Those wasps sure do their job! I have now seen two hornworms this season, one at the CSA farm and I just found one on one of my tomato plants. But both of them looked just like the picture, covered in white pupae and not moving at all....
I looked up what the adults look like
and I don't really remember seeing them. But if I ever do I will say thank you!
Here's a different picture and it says they are 1/10 to 1/4 of an inch long, so no wonder I don't notice them too much.
The adults feed on the nectar from the flowers of weeds and flowers of the daisy (Chrysanthemum) and carrot (Umbellifers) families.
Another good reason to keep carrots, dill, fennel, parsley and queen anne's lace around and let some flower! (As well as they are host plants for swallowtail butterflies).