Making me work to earn my keep here at THG are you
Sorry, I canÃ¢â‚¬â„¢t upload photos so this is the best I can do. The first photo is an enlargement of your beetle- https://good-times.webshots.com/photo/2100593250103590453jhfMid
The second photo is edited to better help one focus on identifying characteristics-
Regarding the iridescence, depends on the lighting and your beetle was backlit. The beetle you photographed is a long legged beetle. TheyÃ¢â‚¬â„¢re designed for speed. A Green June Beetle is more designed for tunneling. HereÃ¢â‚¬â„¢s a decent image of a Cotinus nitida (Green June Bug)-
The beetle you photographed also has long antennae. The GJB has very short (insignificant) antennae that end in a club shape. Your beetle is definitely a Carabid not a Scarab in that yours has the classic narrow head, strong mandibles (all the better to eat juicy larvae and scrumptious caterpillars with), and hard wing covers that meet in a straight line at the center of the back with many fine parallel ridges running lengthwise. That particular door screen grid you photographed your beetle on was perfect. IÃ¢â‚¬â„¢m familiar with the size of the squares and they told me your beetle was just a little bit over an inch long. Green June Beetles are generally around Ã‚Â¾ of an inch however they can be slightly longer.
Please take another look at your photo which I enlarged. HereÃ¢â‚¬â„¢s another photo for comparison of telltale markings-
Now please read the below. Note the color markings of the head and prothorax (the anterior division of the thorax of an insect, bearing the first pair of legs), femora (the third segment of the leg of an insect, counting from the base, situated between the trochanter and the tibia), and the elytra (one of the pair of hardened forewings of certain insects, as beetles, forming a protective covering for the posterior or flight wings) I think you will find the description below to be a dead match to your beetle which is classified as highly beneficial whilst the Green June Beetle is classified as a pest-
Description 1-1 3/8" (25-36 mm). Black with dark greenish gold on sides of head and prothorax. Bluish luster on femora. Elytra greenish or blackish blue, edged with gold, fine lengthwise grooves and lines of elongate pits. Male has reddish hair inside curved middle tibiae and hind tibiae. From above, prothorax appears broadly oval, constricted before base of the elytra.
You definitely have photographed a Calosoma and IÃ¢â‚¬â„¢m pretty sure you photographed a Calosoma scrutator and it appears to be a male.