“This is a bat tick, Ornithodoros kelleyi. They can sometimes get into homes when people have bats in their attics. They normally bite only bats, but on rare occasions, they will bite people, such as when they accidentally stray away from their bat hosts, or when bats have been driven away and excluded from attics where they used to roost.
They are not known to transmit diseases to humans. If you keep finding them in your home, you likely have a bat colony in your house, or very close by.”