Cases of maternal care and egg guarding were observed and photographed in bugs of the family Tessaratomidae. Females of one still undescribed species of Pygoplatys from Doi Inthanon, Thailand, and of Pygoplatys acutus from Borneo are carrying their young larvae on the venter. The egg guarding was also observed in Pygoplatys acutus from Kepong, Peninsular Malaysia. It seems, that maternal care is a characteristic behavior in bugs of the genus Pygoplatys.