Side view

Your caterpillar is a Eumorpha vitis - Vine Sphinx. Eats grape leaves or leaves of other vines. The background color of this cat can be brown, green, or gray.

This turns into a sphinx moth. Most sphinx moth caterpillars are called hornworms, but this species loses the horn early on, replaced by a little eyespot on the rump.

This post was edited by larry_gene on Tue, Jul 1, 14 at 23:50

Beautiful caterpillar photos.