Figures 1-5 from: Müller A, Richter H (2018) Dual function of Potentilla (Rosaceae) in the life history of the rare boreoalpine osmiine bee Hoplitis (Formicapis) robusta (Hymenoptera, Megachilidae). Alpine Entomology 2: 139-147. https://doi.org/10.3897/alpento.2.30158

Figures 1-5 Hoplitisrobusta. 1) Female collecting pollen and nectar on Potentillaerecta. 2) Head of female. 3) Nesting habitat in the Calfeisen valley near St. Martin (St Gallen). 4) Dead fallen spruce (Piceaabies) with nesting branch marked with red arrow. 5) Nesting branch with nest entrances marked with red arrows.