We stock the Chinese Mantis ooth (egg case) which is harvested in December/January in the US. The ooths are kept refrigerated, and they can be purchased through July with descent hatch rates. Each ooth will produce about 250+ nymphs, and is a great feeder for baby reptiles and amphibians. When you buy the Mantis hatching cup, the ooth will come glued to the bottom of the lid, all you do for hatching is to place the cup in 80 degree heat. Estimated time to hatch is 2 weeks.