Hydroptilidae Stephens, 1836
Plethus acutus Ulmer, 1951
Plethus amogawarsa Schmid, 1958
Plethus baliana (Ulmer, 1951)
Plethus banchaia Olah, 1989
Plethus berbulu Wells, 1993
Plethus bishopi Wells & Huisman, 1993
Plethus bodikatuwa Schmid, 1958
Plethus cilamegha Schmid, 1958
Plethus cruciatus Ulmer, 1951
Plethus cursitans (Hagen, 1859)
Plethus kala Schmid, 1960
Plethus roreta Olah, 1989
Plethus segitiga Wells & Huisman, 1993
Plethus sigiama Olah, 1989
Plethus toana Olah, 1989
Plethus udawasadenna Schmid, 1958
Plethus vajrabodhi Schmid, 1958
