CONTENTS 



Page 



INTRODUCTION 1 



BIOLOGY 1 



Life Cycle. — ^Eggs and Oviposition. — Larval Habits. — Adult Habits. — -Parasitism. 



HABITAT PREFERENCE 5 



Typical Large Rivers. — Unusual Large Rivers. — ^Tributary Streams. — -Ozark Hills 

 Streams. — Unusual Small Streams. — Lake Michigan. — Smaller Glacial Lakes. — 

 Dead River Marsh. 



DISTRIBUTION 12 



Ranges Centered in Illinois. — Ranges Projecting Into Illinois. — Summary. 



COLLECTING AND PRESERVING 15 



Adult Collecting. — Collecting Larvae and Pupae. — ^Rearing Methods. — -PreservatiGn. — 

 Clearing Technique. 



CLASSIFICATION 18 



Family Groupings. — Generic and Specific Characters. — Terminology. — -Material Stud- 

 ied. — ^Disposition of Material. — Records Outside Illinois. 



Key to Families 22 



Rhyacophilidae 30 



Philopotamidae 44 



psychomyiidae 51 



Hydropsychidae 76 



Hydroptilidae 117 



Phryganeidae 161 



Limnephilidae 176 



Molannidae 205 



Beraeidae 208 



Odontoceridae 209 



Calamoceratidae 209 



Leptoceridae 209 



goeridae 256 



Lepidostomatidae 258 



Brachycentridae 260 



Sericostomatidae 266 



Helicopsychidae 266 



EXTRALIMITAL TRICHOPTERA 268 



CHECK LIST OF NEARCTIC TRICHOPTERA 291 



LITERATURE CITED 305 



INDEX 313 



