﻿440 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  The 
  superiors 
  are 
  well 
  enough 
  (and 
  in 
  these 
  the 
  chief 
  distinctions 
  between 
  

   this 
  species 
  and 
  O. 
  carolinus 
  Hagen 
  lie), 
  but 
  the 
  inferior 
  is 
  incorrect. 
  

   It 
  is 
  shrunken 
  in 
  the 
  type 
  from 
  which 
  the 
  figure 
  was 
  drawn 
  ; 
  it 
  should 
  be 
  

   shown 
  almost 
  exactly 
  as 
  in 
  O. 
  carolinus, 
  which 
  is 
  correctly 
  repre- 
  

   sented 
  in 
  fig. 
  8 
  and 
  17 
  of 
  the 
  same 
  plate. 
  Mature 
  specimens 
  show 
  also 
  

   a 
  deep 
  green 
  color 
  on 
  the 
  thorax, 
  and 
  often, 
  the 
  humeral 
  and 
  antehumeral 
  

   stripes 
  of 
  blackish 
  brown 
  entirely 
  separated 
  at 
  their 
  upper 
  ends. 
  

  

  The 
  cast 
  skin, 
  pinned 
  with 
  the 
  type, 
  is 
  not 
  in 
  fit 
  condition 
  for 
  descrip- 
  

   tion, 
  and 
  the 
  nymph 
  is 
  therefore 
  practically 
  unknown. 
  

  

  HAGENIUS 
  

  

  There 
  is 
  a 
  single 
  North 
  American 
  species. 
  

  

  Hagenius 
  brevistylus 
  Selys 
  

  

  1854 
  Hagenius 
  brevistylus 
  Selys, 
  Acad. 
  Belg. 
  (2) 
  3aL 
  21 
  : 
  82 
  

   1861 
  Hagenius 
  brevistylus 
  Hagen, 
  Synopsis 
  Nenr. 
  N. 
  Am. 
  p. 
  114 
  

   1890 
  Hagenius 
  brevistylus 
  Kirby, 
  Cat. 
  Neur. 
  Odon. 
  p. 
  75 
  (bibliography) 
  

   1890 
  Hagenius 
  brevistylus 
  Beutenmiiller, 
  Dragon 
  flies 
  vs 
  mosquitos. 
  

   p. 
  163 
  (listed 
  from 
  vicinity 
  of 
  New 
  York) 
  

  

  1892 
  Hagenius 
  brevistylus 
  B^nks, 
  Am. 
  ent. 
  soc. 
  Traus. 
  19; 
  352 
  (listed) 
  

  

  1893 
  Hagenius 
  brevistylus 
  Calvert, 
  Am. 
  ent, 
  soc. 
  Trans. 
  20:241 
  (de- 
  

  

  scription) 
  

  

  1894 
  Hagenius 
  brevistylus 
  Banks, 
  Can. 
  ent. 
  26 
  : 
  77 
  (listed 
  from 
  Ithaca) 
  

  

  1895 
  Hagenius 
  brevistylus 
  Calvert, 
  N. 
  Y. 
  ent. 
  soc. 
  Jour. 
  3 
  ; 
  44 
  (review 
  

  

  of 
  lists) 
  

  

  1899 
  Ha<jenius 
  brevistylus 
  Kellicott, 
  Odon. 
  Ohio, 
  p. 
  52-53 
  (good 
  de- 
  

  

  scription) 
  

  

  1900 
  Hag 
  eni 
  lis 
  brevistylus 
  Williamson, 
  Dragon 
  flies 
  Ind. 
  p. 
  282-83 
  

  

  (good 
  description) 
  

  

  Nymph 
  

  

  1872 
  Hagenius 
  brevistylus 
  Cabot, 
  Immature 
  state 
  Odon. 
  pt 
  2, 
  p. 
  9, 
  pi. 
  3, 
  

  

  fig. 
  4 
  

   1885 
  Hagenius 
  brevistylus 
  Hagen, 
  Am. 
  ent. 
  soc. 
  Trans. 
  72 
  : 
  279-80 
  

  

  (very 
  full 
  description) 
  

   1897 
  Hagenius 
  brevistylus 
  Needham, 
  Can. 
  ent. 
  29:168 
  (characters 
  

  

  stated 
  in 
  table 
  for 
  gomphine 
  nymphs) 
  

  

  This 
  big 
  species 
  frequents 
  clear 
  streams, 
  and 
  is 
  common 
  throughout 
  New 
  

   York 
  state. 
  It 
  is 
  very 
  striking 
  as 
  an 
  adult 
  on 
  account 
  of 
  its 
  great 
  size 
  and 
  

   black 
  color, 
  and 
  its 
  nymph 
  (pi. 
  18, 
  fig. 
  7) 
  is 
  a 
  most 
  grotesque 
  creature. 
  

  

  At 
  Saranac 
  Inn 
  the 
  species 
  was 
  common 
  along 
  Little 
  Clear 
  creek.. 
  

   The 
  nymphs 
  were 
  found 
  in 
  the 
  midst 
  of 
  the 
  trash 
  on 
  the 
  bed 
  of 
  the 
  

   stream, 
  and, 
  during 
  the 
  season 
  of 
  transformation, 
  exuviae 
  dotted 
  the 
  

   banks 
  rather 
  conspicuously. 
  Few 
  imagos 
  were 
  seen 
  at 
  large. 
  These 
  fly 
  

   swiftly 
  from 
  one 
  resting 
  place 
  to 
  another 
  about 
  the 
  stream. 
  They 
  are 
  

  

  