﻿Order 
  TRICHOPTERA. 
  

  

  The 
  "caddice" 
  or 
  "case-flies" 
  are 
  so 
  named 
  from 
  the 
  fact 
  that 
  the 
  larvae 
  

   make 
  cases 
  or 
  tubes 
  of 
  stones, 
  sticks 
  or 
  other 
  fragments 
  of 
  vegetable, 
  

   animal 
  or 
  mineral 
  matter 
  among 
  which 
  they 
  live. 
  They 
  are 
  aquatic, 
  

   resemble 
  caterpillars 
  in 
  shape, 
  but 
  have 
  the 
  thoracic 
  legs 
  very 
  long, 
  the 
  

   others 
  very 
  short 
  or 
  obsolete, 
  and 
  the 
  hind 
  body 
  soft 
  because 
  of 
  the 
  pro- 
  

   tection 
  afforded 
  by 
  the 
  case. 
  Usually 
  they 
  frequent 
  running 
  brooks, 
  

   streams 
  or 
  ditches, 
  but 
  some 
  live 
  in 
  water 
  that 
  is 
  sluggish 
  or 
  almost 
  

   stagnant. 
  The 
  adults 
  have 
  a 
  free 
  head 
  with 
  distinct 
  neck, 
  a 
  compact 
  

   thorax, 
  an 
  abdomen 
  without 
  anal 
  appendages, 
  and 
  four 
  net-veined 
  wings, 
  

   the 
  posterior 
  folded 
  under 
  and 
  covered 
  by 
  the 
  anterior. 
  The 
  antennae 
  

   are 
  usually 
  very 
  long, 
  the 
  fore-wings 
  are 
  narrower 
  than 
  the 
  hind-wings, 
  

   often 
  a 
  little 
  thicker 
  in 
  texture 
  and 
  covered 
  with 
  a 
  fine 
  hair, 
  which 
  some- 
  

   times 
  becomes 
  scale-like. 
  The 
  mouth 
  parts 
  are 
  mandibulate 
  in 
  type, 
  but 
  

   are 
  rarely 
  well 
  developed, 
  and 
  in 
  many 
  cases 
  so 
  nearly 
  obsolete 
  as 
  to 
  be 
  

   entirely 
  useless 
  for 
  feeding 
  purposes. 
  They 
  have 
  many 
  resemblances 
  to 
  

   the 
  Lepidoptera, 
  and 
  some 
  of 
  the 
  species 
  of 
  either 
  order 
  may 
  be 
  readily 
  

   taken 
  for 
  members 
  of 
  the 
  other. 
  It 
  is 
  believed 
  that 
  in 
  the 
  Trichoptera 
  we 
  

   have 
  the 
  direct 
  ancestors 
  of 
  the 
  Lepidoptgra. 
  

  

  Fig. 
  

  

  -Caddice-fly 
  cases 
  of 
  varying 
  types. 
  

  

  Collections 
  in 
  this 
  order 
  are 
  not 
  much 
  more 
  complete 
  than 
  they 
  were 
  at 
  

   the 
  time 
  of 
  the 
  previous 
  edition, 
  and 
  comparatively 
  few 
  new 
  species 
  have 
  

   been 
  added. 
  Some 
  of 
  the 
  species 
  added 
  as 
  probabilities 
  have 
  been 
  veri- 
  

   fied, 
  and 
  a 
  very 
  few 
  of 
  these 
  have 
  been 
  omitted 
  as 
  unlikely 
  to 
  occur 
  from 
  

   better 
  knowledge. 
  

  

  (67) 
  

  

  