Sexing B.fusca

[Carnage]

How do i do this?

I have three adults with wings, one appears bigger than the two.
So im thinking that one might be a female.

Oh, and i also heard B.fusca is a hybrid between B.gigantues and B.craniifer. Is this true

 

[ZephAmp]

Blaberus fusca is an actual species of roach.
There are some hybrids out there of Blaberus craniifer and Blaberus fusca; However, hybrids between these two species and Blaberus giganteus don't exist.
If you flip them over and look at the last segment on their abdomen, you can easily sex them; males have two tiny segments while females have one massive one.