A univoltine species, flying from late March or early April to mid-May.
Parasites: A small form of the bee Nomada alboguttata is cited as a cleptoparasite of this species (Westrich, 1989). Other sources state that A. ventralis is the host of Nomada ruficornis, N. zonata, N. panzeri (Kocourek 1966, Osytshnjuk 1977, Dylewska 1987, Osytshnjuk et al. 2008), Sphecodes pellucidus and Nomada alboguttata.