Figure 3 from: Bogusch P, Hlaváčková L, Petr L, Bosch J (2020) Nest structure, pollen utilization and parasites associated with two west-Mediterranean bees (Hymenoptera, Apiformes, Megachilidae) nesting in empty snail shells. Journal of Hymenoptera Research 76: 113-125. https://doi.org/10.3897/jhr.76.49579

Figure 3 A Macrophotography of pollen of Lithodora fruticosa from a Hoplitis fertoni nest (locality S35). Photo by L. Petr. B macrophotography of pollen from an Osmia ferruginea nest (locality S7). Larger pollen grains are Thymus vulgaris; smaller grains are Cistus albidus. Photo by L. Petr.