There is insufficient data, however, specimens have been found in Switzerland at flowers of Asteraceae (Amiet et al., 2001).
Ebmer (1971) lists: Carduus, Jurinea and Tragopogon (Asteraceae).
Dittlo has a specimen of a male (det. Pauly) caught whilst nectaring at flowers of Sonchus arvensis (Asteraceae) in the Atlas of North Africa (pers. comm.).
In France, Pauly (in litt.) lists: Centaurea paniculata, Sonchus arvensis (Asteraceae); Cistus monspeliensis (Cistaceae).