How do you tell a gender of a praying mantis?

The difference between a male and female praying mantis is that the female is larger and the abdominal is larger than a males abdomanal.
Adult female Mantises are larger than adult males. That's one way to tell them apart. Quote from the Related Link: "The abdomen of the mantis has several segments. The male mantis, which is usually smaller than the female, has eight segments in its abdomen. The female has only six. The female also has a tube called an ovipositor for laying eggs."