Pseliastis trizona is a species of moth in the family Heliozelidae, described by Edward Meyrick in 1897. It is endemic to Tasmania, Australia.
The head and thorax are bronze in colour and shiny. The legs are a dark bronze, with the posterior tibiae suffused with white. The forewings are a bright, shining golden bronze with several shining white bands. The hindwings and abdomen are dark.