This seventh post cataloging creatures attracted to flowering boneset shows a couple kinds of ants. The second one was probably part of a nearby hatching.
One insect I didn't get a photo of--the "weird one that got away"--was seen only once, and looked like a cross between an oversized mosquito and an undersized, white and black crane fly.
Add these three and we're up to 48 distinct species on seven boneset plants in one Princeton backyard.
My apologies, by the way, to any and all who actually know anything about insects and spiders, for the questionable way I bunched these bugs in rough categories. Names will be attached to photos as this botany-type blogger becomes enlightened about the bewildering variety of insects and spiders out there.