This is one of my all time favorite mantids. Incubation time for the ooth around 80F is about five weeks. If you can, find out when it was laid. If not, be ready with mel fruit flies which they will take for quite a while as they grow slowly. I would suggest that you use a cube and a heat lamp and start off by establishing a temp of about 85F, not lower, and 30-40%RH. You'll need an accurate thermometer/hygrometer, I always use the Caliber III from Amazon.
Depending on your ambient humidity, you may find the the RH is hard to maintain as high as 35%, if so, you may need a small ultrasonic humidifier like Sharp's Penguin, that uses about a gallon of tap water a day.
Lots of beginners raise this species with no special equipment at all, but at room temps this species takes a long time -- up to a year, according to Gurder -- to attain adulthood and the adults will not mate. To induce mating, you will need a temp of 100F or slightly higher and have expert control, learned in the months of raising the nymphs at lower temps, of the humidity. And when you have your first successful mating and ooths everywhere, please let me know!
Oh, and a thought on misting nymphs twice a week. If your nymphs are living under conditions of ideal humidity, a spritz twice a week won't make much difference. I have used 32oz pots with paper towel in the bottom, and 5 squirts with an ordinary spray bottle will produce about 3ccs of water, most of which will soak into the towel and evaporate over time.The moisture will increase by about 20%RH with a consequent drop of a few degrees of temp and then return to normal within four to six hours. In a net cube, you will notice very little change at all unless you use a lot more water. On the other hand, spraying the nymphs breaks the monotony of their day and makes us think that we are doing something for them. I do it regularly.
