Cleptoparasitic: Hosts; This species is cited as a cleptoparasite of Hoplitis leucomelana, Hoplitis claviventris, Hoplitis tridentata and Osmia gallarum (Westrich, 1989; Banaszak & Romasenko,1998).
Celary (1989) lists Heriades truncorum, Chelostoma florisomne, Osmia gallarum and Hoplitis parvula as hosts.
Kasparek (2015) [citing others] and Stanisavljević (2000) list a variety of small species of Megachilid, including: Hoplitis leucomelana, Hoplitis claviventris, Hoplitis tridentata, Hoplitis anthocopoides, Heriades truncorum, Osmia gallarum, Chelostoma campanularum and Chelostoma rapunculi.