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No, I don't think you are so far off, it depends a little bit on the size of the larva.
If it is a quite big larva, it could be something like a Leucozona larva, if it is small, it could be Paragus as well, although I think the setae on the body of a Paragus are relatively bigger!.
Characteristics are not clearly visible on this picture, especially on the back side of the larva.
For Leucozona, at the back side of the larva should be 2 pairs of setae on short papillae, for Paragus there should be a row of 4 setae at the tip of the anal segment!
Greetings,