Why they are Beneficial
Assassin bugs feed on many different insects and spiders, and will even cannibalise if there are not enough other insects about to prey on.
Both adults and nymphs are voracious predators, but unfortunately they are indiscriminate hunters so they will get a few good bugs as well as many pests. They ambush their prey and then with their piercing proboscis they stab and inject saliva, causing the insides to turn to liquid which they then suck up.