Check this site out. Bill
http://ento.psu.edu/extension/factsh...ated-stink-bug
.
We had a bunch get into the rv in Hershey, Pa. after the Rally last year. Finally in June 2013, they stopped coming out of their hiding places. I found most of them in the skylight over the shower. The article says that they don't lay eggs in structures, but I found a lot of young ones this spring.