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The grass-living thripid species, Bregmatothrips willcocksi (Priesner) is recorded for the first time from Iran on the basis of materials of both sexes collected on Johnson grass, Sorghum halepense (family Poaceae). This is the second member of the genus Bregmatothrips from Iran and in contrast to most species in the genus has forked sense cones on antennal segments III and IV. An Illustrated key is provided for distinguishing B. willcocksi and B. bournieri Pelikan.