While there are many types of insects that find a way into one’s home, house beetles constitute the largest group of their kind. And while many are merely nuisance pests, others can cause substantial damage if not discovered and stopped in time.We start with the Longhorned beetle. Ranging in size from ½”-1.5,” they grow and develop inside trees or logs. Since they will never invade a home on their own, the only way this can occur is if larva-infested firewood is carried inside. These house beetles are harmless and should not be harmed or destroyed, but taken outside if discovered in the home.