TABLE OF CONTENTS 



Page 



General discussion of family 1-3 



Key to genera 3-4 



Brief discussion of genera - Agraylea, Dlbusa, Ithytrichia, 

 Leucotrlchla, Mayatrlchla, Metrlchla, 

 Orthotrlchla, Paleagapetus, Rloptlla, 



Stactoblella, Zumatrlchla 4-5 



Key to species of above genera 6-9 



Genus Hydroptlla - discussion, key to species 10-21 



Genus Neotrlchla - discussion, key to species 21-24 



Genus Ochrotrlchla - discussion, key to species 24-35 



Genus Oxyethlra - discussion, key to species 35-42 



Literature 43-45 



Check list 46-55 



Plates 56-97 



ii 



