Alydus calcaratus (Linnaeus, 1758)

Cimex calcaratus Linnaeus, 1758 was placed on the Official List of Specific Names in Zoology as type species of Alydus Fabricius, 1803 (International Commission on Zoological Nomenclature, 1950: 467); see also Opinion 244 (1954). The names hirsutus, atratus, pluto and ater all refer to a dark form, which is the only form reported from North America. Alydus niger Motschulsky, 1859 is a nomen nudum and is referable to this species (Kiritshenko, 1915a).