http://www.ext.colostate.edu/pubs/insect/05522.html/
up in the corner of the property I came across a gaggle of these on a female boxelder tree.
the tree is a volunteer that sits on the property line and is closer to my two neighbors houses than mine.
being the good neighbor that I am I have decided to tell them about the bugs.
while nice people both are probably the type that would object to the bugs taking up residence in their homes.
I am going to give them information on dealing with the bugs and the option of cutting down the tree if they're concerned
I was planning on eventually removing the tree anyway since it is shading out one of my garden beds
this seems to me to be a reasonable permaculture good neighbor approach