The following information is based on my experiances ONLY.
This is an especially hard specie to keep, mostly due to that i for one, have not being able to find any care sheets on them. Since they are from a hot country, I assumed that they do not need any moisture. Currently, the 2 nymphs that have hatched from the ootheca I had, are L4 but still only about 1/2 of an inch long. I keep them at ~0% humidity, 20- 25°C. I feed them every day with Fruit Flys only.
They eat a lot! Almost feels like they eat but very slowly getting fatter. I think this is to the fact that they try to process their food as fast as possible, just leaving the moisture behind. As for such a small nymph, they most certainly probably need as much moisture as possible to keep them alive at such the hot days, sometimes exceeding 30°C... Some of you know what i mean, if you ever went to a country, or just send down under the sun for a few hours, and feel like you are being dried out.
Sexing your mantids
I assume just like any other specie of mantids, but only time will tell.
As the mantis grows it will shed its skin several times, becoming almost twice larger as before at each stage, until it matures. A general rule, the terrarium's walls on each side should be no smaller then the full grown mantis's length times 2, and The distance from top to bottom should be at least 3 times the size of the mantis. Since both the skin of the mantis and the molt will stretch every so slightly.
Temperatures and Humidity.
For me, they seem to be doing fine at 20-25°C.
I incubated their ootheca at ~30% humidity, 20- 25°C. Doing so, only 2 nymphs have hatched from that ootheca. I have a feeling that it might be needed to be kept with ~0% humidity, similar to B. Mendica's oothecas.
Breeding Your Mantids.
Did not have a chance to do so, will inform if or when I have.