Papa Lazarou
Living in a De Zerbi wonderland
They're either Cockchafers or June bugs. Some of them come in stupid sizes and can block out the sun when they fly overhead. Wilkipedia will reveal all.
We used to call them June bugs as well, when I lived on Shoreham Beach... they make one hell of a racket... which is ironic really, as it was racquets of the tennis varirty that we used to despatch them