If it were me I would check the stinger or sucker to make sure it isn't hardend yet. This species of assassin eats soft body foods. I fed them silkworms and cabbage loopers. When they were smaller the sucker was pretty soft and flexible. I've only ever fed them to wheel bugs (another assassin) and various mantis species. I wasn't keeping chameleons at the time.
Even if you don't feed them to the chams they are a interesting insect to raise and they are very beneficial to gardens.