L3/L4/L5
currently eating green bottle flies
Deroplatys desiccata are a medium/large mantis from Malaysia, they are very easy to care for.
Keep them between 26-35c during the day, and allow a temperature drop to 18-22c at night.
Humidity, spray these mantis every other day, they like it to be between 50-80%, make sure the enclosure drys out in between spraying, as if its too humid for extended period of time this can kill the mantis.
Photos show different sized nymphs, along with an adult male and female.