Cleptoparasitic: Hosts; Andrena chrysopyga is widely reported as a host (Alfken, 1913; Enslin, 1922; Lefeber, 1984, Kocourek, 1966; Moeschler, 1938; Stöckhert, 1933; Smit, 2018). Kocourek, Moeschler and Celary (1995) also cite Andrena labialis as a possible host. Smit (2018)(citing others) adds Andrena gravida and Andrena polita as possible hosts.