Surprise! As I was mowing this morning, I noticed movement underneath a pipe, and discovered one more chysalis, with its butterfly still clinging to it! (There were at least two caterpillars whose chrysalides I never found.) I thought it was a very clever place to make a chrysalis – the pipe sheltered it nicely. I went out again later and saw the butterfly take its first flight off into the world. Good luck, little guy!