After mating, the females will lay single eggs near their host trees, and the caterpillars must find their proper host on their own. Host plants include: woody legumes such as black locust (Robinia pseudacacia), honey locust (Gleditsia triacanthos), and false indigo (Amorpha species). Also some herbaceous legumes such as Glycyrrhiza species.
The young caterpillars live in a folded leaf shelter, while the older ones live in a nest of silked-together leaves. And, according to Harper’s index of animal facts: The distance a silver-spotted skipper caterpillar can propel its own feces (called frass in the insect world) is 5 feet.
To read more interesting animal facts, though I warn that some are a little disturbing, see:
http://www.harpers.org/subjects/Animal/SubjectOf/Fact
References:
Butterflies and Moths of North America