See www.inaturalist.org/flags/217281

https://blogs.ethz.ch/osmiini/palaearctic-species/osmia/subgenus-osmiaa

Osmia (Osmia) bicornis (Linnaeus, 1758)

• 1758 Apis bicornis Linnaeus, Systema Naturae, 10th edn, vol. 1, p. 575. Type material: Holotype f, “in Europa” [Sweden], LSUK (London). Type species of Osmia Panzer.-Combination Osmia (Ceratosmia) bicornis (Linnaeus) in Schmiedeknecht (1885: 19 [885]).-Synonymy with Osmia rufa (Linnaeus) in Dalla Torre (1896: 407) and in Warncke (1986: 121), but see Day (1979: 51, 70).
• 1758 Apis rufa Linnaeus, Systema Naturae, 10th edn, vol. 1, p. 575. Type material: Lectotype m, by designation of Day (1979: 70), “in Europa” [Sweden], LSUK (London).-Combination Osmia (Pachyosmia) rufa (Linnaeus) in Friese (1911b: 126). Combination Osmia (Osmia) rufa (Linnaeus) in Zanden (1988b: 127).-Synonymy in Kirby (1802: 273) and in Day (1979: 51, 70).