They have spun their cocoon and are "hanging out" for a week or so until they are ready to emerge. Here are a couple of photos of the chrysalis. Only one is left - the other two must have crawled away to hang out elsewhere.  They sometimes do that I understand.  So glad to have one at least.  I'll keep you posted as the metamorphosis continues.

8/6/16 Black Swallowtail Butterfly chrysalis stage 8/6/16 Black Swallowtail Butterfly chrysalis stage