FIGURES 1–4 in Palaearctic Osmia bees of the subgenus Hoplosmia (Megachilidae, Osmiini): biology, taxonomy and key to species

FIGURES 1–4. Flower-visiting females of Osmia (Hoplosmia). 1: Osmia spinulosa on Buphthalmum salicifolium (Asteroideae). 2: Osmia spinigera on Centaurea spec. (Carduoideae; photo H. Wiesbauer). 3: Osmia bidentata on Centaurea spec. (Carduoideae; photo A. Gogala). 4: Osmia pinguis on Inula spec. (Asteroideae).Published as part of Müller, Andreas, 2018, Palaearctic Osmia bees of the subgenus Hoplosmia (Megachilidae, Osmiini): biology, taxonomy and key to species, pp. 297-329 in Zootaxa 4415 (2) on page 299, DOI: 10.11646/zootaxa.4415.2.4, http://zenodo.org/record/124199