Hemaris diffinis, June 17, 2006, Joan F. Rickert
Hemaris diffinis, immature larva, August 20, 2006, Joan F. Rickert
Joan writes, "The caterpillar is (I think) a Snowberry Clearwing (Hemaris diffinis). I took this picture in Green Bay, Brown County, Wisconsin, on August 20. It was on a virburnum shrub. There were two of them."
Based on foodplant, lateral lines and yellow granules on the first segment which projects over the head, I would agree with Joan's determination. Use your browser "Back" button to return to the previous page.