I reply, "You have sent images of the larva of Sphecodina abbottii, the Abbott's Sphinx.
Pictures and info via the link from http://www.silkmoths.bizland.com/onOntariosphlar.htm.
I will shortly post a link from this page to your images.
"If your grape vine is well established and they have not stripped it of its foliage, there will not be any harm done.
Thanks for thinking of me."
Use your browser "Back" button to return to the previous page.
Please report sightings and send high quality jpg images to Bill Oehlke to help build a website useful to many people.