Phytocoris betuleti Fallén, 1826: 15. STS: male, female, Sweden, prov. Skåne, Gyllebo; MZLU? (not found, R. Danielsson, in litt.).
?Cimex cruentus Müller, 1776: 108 (junior primary homonym of Cimex cruentus Fabricius, 1775; syn. Reuter, 1883e: 460). ST(S): Denmark (incl. Norway); lost.
?Cimex leucostictos Gmelin, 1790: 2180 (junior primary homonym of Cimex leucostictos Gmelin, 1790: 2148). New name for cruentus Müller, 1776.
?Cimex mulleri Turton, 1802: 682. New name for cruentus Müller, 1776.
Capsus ruber Herrich-Schaeffer, 1835b: 50 (syn. Reuter, 1888a: 306). ST(S): Germany; lost.
Capsus betulae Kirschbaum, 1856: 254, 327 (syn. Reuter, 1873: 20). STS: female, Germany, Wiesbaden; MWNH.
Capsus ambiguus (non Fallén, 1807): Flor, 1860: 627; Fieber, 1861: 305 and some other authors. Misidentification (see Thomson, 1871d: 445; Reuter, 1875g: 177).
Psallus betuleti var. minor Westhoff, 1881a: 66. For var. "c" in Reuter, 1875g: 176. HT: Germany, Münster; LMND?
Psallus betuleti f. nigricollis Stichel, 1933: 261, 263. For var. β in Reuter, 1878a: 111 (= var. "c" in Reuter, 1875g: 176). STS: female (by Stichel used for both sexes). The same as var. minor Westhoff, 1881.
Psallus betuleti f. nigrivestis Stichel, 1933: 261, 263. For var. γ in Reuter, 1878a: 111, 179 (= var. "b" in Reuter, 1875g: 176). STS: female (by Stichel used for both sexes), Finland, Pargas; MZHF?