We've had these Japanese anemones in our garden for five years,
they've always been great. Suddenly I just noticed today about 90% of
the foliage has been devoured. Here is a picture of the culprit(s):

http://www.kevinvansant.com/temp/anemone-bugs.jpg

There are a bunch of these bugs, and they're not eating anything else
but are wiping out the anemones.

Anyone recognize these guys? Know how to deal with them? (preferably
organically)

Thanks