Osmia caerulescens
Blue mason bee
Megachilidae
Vancouver Island Lower Mainland
Observation notes
Sandhouse 1925: 1920, Victoria. Buckell 1950: 1917, 1920,Royal Oak, Victoria. Tommasi et al. 2004: Greater Vancouver Area. Ratti et al. 2008: Fraser Valley. Spencer Entomological Collection, UBC: 2015, Delta. M. Clausen, Masters thesis: 2017, Delta. Guzman et al., 2023: 2007; 2012; 2014, 2015, Vancouver Island. 2011; 2013; 2016, Lower Mainland. iNaturalist: Vancouver Island, Delta, from 2017. NBSBC Bee Atlas: 2023, 2024, Vancouver Island.