﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  44! 
  

  

  easy 
  to 
  approach 
  and 
  proved 
  not 
  very 
  difficult 
  to 
  capture 
  with 
  a 
  net, 
  when 
  

   resting 
  on 
  the 
  bridges 
  crossing 
  the 
  stream. 
  

  

  The 
  eggs 
  are 
  dropped 
  by 
  the 
  female 
  during 
  flight. 
  She 
  descends 
  and 
  

   strikes 
  the 
  water 
  repeatedly, 
  at 
  points 
  wide 
  apart: 
  10 
  to 
  20 
  eggs 
  are 
  

   Hberated 
  at 
  each 
  descent. 
  Thus 
  they 
  are 
  well 
  distributed. 
  Each 
  egg 
  

   (pi. 
  19, 
  fig. 
  2) 
  is 
  somewhat 
  spindle 
  formed 
  in 
  outline 
  with 
  rounded 
  ends, 
  

   at 
  first 
  of 
  whitish 
  color, 
  becoming 
  yellowish 
  after 
  a 
  few 
  hours. 
  The 
  

   ovaries 
  of 
  a 
  teneral 
  female 
  from 
  a 
  breeding 
  cage 
  contained 
  no 
  eggs 
  that 
  

   were 
  nearly 
  mature 
  ; 
  a 
  considerable 
  time 
  must 
  elapse 
  after 
  transformation 
  

   before 
  oviposition 
  can 
  take 
  place. 
  

  

  Nymphs 
  of 
  various 
  sizes 
  are 
  always 
  found 
  together. 
  These 
  sizes 
  fall 
  

   into 
  three 
  or 
  more 
  possible 
  groups 
  of 
  sizes, 
  which 
  may 
  indicate 
  a 
  

   developmental 
  period 
  of 
  four 
  or 
  more 
  years 
  duration. 
  In 
  other 
  

   localities 
  I 
  have 
  observed 
  that 
  the 
  nymphs 
  are 
  likely 
  to 
  be 
  found 
  about 
  

   the 
  deep 
  holes 
  in 
  the 
  creek 
  bed, 
  under 
  lodged 
  driftwood, 
  etc.; 
  but 
  in 
  

   Little 
  Clear 
  creek 
  they 
  were 
  found 
  everywhere. 
  Even 
  in 
  the 
  shallow 
  

   fish 
  ponds 
  made 
  by 
  impounding 
  the 
  creek 
  they 
  were 
  so 
  common 
  on 
  the 
  

   bottom 
  that 
  one 
  or 
  more 
  could 
  be 
  taken 
  anywhere 
  at 
  almost 
  every 
  haul 
  

   of 
  the 
  sieve 
  net. 
  11 
  exuviae 
  were 
  picked 
  from 
  the 
  boarded 
  side 
  of 
  one 
  

   of 
  the 
  ponds 
  in 
  a 
  distance 
  of 
  20 
  yards. 
  

  

  The 
  nymph 
  has 
  been 
  well 
  described 
  by 
  Hagen 
  and 
  figured 
  by 
  Cabot 
  

   (//. 
  cc). 
  There 
  is 
  no 
  need 
  of 
  repeating 
  the 
  description 
  here, 
  since 
  it 
  

   will 
  be 
  at 
  once 
  recognized 
  by 
  plate 
  18, 
  figure 
  7, 
  and 
  by 
  the 
  characters 
  

   given 
  in 
  the 
  table. 
  

  

  LANTHUS 
  

  

  This 
  genus 
  includes 
  the 
  smallest 
  and 
  the 
  daintiest 
  of 
  our 
  Gomphinae, 
  

   black 
  species, 
  striped 
  with 
  green. 
  Its 
  two 
  species 
  probably 
  both 
  occur 
  

   within 
  the 
  state 
  of 
  New 
  York, 
  though 
  but 
  one 
  of 
  them, 
  L. 
  parvulus, 
  

   has 
  been 
  recorded 
  for 
  the 
  state 
  hitherto. 
  They 
  may 
  be 
  easily 
  distin- 
  

   guished 
  as 
  follows. 
  

  

  Abdomiual 
  appendages 
  black 
  parvulua 
  

  

  Abdominal 
  appendages 
  yellow 
  or 
  wbitisb 
  albistylus 
  

  

  Lanthus 
  parvulus 
  Selys 
  

  

  1854 
  Gomphus 
  parvulus 
  Selys, 
  Acad. 
  Belg. 
  (2) 
  Bui. 
  21 
  : 
  56 
  

   1857 
  Gompbus 
  parvulus 
  Selys, 
  Monograpbie 
  des 
  Gompbinae, 
  p. 
  157 
  

   1861 
  Gomphus 
  parvulus 
  Ilagen, 
  Synopis 
  Neur. 
  N. 
  Am. 
  p. 
  109 
  

   1890 
  Aesbna 
  parvula 
  Kirby, 
  Cat. 
  Neur. 
  Odon. 
  p. 
  65 
  (bibliograpby) 
  

  

  1892 
  Gomphus 
  parvulus 
  Banks, 
  Am. 
  ent. 
  soc. 
  Trans. 
  19 
  : 
  352 
  (listed) 
  

  

  1893 
  Gompbus 
  parvulus 
  Calvert, 
  Am. 
  ent. 
  soc. 
  Trans. 
  20:242 
  (descrip- 
  

  

  tion) 
  

  

  