So its been a few days, but my Phlox and Penstemon are still under attack from these strange black insects. I've googled aphids, thrips, and several other well known garden beasties, but none of them seem to match the guilty critters!
Last night I managed to scrape one out alive and intact (they're so small I usually end up squashing them) to photograph. This will help my detective work no end!
Anyway enough of sickly plants, I have many more that are fit and well, and growing furiously in the sun, and my garden on a roll bed is starting to look positively jungly in places. Not too many flowers yet but plenty of green and very excited. Will take another round of photos and post this weekend :)