﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  429 
  

  

  Ephemera 
  varia 
  Eaton 
  

  

  Plate 
  11, 
  figures 
  3, 
  4 
  

  

  1861 
  Ephemera 
  decora 
  Hagen, 
  Synopsis 
  Neur. 
  N. 
  Am. 
  p. 
  38 
  (d 
  e 
  c 
  o 
  r 
  a 
  was 
  

  

  Walker's 
  name 
  for 
  another 
  species) 
  

   1875 
  Ephemera 
  decora 
  Hagen, 
  Rep't 
  U. 
  S. 
  geol. 
  sur. 
  terr. 
  for 
  1873 
  ; 
  p. 
  578 
  

   1885 
  Ephemera 
  varia 
  Eaton, 
  Linn. 
  soc. 
  Lond. 
  Trans. 
  (2) 
  3:69-70, 
  pi. 
  63, 
  

  

  fig. 
  12h 
  

   1892 
  Ephemera 
  decora 
  Banks, 
  Am. 
  ent. 
  soc. 
  Trans. 
  19:345 
  (listed) 
  

  

  This 
  dainty 
  New 
  England 
  species 
  was 
  common 
  about 
  Little 
  Clear 
  

   creek, 
  associated 
  with 
  the 
  preceding 
  species, 
  with 
  which 
  it 
  agrees 
  quite 
  

   closely 
  in 
  habits. 
  Imagos, 
  while 
  not 
  sought 
  outside 
  our 
  cages, 
  were 
  

   often 
  seen 
  sitting 
  lightly 
  on 
  the 
  bushes 
  near 
  the 
  banks 
  of 
  the 
  creek. 
  The 
  

   nymphs 
  were 
  abundant 
  in 
  the 
  bed 
  of 
  the 
  creek 
  till 
  the 
  first 
  of 
  August. 
  

  

  Nymph. 
  PI 
  n. 
  fig. 
  i, 
  2 
  Length 
  of 
  body 
  18 
  mm; 
  setae 
  8 
  mm 
  addi- 
  

   tional 
  ; 
  abdomen 
  11 
  mm; 
  antennae 
  4.5 
  mm. 
  

  

  Color 
  yellowish 
  ; 
  abdomen 
  with 
  a 
  pair 
  of 
  submedian, 
  longitudinal, 
  

   brown 
  streaks, 
  laid 
  on 
  yellow 
  ones, 
  which 
  they 
  divide. 
  

   !r^ 
  Antennae 
  sparsely 
  hairy, 
  much 
  surpassing 
  tlie 
  tips 
  of 
  the 
  tarsi. 
  Man- 
  

   dibular 
  tusks, 
  approximate, 
  slender, 
  bare, 
  gently 
  up 
  curved 
  and 
  divergent 
  

   at 
  the 
  tips 
  ; 
  femora 
  and 
  tibiae 
  moderately 
  dilated 
  and 
  bearing 
  on 
  their 
  

   flattened 
  edges 
  copious 
  fringes 
  of 
  hairs. 
  

  

  Gills 
  as 
  in 
  Hexagenia, 
  but 
  slenderer, 
  and 
  less 
  deeply 
  tinged 
  with 
  

   purple 
  color. 
  

  

  Order 
  ODONATA 
  

  

  Dragon 
  flies 
  

  

  The 
  dragon 
  flies 
  are 
  all 
  aquatic. 
  They 
  frequent 
  fresh 
  water 
  in 
  all 
  sorts 
  

   of 
  situations, 
  and 
  are 
  probably 
  the 
  most 
  important 
  predatory 
  aquatic 
  

   insects. 
  They 
  are 
  strictly 
  carnivorous 
  in 
  all 
  

   stages. 
  The 
  adults 
  feed 
  on 
  a 
  great 
  variety 
  

   of 
  insects, 
  and 
  the 
  larger 
  dragon 
  flies 
  habitu- 
  

   ally 
  eat 
  the 
  smaller 
  ones. 
  The 
  nymphs 
  are 
  

   very 
  voracious, 
  and 
  in 
  many 
  species 
  can- 
  

   nibalistic, 
  the 
  larger 
  nymphs 
  eating 
  the 
  

   smaller 
  ones; 
  but 
  they 
  eat 
  chiefly 
  other 
  

   aquatic 
  insects, 
  worms, 
  crustaceans, 
  fish 
  fry, 
  

   and 
  tadpoles. 
  

  

  The 
  nymphs 
  may 
  be 
  conveniently 
  grouped 
  Fig. 
  e 
  Face 
  of 
  nymph 
  of 
  sympet- 
  

   rumiiiotum 
  Hagen, 
  showing 
  the 
  

   aCCOrdmg 
  to 
  habits 
  as 
  follows, 
  enormous 
  masls 
  shaped 
  labium 
  

  

  a 
  Burrowiug 
  nymphs, 
  with 
  depressed, 
  wedged-shaped 
  heads, 
  abbreviated 
  and 
  

   flattened 
  antennae, 
  approximated 
  forelegs, 
  and 
  external 
  burrowing 
  hooks 
  

   at 
  the 
  ends 
  of 
  the 
  fore 
  and 
  middle 
  tibiae. 
  These 
  burrow 
  along 
  on 
  the 
  bot- 
  

   tom 
  of 
  the 
  pond 
  or 
  stream, 
  just 
  beneath 
  the 
  layer 
  of 
  silt, 
  with 
  the 
  tip 
  of 
  the 
  

   abdomen 
  turned 
  upward 
  and 
  reaching 
  the 
  water 
  for 
  respiration 
  (Gomphinae) 
  

  

  