Cleptoparasitic: Hosts; Apparently a cleptoparasite of three species in the Andrena fuscipes group. On heaths and moors it undoubtedly attacks A. fuscipes, having been seen to enter burrows of this species (Frisby, 1906; Evans, 1906). In such habitat this Nomada is usually more abundant than its host. Elsewhere it seems to be associated with A. denticulata (R.C.L. Perkins, 1918f, 1919g; Chambers, 1949; G.M. Spooner, pers. comm.) and A. nigriceps (Chambers, 1949). Jones (1928) found large females associating with A. nigriceps, whilst Swale (1893) saw a female entering the burrows of this species. A. flavipes may also be a host, as Chambers (1949) observed females entering and remaining in the burrows of this bee. On at least two sites on Salisbury Plain, Wiltshire, N. rufipes has been found in localised abundance flying in the vicinity, and inspecting the nest burrows of Andrena nitidiuscula (Else & Roberts, 1994). Other possible hosts are Lasioglossum leucozonium, L. calceatum (both F. Smith, 1876), Colletes succinctus (Richards, 1979; ) and C. fodiens (Chambers, 1949), but further confirmation of these four species as hosts of N. rufipes is required. Most of these associations are listed by Smit (2018)