﻿556 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  S. 
  umbra 
  t 
  a 
  the 
  last 
  joint 
  of 
  both 
  palpi 
  is 
  distinctly 
  pediform 
  (fig. 
  

   34, 
  ^6) 
  ; 
  I 
  have 
  not 
  been 
  able 
  to 
  examine 
  tlie 
  palpi 
  with 
  any 
  degree 
  of 
  

   satisfaction 
  in 
  any 
  specimen 
  of 
  S. 
  fuscata, 
  but 
  according 
  to 
  VVes- 
  

   mael's 
  figure^ 
  the 
  terminal 
  segment 
  should 
  be 
  simply 
  conic. 
  

  

  During 
  the 
  first 
  week 
  of 
  our 
  stay 
  at 
  Saranac 
  Inn 
  we 
  scraped 
  the 
  surface 
  

   water 
  supply 
  trough 
  in 
  the 
  hatchery, 
  and 
  in 
  the 
  scrapings 
  found 
  about 
  

   IOC 
  small 
  fresh-water 
  sponges. 
  A 
  few 
  of 
  the 
  larvae 
  of 
  this 
  species 
  were 
  

   found 
  on 
  the 
  sponges. 
  Shortly 
  the 
  cocoons 
  began 
  to 
  appear 
  on 
  the 
  sides 
  

   of 
  the 
  supply 
  trough, 
  and 
  in 
  such 
  numbers 
  that 
  it 
  was 
  evident 
  that 
  the 
  

   larvae 
  were 
  coming 
  in 
  from 
  the 
  pipes. 
  The 
  cocoons 
  were 
  located, 
  some 
  

   inside 
  the 
  supply 
  troughs 
  on 
  the 
  smooth, 
  tarred, 
  vertical 
  sides 
  just 
  above 
  

   the 
  water, 
  some 
  on 
  the 
  upper 
  edges, 
  some 
  on 
  the 
  sides 
  and 
  edges 
  of 
  the 
  

  

  hatching 
  troughs 
  below, 
  but 
  

   mostly 
  on 
  the 
  outside 
  of 
  the 
  

   supply 
  troughs 
  and 
  in 
  the 
  

   angles 
  which 
  they 
  make 
  with 
  

   the 
  hatching 
  troughs, 
  or 
  in 
  

   the 
  thread 
  grooves 
  at 
  the 
  base 
  

   of 
  the 
  faucets. 
  Each 
  larva 
  

   spins 
  over 
  itself, 
  a 
  hemispheric 
  

   cover 
  of 
  close 
  woven 
  silk 
  (pi. 
  

   12, 
  fig. 
  ii), 
  attached 
  by 
  its 
  

   edges 
  to 
  the 
  supporting 
  sur- 
  

   face, 
  and 
  a 
  complete 
  inner 
  co- 
  

   coon 
  of 
  considerably 
  smaller 
  

   size, 
  likewise 
  close 
  woven. 
  

  

  Larvae 
  of 
  this 
  species 
  taken 
  

   from 
  unfinished 
  cocoons 
  and 
  

   placed 
  in 
  a 
  vial 
  spun 
  new 
  co- 
  

   coons 
  in 
  the 
  corners 
  of 
  it 
  

   under 
  observation. 
  It 
  was 
  

   interesting 
  to 
  watch 
  them 
  

   weaving 
  back 
  and 
  forth 
  their 
  

   anal 
  spinnerets, 
  as 
  the 
  threads 
  

   were 
  laid 
  down. 
  

  

  Two 
  larvae 
  of 
  this 
  species, 
  taken 
  just 
  as 
  they 
  were 
  leaving 
  the 
  water 
  

   June 
  21 
  and 
  placed 
  in 
  a 
  vial 
  plugged 
  with 
  cotton, 
  spent 
  at 
  least 
  12 
  hours 
  

   in 
  spinning 
  their 
  cover 
  and 
  cocoon, 
  and 
  remained 
  inactive 
  larvae 
  24 
  

   hours 
  longer. 
  Then 
  they 
  transformed 
  to 
  pupae, 
  which 
  remained 
  suffi- 
  

  

  Fig. 
  34 
  Maxillae: 
  

  

  aot 
  Climacia 
  dictyona 
  Ndm. 
  

   6of 
  Sisyra 
  umbrata 
  Ndm. 
  

  

  1 
  Acad. 
  Brux. 
  Bui. 
  1840. 
  v. 
  7, 
  fig. 
  3 
  of 
  plate. 
  

  

  