Figure 3

Mounting techniques in Sepsidae. (a) "Typical" sepsid mount: male uses modified forelegs to clasp female wingbase; (b) Novel mounting technique in Perochaeta dikowi: male bends abdomen ventro-anteriad and makes contact with the ventral side of the female abdomen with his surstylus before sliding posterior to establish genital contact; (c) Novel mounting technique in Sepsis secunda: male bends abdomen ventro-anteriad to establish direct genital contact.