Cleptoparasitic: Hosts; Eucera (=Tetralonia) malvae, Eucera (=Tetraloniella) dentata and Eucera (=Tetraloniella) salicariae are the hosts of this species (Scheuchl 2000; Amiet et al. 2007). Bischoff (1930) reported T. malvae as the main host. Friese (1895) reported Colletes hylaeiformis to be a host of this species, but this host association is unlikely (Bogusch & Hadrava, 2018).