I'd like to find an organic method to remove them.

We're located in Santa Cruz, California.

Thanks!
-a

Beyond that, it's likely a small caterpillar which works with in a silken "house" of sorts. Thus, the best management is to squish each webby thing you see which obviously works best if you have a reasonable number of the things.

Sounds more like spidermites to me. Smaller mites will appear off white with two dark spots, one on each shoulder. I finally had some luck with Toni's home made mite killer after temps started dropping.

I think that this critter needs to be accompanied by a photograph for a decent identification. Even an image of the damage would be helpful.

Yes, I heard. But not in this country.

"They have been eating my Ceanothus since mid-summer" Til OCT 26 seems a little LONG TERM for caterpillars.

A picture(I agree) would be helpful.