The European Chafer beetle is roughly 1/2" long & typically are tan to light brown in color. This time of year they are easily mistaken for male May/June beetles, however, May/June beetles tend to be darker in color with considerably larger females. Adult European Chafer beetles begin to emerge from the soil mid-June through early July, and are often seen flying a few hours before & after sunset when temps are above 65 degrees. This peak adult activity lasts 2-3 weeks. Before the females lay their eggs below your turf, follow the link below on how you can act NOW to chemically control the spread of European Chafer grubs.
https://cdn.shopify.com/.../1/0145/8808/4272/files/A4141.pdf