Let's agree on one thing: you don't always have to be able to identify a critter right down to species to appreciate it. Sometimes, an approximation is perfectly acceptable... at least, until one has more time to, as it were, get into the taxonomic weeds. What I can tell you is that I spotted this delicate little wasp visiting the Astilbe blossoms that are now flowering with a kind of reckless abandon and luring in all manner of insects. Based on the presence of that sharp ovipositor on the abdomen, it's clearly a female and it probably belongs to a large family of parasitic wasps known collectively as Ichneumons. From the small size and the shape and remarkable flexibility of her abdomen, I'm leaning, with the visual help of BugGuide, towards placing it in the subfamily Anomaloninae, which parasitize beetle and lepidopteran larvae. I'm not, to be perfectly honest, leaning very far, but on first glance, that seems like the right direction. With any luck, I'll have more time to dig a little deeper and maybe nail her genus, even species. For now, however, I'm content to just enjoy her genuine beauty. And be glad I'm not considered a target for her parasitism.