Flowering Plants Visited
by Ectemnius
trifasciatus
Ectemnius trifasciatus Say: Sphecidae (Crabronidae), Hymenoptera
(observations are from Robertson and Graenicher)
Apiaceae: Cicuta maculata sn (Rb), Oxypolis rigidior sn (Rb), Pastinaca sativa sn (Rb), Sium suave sn (Rb), Taenidia integerrima sn (Rb), Zizia aurea sn (Rb); Asteraceae: Achillea millefolium sn (Gr), Aster furcatus sn (Gr), Aster lanceolatus sn (Gr), Cirsium arvense sn (Gr), Eupatorium perfoliatum sn (Gr), Pseudognaphalium obtusifolium sn (Rb), Solidago canadensis sn (Gr), Solidago juncea sn (Gr); Polygonaceae: Persicaria hydropiperoides sn (Rb); Saxifragaceae: Saxifraga pensylvanica sn (Gr)