Cimex rubens Fabricius, 1794 is a junior primary homonym of C. rubens Harris, 1780 which is a junior synonym of Deraeocoris ruber Linnaeus, 1758. Since both names were not used in one genus after 1899, the case refers to ICZN Art. 23.9.5 and P. rubens is the valid name and has precedence over P. alternatum (Lepeletier & Serville, 1828) [Aukema & Rieger 2006]