Ann, those look like Pipevine Swallowtails to me.
I actually found out about the "goo" phase by scientific inquiry. Okay, I did something kind of dumb. Swallowtails (for the most part) overwinter in their chrysalis, making it in the fall but not emerging until spring. But sometimes you get some that come out early and some that decide they like it in there and just want to stay. Seriously, I once had a Zebra ST in a chrysalis for 13 months! And it came out perfectly fine! But before I knew they would occasionally go WACO (We Ain't Coming Out) on me, I thought the chrysalis was a dud. Now folks, unless the chrysalis turns black, smells funny, or has some other suspicious thing going on with it, it's probably fine. Leave it alone. However, I didn't know this. So I broke one open. It was a Zebra ST chrysalis - my favorite butterfly, and also the first species I raised in large batches. Inside, there was indeed a "goo". I hate to compare things to food, but you know when they have those Cadbury egg commercials on TV around Easter? That's kind of what it reminded me of. Thicker than a chicken egg, and kind of a pale yellow color. Certainly nothing that resembled a caterpillar or butterfly. I have since learned not to do that but it was rather educational.
Oh, and while I'm here - check this out! I wish I still lived in Philly (went to UPenn); I would totally walk next door to Drexel and see this!
http://www.wdel.com/story.php?...
