 
  near 
  Cham- 
  

   paign 
  111. 
  Thus 
  their 
  identity 
  is 
  settled. 
  I 
  have 
  since 
  obtained 
  well 
  

  

  1 
  de 
  Selys 
  1900: 
  diagnosis 
  in 
  French, 
  included 
  in 
  a 
  paper 
  "Odonaten 
  aus 
  Neu-Guinea" 
  by 
  F. 
  

   Forster, 
  in 
  Termeszetrajzi 
  Fiizetek, 
  v. 
  23 
  (Budapest). 
  

  

  