I misled you, Sorry. The mud dauber and cave story relates to the cave paintings in Southern France. The notion of an ancient insect artifact proving the age of the paintings I was trying to relate to the way it is claimed the initial stones were dated ... detritus or coloring imbedded in the crevices that could be dated.
Well, I'm not a serious scholar in the field of your expertise, so I will accept your debunking of these stones and go on. But, darn it, you've shot to heck a fun myth!
No Problem, MGHinTN. You and I have had some fun on other threads... and there is still more fun to be had on others with cryptoarchaeological finds that are not such blatent frauds.