This evening, I got home early, and dragged Rosie out back with me to check on the little guy. (She couldn't have cared less about him, but there's always the possibility of rabbits!)
I eagerly stepped up to the sage plant, and peered down into it. There, on the stick, was a faded, papery, empty cocoon. Stupidly, I lifted my eyes and scanned the yard, maybe thinking he'd just left and was still hanging around the garden. But nope, he was gone. Didn't even leave a note. "So long, and thanks for all the parsley." Just an empty casing; insect trash.
Somewhere, around the neighborhood, is something that looks a little like this:
Good luck, Herb! Thanks for stopping by!
I didn't get a chance to snap a pic of the empty pupa before dark, but I'll add one to the bottom of this post when I get a chance.