Lygaeus rubicundus Fallén, 1807: 84. STS: male, female, Sweden, Westrogothia [= prov. Västergötland] and Finland; MZLU.
Capsus rubricatus (non Fallén): Meyer-Dür, 1843: 73. Misidentification (see Fieber, 1861: 278).
Lygus rubicundus minor Reuter, 1896c: 73 (downgraded to var. by Wagner & Weber, 1964: 220). HT: male, Portugal, Felgueira; MZHF.
Lygus rubicundus var. winnipegensis Knight, 1917b: 591. HT: female, Canada, Manitoba, Winnipeg.
Lygus rubicundus ab. schmidti Kiritshenko, 1926b: 27 (unavailable name, after upgrading to forma by Stichel, 1958a: 862 became available, but a junior primary homonym of Lygus atomarius f. schmidti Stichel, 1930). LT (Kerzhner et al., 1997: 135): female, Russia (FE), Kamchatka, Kljutschevskoje [= Klyuchi]; ZMAS.
Lygus rubicundus var. collaris Wagner, 1949b: 36, 39. HT: male, Austria, Steiermark, Admont; ZMUH (see Aukema, 1999: 7).
Lygus (Agnocoris) rubicundus f. fuscoangulata Stichel, 1958a: 718.
Lygus (Agnocoris) rubicundus f. variegata Stichel, 1958a: 718 (junior primary homonym of Lygus variegatus Poppius, 1914).