This pretty metallic blue beetle is in the Buprestidae, the metallic wood-boring beetles. It is in the same genus (Agrilus) as the notorious emerald ash borer, but is much smaller at about 7 mm. It is not a specialist the way the ash borer is, although it is said to really like honeysuckles. I wonder if it has ever been considered for biocontrol of tartarian honeysuckle! This too, like the emerald ash borer, is a non-native introduction. I hadn't seen these beetles at FWG before, but undoubtedly just missed them in the past. I think that, having seen dozens of them in other places, I was more attuned this year.