﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  563 
  

  

  deals 
  chiefly 
  with 
  the 
  cases 
  and 
  the 
  habits 
  of 
  a 
  few 
  species. 
  Two 
  of 
  those 
  

   described 
  by 
  her 
  seem 
  to 
  correspond 
  with 
  two 
  described 
  below, 
  viz, 
  

   Molanna 
  cinerea 
  Hag. 
  and 
  Polycentropus 
  lucidus 
  Hag. 
  

   There 
  have 
  subsequently 
  come 
  to 
  hand 
  the 
  very 
  valuable 
  papers 
  ot 
  

   Prof. 
  Klapalek^ 
  in 
  which 
  the 
  cases, 
  larvae 
  and 
  pupae 
  of 
  53 
  European 
  

   species 
  are 
  described. 
  It 
  is 
  from 
  these 
  papers 
  and 
  from 
  that 
  ot 
  

   Dr 
  Struck^ 
  that 
  the 
  following 
  table 
  for 
  the 
  determination, 
  by 
  famihes, 
  

   of 
  caddis 
  fly 
  larvae 
  has 
  been 
  compiled. 
  The 
  undetermined 
  species 
  herein 
  

   described 
  have 
  been 
  arranged 
  according 
  to 
  this 
  table. 
  I 
  regret 
  exceed- 
  

   ingly 
  that 
  a 
  closer 
  determination 
  has 
  been 
  impossible. 
  The 
  first 
  three 
  

   species 
  discussed 
  below 
  were 
  reared 
  and 
  subsequently 
  determined 
  from 
  

   the 
  adults. 
  The 
  fourth 
  in 
  the 
  list 
  was 
  also 
  reared. 
  Its 
  adult 
  was 
  sent 
  to 
  

   MacLachlan 
  but 
  no 
  report 
  of 
  its 
  identification 
  has 
  yet 
  been 
  received. 
  I 
  

   have 
  found 
  that 
  adult 
  characteristics 
  are 
  sufficiently 
  evident 
  in 
  the 
  pupae 
  

   to 
  admit 
  of 
  determination, 
  to 
  families, 
  by 
  the 
  use 
  of 
  Banks'^ 
  table 
  for 
  

   adults. 
  

  

  For 
  the 
  identification 
  of 
  the 
  adults 
  herein 
  listed, 
  I 
  am 
  largely 
  indebted 
  

   to 
  Mr 
  Nathan 
  Banks 
  of 
  Washington 
  D. 
  C. 
  The 
  drawings 
  of 
  the 
  cases, 
  

   larvae, 
  pupae 
  and 
  adults 
  are 
  all 
  by 
  Mrs 
  J. 
  H. 
  Comstock 
  of 
  Cornell 
  uni- 
  

   versity. 
  I 
  am 
  indebted 
  most 
  of 
  all 
  to 
  Dr 
  J. 
  G. 
  Needhara, 
  under 
  whose 
  

   direction 
  this 
  work 
  has 
  been 
  done. 
  

  

  KEY 
  TO 
  FAMILIES 
  OF 
  CADDIS 
  FLY 
  LARVAE 
  

   a 
  Larva 
  larviform, 
  i. 
  e. 
  with 
  head 
  bent 
  downward 
  at 
  an 
  angle 
  with 
  the 
  body, 
  

   tubercles 
  generally 
  present 
  on 
  the 
  basal 
  abdominal 
  segment, 
  gill 
  filaments, 
  

   when 
  present, 
  simple 
  (except 
  in 
  some 
  Limnophilidae), 
  lateral 
  fringe 
  gener- 
  

   ally 
  present. 
  

   h 
  Hind 
  legs 
  not 
  more.than 
  twice 
  as 
  long 
  as 
  the 
  first 
  pair, 
  

   c 
  Head 
  longitudinally 
  elliptic, 
  at 
  slight 
  angle 
  with 
  the 
  body, 
  pronotum 
  only 
  

   chitinized, 
  abdominal 
  constrictions 
  deep, 
  third 
  pair 
  of 
  legs 
  slightly 
  

   longer 
  than 
  the 
  first. 
  Cases 
  of 
  vegetable 
  matter 
  laid 
  longitudinally 
  

   and 
  forming 
  a 
  spiral, 
  widening 
  at 
  the 
  anterior 
  end...Phry 
  gane 
  i 
  dae 
  

   CO 
  Head 
  oval 
  to 
  ronnd, 
  pronotum 
  chitinized, 
  mesonotum 
  often, 
  metanotum 
  

   seldom 
  chitinized, 
  abdominal 
  constrictions 
  slight. 
  

  

  d 
  Lateral 
  fringe 
  well 
  developed; 
  cases 
  various 
  Limnophilidae 
  

  

  dd 
  Lateral 
  fringe 
  slightly 
  developed, 
  cylindric 
  case 
  of 
  sand 
  or 
  small 
  

  

  stones 
  Sericostomatidae 
  

  

  e 
  Threa 
  tubercles 
  

  

  ^Klapalek 
  Fr. 
  Metamorphose 
  der 
  Triclioptereu, 
  Arcliiv 
  der 
  Naturvvissenschaftl. 
  Landdurch- 
  

   forschung 
  von 
  Bohmen 
  6, 
  Band 
  No. 
  5 
  and 
  Band 
  7, 
  No: 
  6. 
  

  

  2 
  Struck, 
  R. 
  Neue 
  und 
  Alte 
  Trichopteren-Larven-gehause. 
  Illus. 
  Zeits. 
  Ent. 
  Bd 
  4. 
  No. 
  8, 
  10, 
  13, 
  

   17, 
  19, 
  21, 
  22. 
  

  

  3Banks, 
  Nathan. 
  A 
  synopsis, 
  catalogue, 
  and 
  bibliography 
  of 
  the 
  Neuropteroid 
  insects 
  of 
  tem- 
  

   perate 
  North 
  America. 
  Am. 
  ent. 
  soc. 
  Trans. 
  1893. 
  19 
  : 
  333. 
  

  

  