Osmia (Allosmia) rufohirta Latreille, 1811

A univoltine species, flying from April (in the southern part of its range) to July. Stanisavljević (2000), probably copying Banaszak & Romasenko (1994) states that the species flies from May to June. Amiet et al. (2004) give a flight period in Switzerland from the beginning of mid-April to early August.

Fateryga (2017) reports females active in the Krasnodar region of the North Caucasus (Russia) in June.

Parasites: The Chrysidid wasp Chrysura dichroa lays its eggs into the nests of this species.

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