The antennae of males are hairy while the antennae of females are relatively smooth. The aggressive encounters between males are quite impressive. Larger males usually win. Winners of encounters hiss more than losers. The hisses of males also contain information about the size of the male hissing and may be used to assess the opponent's size.
Males can also discriminate among the hisses of familiar males and strangers.
These hisses are audible and can be heard by observers. Although this species is primarily nocturnal, you can see males fighting during the day. Males also hiss during courtship interactions with females. Again, their behavior is unusual for insects in that strength and sound are used. To achieve this, the male pushes his abdomen under and along the female's body until he engages the end of her abdomen.