As said, a cockchafer. I was in rural France years ago when there was an incredible hatch of the things - like something biblical. You could hear them crunching under the wheels of cars, and there were loads of frogs and toads out feasting on them.
OT,but reminds me of a gag on telly about two Daddy longlegs getting friendly. Comedien said " they're mating2,then "Dictionary says there's no such thing as a mummy daddy longlegs. " Out with swatter 2 none of that around here ,blokes "