Geographic location of the bug: Dallas Texas Area
Time: 01:51 PM EDT
Your letter to the bugman: I found this guy on one of my Vitex bushes this Fall. He is 3″ long. What is he going to be?
How you want your letter signed: Clueless in Dallas
Dear Clueless in Dallas,
This is a Hornworm, the caterpillar of a moth in the family Sphingidae. Thanks for providing the food plant. When we searched for Sphingidae caterpillars that feed on Vitex, we found this posting for Manduca florestan on Wikipedia, and we then checked on Sphingidae of the Americas where we found images that appear to match your individual. Manduca florestan is listed as a stray in Texas. We will contact Bill Oehlke to verify our identification.