Subject: What beetle
Location: Central MA
July 27, 2016 4:11 am
A friend thinks a costa Rican beetle I think they were showing off
Signature: Inazuma Hiro
In a sense, you and your friend are both correct. These are Banded Net-Wing beetles, Calopteron reticulatum, and based on this Alamy image, the species ranges as far south as at least Costa Rica. You image depicts quite a mating frenzy.