Osmia tristella
Megachilidae
Vancouver Island Lower Mainland Coast
Observation notes
Sandhouse 1925: 1918, Saanich Dist.; 1915, Agassiz. Ratti et al. 2008: Fraser Valley. Guzman et al., 2023: 2005; 2007; 2009; 2012; 2014, 2015; 2017, Vancouver Island. 2011, Abbotsford. 2015, Lower Mainland.