'Spittle bugs'....I usually just pick them out and squash them, but there are all kinds of suggestions out there as to how to deal with them. They can move pretty fast, so be prepared to lose a few, but if there aren't too many on your plant, then picking them off may be the way to go.

Here is a link that might be useful: spittle bugs

This is another site that gives some info about the spittle bugs

Here is a link that might be useful: more info