Flowering Plants Visited
by Tropidia
albistylum
Tropidia albistylum Macquart: Syrphidae, Diptera
(observations are from Robertson)
Apiaceae: Sium suave sn (Rb); Asteraceae: Aster pilosus sn (Rb), Bidens frondosa sn (Rb); Caprifoliaceae: Symphoricarpos orbiculatus sn (Rb); Lamiaceae: Blephilia hirsuta sn (Rb)