Caterpillar ID? greyish blue body, hump on back end

Sorry the pic is fuzzy, I had to use my phone cause my camera is broken
Its also got a yellow stripe down the side of its body and on its head. a white stripe down its back and tiny white spots all over in a pattern. body is sectioned (I dont know what else to call it). no hairs.

 

This is a shot in the dark, heterocampa guttivitta. I do better with plants than bugs.

Jerry