Geographic location of the bug: Central PA
Time: 01:29 PM EDT
Your letter to the bugman: Is this poisonous? What type of caterpillar is this?
How you want your letter signed: Jeff
This is a Milkweed Tussock Moth Caterpillar and it poses no threat to humans unlike other caterpillars that are known to sting. Insects that feed on milkweed are able to incorporate toxins which make them distasteful or possibly even toxic to predators that eat them.