M.T.
Like the previous responder said these are Japanese Beetle that bite so they are not harmless. I got bit on the back once while taking a shower. Scared the you know what out of me. In my home they hang out by the warm sunny windows. I sprayed Raid Flying Insect bug spray at the very top of the window only (so my little ones wouldn't get into it) and wiped the rest of the window down with cleaner. The bugs always seemed to go to the top of the window, they would get this stuff on them and die. I would just sweep them up right when I got home from work before the girls could get to them. Though the girls do like getting a tissue and putting them in the garbage. These beetles seem really bad this year. Good luck.