An Empty Cocoon Casing

A macro shot of a cocoon casing was found on the rim of a large flower pot in our garage. I had dreams of watching it hatch into a moth or something? But unfortunately it got torn. I find the dark bands on the cocoon fascinating! They look like perforated webbing. Intricate designs of nature are so intriguing, don't  think. The casing was very hard  and brittle and  I think it was probably empty before it got torn .