Pollen host selection by predominantly alpine bee species of the genera Andrena, Panurginus, Dufourea, Megachile, Hoplitis and Osmia (Hymenoptera, Apoidea)


	Head length to head width ratio in females of Panurginus herzi (light blue) and P. montanus (dark blue) (n = 150). Definitions for head length and head width according to Michener (2007).

Part of: Müller A (2018) Pollen host selection by predominantly alpine bee species of the genera Andrena, Panurginus, Dufourea, Megachile, Hoplitis and Osmia (Hymenoptera, Apoidea). Alpine Entomology 2: 101-113. https://doi.org/10.3897/alpento.2.29250