﻿420 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  ce 
  Head 
  with 
  a 
  frontal 
  prominence 
  j 
  gill 
  rudiment 
  on 
  the 
  first 
  abdominal 
  

   segment 
  bifurcated, 
  shaped 
  like 
  a 
  tuning 
  fork 
  

   d 
  Frontal 
  prominence 
  rounded 
  ; 
  the 
  flattened 
  fore 
  tibia 
  with 
  a 
  broad, 
  

   rounded 
  lobe 
  at 
  its 
  apex, 
  close 
  behind 
  the 
  apical 
  burrowing 
  hook 
  

  

  H 
  exagenia 
  

  

  dd 
  Frontal 
  prominence 
  bi 
  spinous 
  ; 
  no 
  conspicuous 
  lobe 
  at 
  the 
  apex 
  of 
  

  

  the 
  fore 
  tibia 
  behind 
  the 
  apical 
  burrowing 
  hoolj... 
  Ephemera- 
  

  

  I 
  describe 
  below 
  the 
  nymphs 
  of 
  seven 
  species 
  of 
  May 
  flies, 
  repre- 
  

   senting 
  as 
  many 
  genera, 
  bred 
  at 
  Saranac 
  Inn. 
  The 
  only 
  bred 
  Nortb 
  

   American 
  nymph 
  of 
  which 
  I 
  find 
  description 
  is 
  the 
  singular 
  B 
  a 
  e 
  t 
  i 
  s 
  c 
  a 
  

   o 
  b 
  e 
  s 
  a 
  Say, 
  which 
  is 
  figured 
  by 
  Walsh, 
  Vaysseire 
  and 
  Eaton. 
  A 
  number 
  

   of 
  undetermined 
  American 
  nymphs, 
  mostly 
  from 
  the 
  Cambridge 
  museum, 
  

   of 
  comparative 
  zoology, 
  are 
  figured 
  and 
  described 
  in 
  Eaton's 
  monograph. 
  

   One 
  of 
  these 
  I 
  have 
  been 
  able 
  to 
  identify 
  as 
  Ephemerella 
  

   excrucians, 
  described 
  below. 
  

  

  Heptagenia 
  pulchella 
  Walsh 
  

  

  Plate 
  15, 
  ngure 
  15 
  

  

  1862 
  Palingenia 
  pulchella 
  Walsh, 
  Acad. 
  nat. 
  sei. 
  Phil. 
  Proc. 
  p. 
  375- 
  

  

  (original 
  description) 
  

  

  1863 
  Palingenia 
  pulchella 
  Hagen, 
  Ent. 
  soc. 
  Phil. 
  Proc. 
  2:177 
  (note) 
  

   1863 
  Palingenia 
  pulchella 
  Walsh, 
  Ent. 
  soc. 
  Phil. 
  Proc. 
  2:203 
  (note) 
  

   1863 
  Heptagenia 
  pulchella 
  Walsh, 
  Ent. 
  soc. 
  Phil. 
  Proc. 
  2:204 
  (merely 
  

  

  refers 
  it 
  to 
  Heptagenia) 
  

  

  1871 
  Heptagenia 
  pulchella 
  Eaton, 
  Ent. 
  soc. 
  Lond. 
  Trans, 
  p. 
  141 
  (de- 
  

   scription 
  in 
  Latin 
  from 
  the 
  original 
  by 
  Walsh) 
  

  

  1885 
  Heptagenia 
  pulchella 
  Eaton, 
  Linn. 
  soc. 
  Loud. 
  Trans. 
  (2) 
  3:299 
  (a, 
  

   very 
  full 
  description) 
  

  

  1892 
  Heptagenia 
  pulchella 
  Banks, 
  Am. 
  ent. 
  soc. 
  Trans. 
  19:347 
  (listed) 
  

  

  Images 
  of 
  this 
  species 
  were 
  common 
  in 
  the 
  hatchery 
  windows 
  through- 
  

   out 
  our 
  session, 
  and 
  during 
  the 
  month 
  of 
  June 
  were 
  most 
  abundant 
  

   there. 
  A 
  few, 
  mostly 
  males, 
  were 
  taken 
  regularly 
  in 
  the 
  trap 
  lanterns 
  

   when 
  the 
  weather 
  was 
  favorable. 
  A 
  few 
  others 
  were 
  seen, 
  flying 
  in 
  the 
  

   twilight. 
  The 
  species 
  was 
  little 
  in 
  evidence, 
  common 
  as 
  it 
  was. 
  

  

  The 
  nymphs 
  were 
  abundant 
  in 
  Little 
  Clear 
  creek, 
  specially 
  in 
  the 
  

   more 
  rapid 
  places, 
  clinging 
  closely 
  to 
  flat 
  surfaces 
  of 
  boards, 
  sticks^ 
  

   stones, 
  etc. 
  To 
  collect 
  them 
  one 
  needed 
  but 
  to 
  lift 
  these 
  obstructions 
  

   from 
  the 
  stream 
  and 
  pick 
  the 
  nymphs 
  from 
  them 
  with 
  forceps. 
  Within 
  a 
  

   few 
  days 
  after 
  our 
  arrival 
  we 
  had 
  reared 
  some 
  of 
  the 
  nymphs, 
  and 
  others 
  

   were 
  reared 
  repeatedly 
  after 
  that. 
  Oviposition 
  was 
  not 
  observed. 
  I 
  

   dissected 
  a 
  female 
  subimago, 
  and 
  counted 
  the 
  eggs 
  in 
  her 
  ovaries 
  in 
  part, 
  

   and, 
  on 
  the 
  basis 
  of 
  this 
  count, 
  estimated 
  the 
  whole 
  number 
  at 
  about 
  

   1340. 
  linages 
  and 
  subimagos 
  thrown 
  on 
  the 
  surface 
  of 
  the 
  fish 
  ponds. 
  

  

  