Ron,
This has been asked a time or two on the mantidforums. It seems the in-breeding in mantids often leads to HEALTHIER populations than when you start mixing the pot.....At least in captivity.
At any rate, mantids don't suffer from the same issues that inbreeding causes in mammals.
I have no idea why, but they just don't seem to.
Swords,
Sure doesn't hurt to keep the old ooth around! You never know...even burst species do occaisonally produce an odd late hatch. Just don't hold your breath.
Great to hear the babies are eating! Aren't they just so cute?
And if you thing THEY look like ants...you should try some ant mantises....These are truly ant mimics...and they do a GREAT impression!