AbstractCydnidae are defined as those Pentatomoidea with setal combs at the apices of the coxae and a strigil on the ventral surface of the metathoracic wing. Eight subfamilies are recognized: Thaumastellinae, Amnestinae, Cydninae, Scaptocorinae, Sehirinae, Garsauriinae, Thyreocorinae (including onlyThyreocoris, CarrabasandStrombosoma) and Corimelaeninae.Eumetopiais included in Corimelaeninae.Dismegistusis excluded from Cydnidae.