Annotated cata log of V ietnamese Tr ichoptera (Insecta)

All 835 valid species of caddis flies recorded from Vietnam by the end of 2021 are cataloged. The catalog is annotated with in for mation about reference to original description where the species was described, type locality, depository in stitution of the type mate rial, habitat where the species has been collected, and distribution. The distribution section covers all countries as well as Vietnamese provinces from where species has been recorded. The catalog is based on records of about 7,600 individuals recorded in literature, of which 69 % of the individuals are males and 31 % are females. With 139 s pecies recorded, the most species rich f amily in Vietnam is the Hydropsychidae, followed by the Philopotamidae, Leptoceridae and the Hydroptilidae. These four families comprise 50% of the species diversity of caddisflies in Vietnam. By number of species, the smallest families are the Phryganopsychidae and Brachycentridae (two species each) and the Sericostomatidae, Phryganeidae and Limnocentropodidae that are represented by only one species each.