Ghost males have eight segments and females have six. These are viewed from the underside of the abdomen, beginning just past the point where the hind pair of legs attach to the thorax. It is easier to distinguish nymphs of this species by looking for the longer, twistier "horn" on the males' heads. Females, young and old, have a shorter, stouter horn.
Lots of dud oothecae in this species, in my experience, even when fertilization seems guaranteed.