As this is a cleptoparasitic species, all flower visits will be for nectar only.
Mavromoustakis (1952) lists Sinapis alba (Brassicaceae) as a nectar source in Cyprus.
Flower records from data labels of specimens from Israel, Greece and Lesvos are as follows: Scandix australis ssp. australis, Biscutella didyma, (Apiaceae); Calendula arvensis, Senecio vulgaris (Asteraceae); Muscari commutatum, Muscari neglectum (Asparagaceae); Asphodelus aestivus (Asphodelaceae); Reseda alba (Resedaceae); Sherardia arvensis (Rubiaceae); Ononis spicata,Trifolium clypeatum (Fabaceae)