Tripwire Wasp

This is a rather small animal. It could be an ant, too. It shows a slender waist and some scary teeth. Otherwise it resembles more a gnat, being mostly orange-brown. I just named it for fun in reference to the first photograph. The animal happened to be standing behind a spider silk. Update 4/6/2017: Today, I documented what I believe could be the same species as what I jokingly called Tripwire Wasp. They are small, maximum 3mm. Antennae are extremely long and multisegmented. Body blackish, abdomen brighter, legs orange. The legs are lacking spurs, or have only small hints of them. This species is probably extremely common. I found at least three on our Lilly Pilly bush. They were at what I call a deadly photographing height, about one metre above ground, too high to kneel down, too low to be standing. Bending over, holding breath and staying steady for minutes is hardly ever worth the effort. With their long mouthparts they seem to be feeding. One photo shows a mite underneath, hinting that they could be in some (predator or prey) relationship with the wasp. I will rename this species once I find a match in some reliable representation database.