While visiting a friend in that region, I saw one on his glass door and try to capture it unsuccessfully.
I later saw one on a nearby sidewalk and crushed it, which is what you are supposed to do when you encounter one. (You are also supposed to report the sighting, which I did.)
They were brought to Pa. accidentally in 2014. They were recorded in New Jersey in three counties for the first time last year. Ugh.
More about Spotted Lanternflies (SLFs) in New Jersey here.
More about Spotted Lanternflies in Pennsylvania here.