The banded net-wing beetle, Calopteron terminale has brilliant yellow orange elytra (front wings) with purplish black at the tips. Yellow and black is effective warning coloration. The lycids are typically predatory as larvae and feed as adults on insects or dead plant material. They produce toxic phenols and foul smelling pyrazines that deter predators such as insectivorous birds..Interestingly, the net-wing beetles are attacked by another type of beetle, a cerambycid that mimics the color of the net-winged beetle. The cerambycids can consume the net winged beetles toxins and process them safely. The cerambycids sequester the net-winged beetle toxins and use them for their own protection.
The pair of net-winged beetles in the photo were busy mating. Note that the male is much smaller than the female.