Those are Japanese hornets. Nasty buggers, they are. I can remember some years back, I was riding on my GL500 SilverWing down a narrow country road when I felt something bump into my chest. My leather jacket was open at the top so whatever it was slid down between my jacket and shirt. I felt it crawling and decided to do beat it to death with my left hand. Wrong strategy. It started stinging me and there was nowhere to stop. I finally found a driveway to stop in, jumped off the bike like a madman and started ripping of clothes. I must have got stung 5 times by that sob. And it had the nerve to survive and fly off afterwards. I'm not allergic to bee stings but I did feel a bit funny after that and contemplated either going home or finish off the ride. I decided if I was going into shock I would rather go out on the bike. I finished the ride. My wife wasn't happy with that decision after I told her what happened.