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Beautiful spotting! Here's a good place to start: https://en.wikipedia.org/wiki/List_of_mo...)
Leuba Ridgway, I believe you are right! Finding the species in this case is very exciting for me, as I observed adult Gulf Fritillary butterflies the same day, but didn't put the two together until the ID was made.
Looks just like a flatworm I have listed here: http://www.projectnoah.org/spottings/215...
Likewise tentatively, I agree with your identification of the creature as Bipalium vagum.
This looks very similar to a specimen I listed here: http://www.projectnoah.org/spottings/215...
I bet they are the same species.
It appears to be the pupa of a moth, but I haven't yet been able to find which kind.