Neuroptera; Myrmeleontidae; Myrmeleontinae) but I thought I should check just to be sure.
Antlions are so-called because they are voracious and often feed on passing ants. If the ants attempt to climb out of the pit, the occupant flicks small pebbles at it until it knocks it down. Once in the bottom of the pit, it is usually a goner.
From the web
Adult antlions are common visitors to light sheets because they are nocturnal. They are especially common in the more arid or open areas of Australia. Even though there are dozens of pits in our carport, I cannot recall ever seeing an adult at the light sheet. I have kept the cocoon to see what eventually emerges.