Ten-lined June beetle or Polyphylla decemlineata

June beetle showing Flabellate antennae - from the Latin flabellum, meaning fan. In The terminal segments extend laterally, with long, parallel lobes that lie flat against each other forming a plate-like structure. Looks like a folding paper fan when open.
This antennae increases surface area and can be used to detect odors and tastes, possibly even wind speed and direction, heat and moisture.
Laowa 100mm lens, f3.2, 140 sec, 2X, ISO 100, 54 stacked images, 103 µm step length, 5 fix LED, with diffuser tube

They are not very smooth fliers but rather clumsy because they barely reach eight kilometers per hour. They are strongly attracted to lights, causing them to bump and buzz against window screens, cover walkways and porches as they roll on their backs with their legs in the air. The most common grasses it feeds upon are Bermuda grass, St. Augustine grass, and tall fescue, all of which are plentiful in the Phoenix, Arizona metro area. Has little human benefit unless you like to fish because they make a great fish bait. Bass particularly find them tasty even in place of traditional worms.