Hoplitis onosmaevae sp. nov., nesting habitat and behaviour (France, Saint-Dalmas-le-Selvage, 23.6.2020, for photographs). 20. Female in buzzing position on a flower of Onosma tricerosperma subsp. fastigiata; 21. Female leaving a flower of Onosma tricerosperma subsp. fastigiata; 22. Nesting habitat with dead trunks of larch; 23. Nest entrance plugged with sand and pebbles; 24. Female near the nest entrance, which is visible at the bottom left; 25. Cross-section of nest (P = pollen provisions).