Flower-Visiting Insects
of Pitcher's
Leatherflower
Clematis pitcheri (Pitcher's Leatherflower)
(Bumblebees suck nectar or collect pollen; the Syrphid fly is probably non-pollinating; observations from Robertson)
Bees (long-tongued)
Apidae (Bombini): Bombus auricomus sn cp, Bombus pensylvanica sn cp, Bombus vagans sn
Flies
Syrphidae: Volucella vesicularia exp np