﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  57I 
  

  

  SERICOSXOIVI-AL'riDAE 
  

  

  I 
  

  

  One 
  specimen 
  taken 
  from 
  hatchery 
  trough 
  June 
  19, 
  1900. 
  

  

  Case. 
  Cyhndric 
  yellow 
  case 
  slightly 
  curved, 
  composed 
  mainly 
  of 
  

   silk 
  with 
  multitudes 
  of 
  spicules 
  of 
  fresh-water 
  sponge. 
  Length 
  10 
  mm. 
  

   Width 
  tapers 
  from 
  3 
  at 
  the 
  anterior 
  end 
  to 
  2 
  mm. 
  at 
  the 
  posterior 
  end. 
  

  

  Larva. 
  Length 
  8 
  mm. 
  Width 
  1.5 
  mm. 
  Head 
  and 
  thorax 
  hght 
  

   yellow. 
  Lines 
  of 
  black 
  chitin 
  over 
  each 
  side 
  of 
  the 
  mesothorax 
  and 
  also 
  

   on 
  the 
  dorsal 
  side 
  of 
  the 
  first 
  segment, 
  extending 
  obliquely 
  over 
  the 
  lower 
  

   tubercles. 
  Numerous 
  respiratory 
  filaments 
  occur 
  on 
  the 
  second, 
  third, 
  

   fourth, 
  fifth, 
  sixth 
  and 
  seventh 
  segments 
  both 
  above 
  and 
  below. 
  The 
  

   anal 
  hooks 
  are 
  supported 
  on 
  two-jointed 
  prologs. 
  

  

  2 
  

  

  One 
  specimen 
  taken 
  from 
  hatchery 
  trough 
  June 
  19, 
  1900. 
  

  

  Case. 
  Length 
  8 
  mm. 
  Tapers 
  from 
  3 
  to 
  i 
  mm. 
  in 
  diameter. 
  Com- 
  

   posed 
  of 
  small 
  pieces 
  of 
  wood 
  or 
  bark 
  and 
  is 
  of 
  a 
  straight 
  cylindnc 
  shape. 
  

  

  Larva. 
  Length 
  7 
  mm. 
  Width 
  i 
  mm. 
  Head 
  and 
  prothorax 
  yellow- 
  

   ish 
  brown 
  with 
  numerous 
  lighter 
  dots. 
  Mesothorax 
  and 
  metathorax 
  

   white. 
  A 
  black 
  line 
  curved 
  outward 
  is 
  on 
  each 
  half 
  of 
  the 
  dorsal 
  side 
  

   of 
  the 
  mesothorax. 
  Black 
  line 
  on 
  margin 
  of 
  each 
  coxa. 
  In 
  case 
  of 
  

   the 
  second 
  and 
  third 
  pairs 
  of 
  legs 
  this 
  line 
  extends 
  nearly 
  to 
  the 
  

   rear 
  margin 
  of 
  the 
  mesothorax 
  and 
  metathorax. 
  Abdomen 
  white. 
  On 
  

   the 
  first 
  abdominal 
  segment 
  a 
  black 
  line 
  runs 
  from 
  the 
  rear 
  of 
  the 
  seg- 
  

   ment 
  downward 
  to 
  the 
  top 
  of 
  the 
  lower 
  tubercles. 
  Numerous 
  small 
  fila- 
  

   ments 
  occur 
  on 
  the 
  second, 
  third, 
  fourth, 
  fifth, 
  sixth 
  and 
  seventh 
  seg- 
  

   ments 
  on 
  both 
  dorsal 
  and 
  ventral 
  sides. 
  The 
  two 
  two-jointed 
  prolegs 
  

   each 
  supports 
  a 
  single 
  large 
  hook 
  with 
  a 
  smaller 
  one 
  at 
  its 
  base. 
  

  

  LB 
  F»XOCERID 
  AE 
  

   I 
  

  

  One 
  specimen 
  taken 
  June 
  19, 
  1900. 
  

  

  Case. 
  Cylindric 
  case 
  of 
  bark 
  slightly 
  curved. 
  Length 
  11 
  mm. 
  

   Width 
  I 
  mm. 
  A 
  slender 
  piece 
  of 
  light 
  colored 
  wood 
  is 
  fastened 
  along 
  

   one 
  edge, 
  extending 
  two 
  or 
  three 
  mm 
  beyond 
  the 
  case 
  at 
  each 
  end, 
  and 
  a 
  

   rectangular 
  piece 
  of 
  wood 
  is 
  fastened 
  to 
  the 
  case 
  at 
  the 
  rear 
  end 
  on 
  

   the 
  side 
  opposite 
  the 
  slender 
  stick. 
  

  

  