Osmia (Pyrosmia) viridana MORAWITZ, 1874

A univoltine species, flying from April to July (Banaszak & Romasenko, 1989). Mavromoustakis (1951, 1952; 1953) reports activity in March and May in Cyprus (using the synonym O. nicosiana). Amiet et al. (2004) give a flight period in Switzerland from mid-April to mid-July

Parasites: Mavromoustakis (1948) reports rearing Chrysura (=Chrysis) dichroa from a nest of the species

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