What about ghost mantid oothecas?
How long do they take to hatch?

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3.1.0 Bearded Dragons
2.5.2 Leopard Geckos
1.1.0 Chinese Mantids
1.4.0 Border Terriers
1.0.0 Corn snake

be carful who you buy the oothecae from. ive bought several through ebay and none has hatched. i thought it may have been my fault but i just hatched my own bred ootheca just a few days ago. peacock mantis everywhere at the moment. the female will lay an ootheca wether she has been mated or not and if not, the ootheca will be sterile. my peacock mantis oothecae are taking 9 weeks at 21'C. i would guess at ghost mantis oothecae taking a little longer as they grow slower than most or an average mantis, but they is just a guess, i could be way off