I think this is Eremobina unicincta, attracted to light. The size is right, flight time and range are good, we have the wet meadows, elevation, and suspected host plant (sedges) that it needs. Visually, I think it’s a match for the PNW pinned image and the 2 live images at BG. MPG shows this species in my area. I’ve photographed 4 individuals between 7/21 and 7/27/19 and one (not this one) was quite dark. I think this is a female but there may not be enough antenna showing to be sure. I have photos of 2 males (biserrate antennae) and a female with a better view of her antennae. I can submit those if it's worthwhile.