Question
Good morning,
I live in Evansville,IN, the southern tip of Indiana. I have a boxwood elder tree on my front yard, that has full sun. This tree and the lawn surronding it has been overcome with what I have been told are "boxwood bugs". The tree is probably 30 yrs. old. I have lived here 15 yrs. and this is the first time I have ever seen them.
The bugs are mostly red and at first glance resemble a lady bug.They have 6 legs, most of them are red, but there are some that are only black. I assume they are male and female. They cluster in very large groups on the tree and on the surrounding landscape rocks. They fly and I have spotted a few on the guttering and near the door.
Will they damage my tree and lawn? Will they go away on their own accord? Do they come back regularly and do I need to use an insecticide to get rid of them?
If they are not harmful to my tree and will go away in due time, they really don't bother me.
However I do not want to lose my tree and lawn to this large population of bugs.  

Answer
Boxelder bugs do not injure the tree. They attack the seeds of the female trees. They are however a pest that will get into your home to find a place to over winter. Here is a web site that explains the bugs and the control.
http://www.entm.purdue.edu/entomology/ext/targets/e-series/EseriesPDF/E-24.pdf
Generally you do need to control these insects and when they are congregated as adults the mass can easily be controlled.