Phryneta leprosa, the Castilloa borer, is a species of beetle in the family Cerambycidae.

It was described by Johan Christian Fabricius in 1775, originally under the genus Lamia.

It has a wide distribution throughout Africa.

It feeds on Morus alba, Hevea brasiliensis, Coffea arabica, and Chlorophora excelsa.

This Phrynetini article is a stub.