﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  

  

  559 
  

  

  Larva. 
  Length 
  5.5 
  mm; 
  greatest 
  breadth 
  of 
  body 
  exclusive 
  of 
  

   spines 
  i 
  mm. 
  

  

  Color 
  yellowish 
  to 
  greenish, 
  varying 
  with 
  the 
  color 
  of 
  the 
  sponge, 
  

   obscurely 
  marked 
  with 
  brown 
  ; 
  a 
  middorsal 
  incomplete 
  stripe, 
  darkest 
  on 
  

   the 
  thorax 
  (where 
  also 
  is 
  a 
  lateral 
  one 
  each 
  side), 
  divided 
  and 
  more 
  

   interrupted 
  on 
  the 
  abdomen. 
  

  

  Antennae 
  setaceous, 
  very 
  sharp 
  pointed, 
  a 
  very 
  little 
  longer 
  than 
  the 
  

   piercing 
  mouth 
  parts, 
  15-jointed, 
  the 
  two 
  basal 
  joints 
  turgid, 
  meeting 
  at 
  

   an 
  angle, 
  the 
  other 
  segments 
  narrowly 
  cylindric. 
  

  

  Mouth 
  parts 
  adapted 
  for 
  piercing 
  and 
  sucking 
  the 
  sponge 
  substance 
  ; 
  

   labrum 
  and 
  labium 
  rudimentary; 
  mandibles 
  and 
  maxillae 
  developed 
  as 
  

   long, 
  channeled, 
  decurved 
  stylets, 
  which 
  may 
  be 
  applied 
  in 
  pairs, 
  or 
  all 
  

   four 
  together.^ 
  

  

  Body 
  with 
  two 
  rows 
  each 
  side 
  of 
  dorsum 
  of 
  mostly 
  trifurcate, 
  triseti- 
  

   gerous 
  tubercles 
  ; 
  a 
  pair 
  of 
  simple, 
  unisetigerous 
  tubercles 
  on 
  the 
  ventral 
  

   side 
  of 
  the 
  eighth 
  abdominal 
  segment. 
  loth 
  abdominal 
  segment 
  not 
  

   setigerous; 
  extensile, 
  bearing 
  the 
  spinneret. 
  

  

  Fig. 
  36 
  Labia 
  

  

  a 
  of 
  Climacia 
  dictyona 
  Ndm 
  

   &of 
  Sisyra 
  umbrata 
  Ndm 
  

  

  Very 
  soon 
  after 
  my 
  arrival 
  at 
  Saranac 
  Inn, 
  M. 
  A. 
  Roberts, 
  a 
  careful 
  

   and 
  observant 
  employee 
  of 
  the 
  Adirondack 
  hatchery, 
  called 
  my 
  attention 
  

   to 
  some 
  minute, 
  hemispheric, 
  silken 
  pupa 
  cases, 
  attached 
  to 
  the 
  sides 
  of 
  

   the 
  supply 
  troughs 
  in 
  the 
  hatchery 
  building. 
  There 
  was 
  an 
  outer 
  covering 
  

   of 
  coarse 
  silk 
  (pi. 
  12 
  fig. 
  4, 
  5) 
  woven 
  in 
  hexagonal 
  meshes, 
  like 
  bobbinet 
  ; 
  

  

  1 
  These 
  are 
  cast 
  off, 
  and 
  the 
  normal 
  biting 
  mouth 
  parts 
  developed 
  during 
  metamorphosis. 
  

  

  