Geographic location of the bug: West Michigan
Time: 05:43 PM EDT
Your letter to the bugman: Curious what kind of caterpillar this is.
How you want your letter signed: Sincerely The Crow
Dear The Crow,
Were you near a grape vine? This looks to us like a Grapeleaf Skeletonizer Caterpillar, which is pictured on BugGuide.