Long-bodied cellar spiders are not proven to be poisonous. There is a myth that their venom is one of the deadliest, and that their short fangs keep them from injecting this fatal venom into humans. However, there is no research proving this statement to be true.
Long-bodied cellar spiders are considered nuisance pests, probably more so because of their vast webs being an eyesore in homes and commercial buildings. Historically, cellar spiders are not known to bite humans and, therefore, do not pose a health threat.
By: Pest World