Osmia tristella
Megachilidae
Vancouver Island Lower Mainland Coast
Observation notes
Sandhouse 1925: (W.Downes), 1918, Saanich Dist.; (F.W.L.Sladen), 1915, Agassiz. Ratti et al. 2008: Fraser Valley. Guzman et al., 2023: (Elle), 2005; (Neame), 2007; (Gielens), 2009; (Wray), 2012; (Gillespie), 2014, 2015; (Kelly) 2017, Vancouver Island. (Button), 2011, Abbotsford. (Toshack), 2015, Lower Mainland.