 Males have been taken on the flowers of "Calochortus catalinae", "Hemizonia fasciculata", "Rhamnus californica", and "Xanthium spinosum".Both males and females visit the extrafloral nectaries of "Helianthus" and have been collected at flowers of "Atriplex semibaccata", "Cicuta" sp., "Eriogonum fasciculatum", "Eriogonum gracile", and "Foeniculum vulgare".The flight period in California is from May to October, with a peak in July and August.