﻿AbstractTwo new species ofTerrobittacusTan & Hua, 2009 are described and illustrated from Sichuan and Guangxi provinces of China, increasing the species number ofTerrobittacusto eight.Terrobittacusemeishanicussp. nov.is differentiated from its congeners by wings with distinct markings and a female subgenital plate with a V-shaped carina.Terrobittacuslaoshanicussp. nov.can be recognized by the black terga VI–IX. A key to species ofTerrobittacusis updated. The species distribution and the relationship between adult morphology and mating behavior were briefly discussed.