You cant mistake the adults they have wings and are probably between 6 and 8 cm. The females are usually slightly larger, they have more bulk than the males who are slimmer, have a lean build and that little bit smaller. It takes time and alot of warmth before they begin to mate. The temperature has to be right, you will know when mating starts as the males ride around on the backs of the females for days at a time. If it doesnt look like the adults are getting amorous it would probably be worth upping the temps you will need it to be between 20 and 26C but I found I had more sucess when it is closer to the 26C. I am pleased to help I hpe this assists you.