http://www.ipm.ucdavis.edu/PMG...
The first is from UC Davis, but it looks like it refers mostly to the turn grubs.
http://forums.gardenweb.com/fo...
And this is from the California garden forum at GW.
You say you don't think they are turf grubs. Any way of telling if they are beetle larvae? Are they confined to the compost pile -- and maybe they are just doing their job?
I would tend to say a handful of diatomaceous earth to the compost pile might do them in, but it would be better to find out why they are there and what they are up to. Figs?