I don't recall who's pattern it was or even what it was called, but I know exactly the grubs you are talking about - they ate a hole in my yard a year ago. They were so ugly I wanted to dig every one of them up and smash them. But I digress. Here's the pattern:

Tie in some cream antron yarn to make a dubbing loop at the bend of the hook. Insert very few tan dubbing fibers, then twist and wrap up the body. You can build up a taper or underbody if you want. The original pattern used a peacock herl head to simulate a caddis, and when wet, you had to look close to tell the real from the fly. Use a head/leg of your choice to match what you want. The antron, when wet, gives a very nice transluscent effect.