Anthocoris formicetorum Boheman, 1844: 158. STS: "Skandinavia"; lost.
Xylocoris formiceticola R.F. Sahlberg, 1848: 82 (syn. Reuter, 1871a: 412). STS: Finland: Yläne and Kuusamo; lost?.
Xylocoris cenomyces Baerensprung, 1858a: 195 (syn. Reuter, 1884c: 39). LT (Péricart, 1970: 748): female, Germany, Berlin; ZMHB.
Xylocoris formicetorum Baerensprung, 1858a: 195 (junior secondary homonym of Anthocoris formicetorum Boheman, 1844). LT (Péricart, 1972: 237, as "type"): ?, Germany, Berlin; ZMHB.
Xylocoris cursitans (non Fallén, 1807): Schiødte, 1870a: 225. Misidentification (see Reuter, 1884c: 39).
Piezostethus nigritulus Reuter, 1879d: 40 (syn. Reuter, 1884c: 47 under the misprinted name nigricans). ST(S): Germany, Berlin; lost.
Piezostethus sphagnicola Reuter, 1883b: 135 (syn. Hellén, 1926: 14). HT: female, Finland, Åbo [= Turku], Pargas; MZHF.