Cleptoparasitic: Hosts; A cleptoparasite of Andrena nitidiuscula (Spooner, 1946). The host is a scarce bee in Britain, but is well established at the Purbeck site.
A. pallitarsis is an additional host of the species in mainland Europe (Enslin, 1922; E. Stöckhert, 1924; Celary, 1995; Smit, 2018), and Smit (Scheuchl & Willner, 2016) additionally lists Andrena pontica and Andrena fulvicornis as possible hosts