What yellow caterpillars eat dill?

The black swallowtail (Papilio polyxenes) larva is the yellow caterpillar eating dill. The caterpillar stage of the butterfly in question prioritizes feeding upon the flowers and the seeds of such Umbelliferae family plants as carrots, celery, dill, fennel, parsley and Queen Anne's lace. The caterpillar ranges in color from brown-purple and white upon hatching to leaf green with black and white bands and yellow spots as later instars.