Orange Head Roach Gender?

[Arthropod Hunter]

Thanks!

Sent from my GT-I9300 using Tapatalk

[JeffreH]

Both males and females of this species will be winged adults and they can be difficult to distinguish from one another at a glance.

The best way to tell E. posticus sexes apart is by looking at the tip of the abdomen: male will have a small white patch and females will not. Take a look at a few adults and you'll see what I'm talking about =)

Otherwise, as previously mentioned, the size of the last abdominal sternite is pretty much universal in roaches. Flip a few adults over and you should begin to notice an obvious size difference in that last ventral (belly) segment toward the tip of the abdomen... females will have a larger segment and males will have thinner segments. Try differentiating the sexes of other adult roach species using this method for practice, too.