A cricket’s body is composed of three sections: abdomen, thorax and head. At sexual maturity (approximately 2-3cm body) the female will have two cercus and an ovipositor at the end of her abdomen.
Anatomy of a Cricket (Enchanted Learning 2010: http://www.EnchantedLearning.com)
The central ovipositor is used to deposit eggs into a suitable medium. Males do not have an ovipositor and only possess two cerci. Spiracles on the underside of the body (small holes) allow oxygen to enter the body.As shown in the below photo the female cricket is on the left side and the male on the right. Note that the overlapping long wing covers of an adult male can deceptively look like an ovipositor. The male on the right hand side is an older animal starting to lose condition, evident by the darker wings and leaner body.
Female cricket on left, male cricket on right. (House Cricket, Acheta domestica)
© Zega Enterprises 2013, © Photographs, diagrams and tables by Glenn Kvassay or as credited 2013