Strange visitor from another planet.

One night recently, several of us were pulling a late shift at the studio. It was hot, so we had the window open. One of these flew in:I'm not an insect aficionado. My instinctual response to bugs is usually "Enemy! Enemy! Unstoppable enemy seeking to drive me from the top of the food chain!" But it's hard not to be entranced by something as gorgeous as this guy (gal?). Wish I knew what I was