I can't remember if this was a separate individual from the plantago visiting b. occidentalis but is for visiting of melilotus albus.
Female nectaring on showy milkweed
2-3 males patrolling lysimachia ciliata, released both after pictures
Plants 20-40 cm high, with lanceolate leaves 6-8cm long. Flowers as per photo, 3-4 mm across. In mixed, partly open coniferous forest.