﻿AbstractFour species of the genusIschnothyreusSimon, 1893 from Tibet, China are recognised, including three new species,I.caoqiisp. nov.(female),I.metoksp. nov.(female), andI.pomesp. nov.(male and female). Males ofIschnothyreuslinzhiensisHu, 2001 are discovered for the first time since its description. Descriptions, diagnoses, and photographs of the four species are provided.