You know it's summer with the sound of the first cicada. This year NJ and PA are only getting the common ones that are not part of the mass Brood emergences. We get the emergence of the 17 year cicada from Brood II (2) in 2013.
For more info on the Common Cicada.
For more info on the Magicicada, the 13 or 17 year Cicada.