A picture is probably necessary for an accurate identification. In lieu of that, we would need an estimation of the size of this insect, and your general location.

i am going to bet.. chicago.. lol

ken

ha! Aren't I the observant one?

LOL............

On a serious note, when you say eggplant, my mind immediately goes to flea beetles. The ones I deal with are all black, but check out the dude in the link below. It is my first bet.

Here is a link that might be useful: red headed flea beetle

Your bet has my vote, calliope!