RHH's photos with the keyword: bug

I have not been able to identify this beetle but perhaps someone can help. It was photographed near Grassi Lakes Banff National Park in Alberta, Canada.

You can't actually see the bug since he hides in the "spittle" he makes. He is actually a small hopper that encases himself in foam. In this case he has chosen the White Bog Orchid, Platanthera dilatata for his home.