Sift the buggers out of your compost and feed them to your birds, but as Jean has indicated at this time of year they will not eat you plant roots since they are most likely pupating now to become the adult beetles every hates. These are the larva of various Scarab Beetle family memebers.

Many people, I think mistaking the Black soldier Fly for the Black Soldier Beetle, say these grubs are beneficial. However, since the BSF as an adult does little except mate and produce eggs that become the maggots and these maggots need a pretty moist environment to hatch and grow they arfe an indication that your compost is too wet to properly compost, and a oo wet compost pile will not have the active thermophilic bacteria that actually generate the heat you are looking for.

Amy, I didn't care for them either, but I had no idea how to get rid of them. They simply died off on their own over the winter. You could try baiting the grubs with something like slices of bread or melon rinds. I'm guessing they would get to such food more quickly than the worms. Once the grubs swarm the bait (and before the worms get there), throw out the bait with the grubs. It might be a long battle and I'm not sure you'll be able to totally eradicate them. Andrew

I'd be surprised if your bugs are the same as those that live in the soil and eat roots. For example, I get grubs of black soldier fly in my compost pile - thousands of them. They only eat decaying organic matter though, and only live above ground. Carol is right - a picture will really help.