TL;DR: The univoltine adults feed on honeydew and ragweed sap and Courtship behavior by both sexes is complex, involving several stereotyped wing movements, proboscis and foot contact, head butting, and male territoriality or lekking.
Abstract: -Larvae of Euaresta bella (Loew) and E. festiva (Loew) de stroy seeds of Ambrosia artemisiifolia L. and A. trifida L., respectively; E. bella has been colonized in the USSR for ragweed control. The univoltine adults feed on honeydew and ragweed sap. In Maryland, E. bella adults reach peak abundance in mid-August, E. festiva a month later. Courtship behavior by both sexes is complex, involving several stereotyped wing movements, proboscis and foot contact, head butting, and male territoriality or lekking. Oviposition occurs in the young female flowers.