SPOOKY TIME HERDERS. Welcome back to the episode that will give you the willies! Deinopis, also known as net-casting spiders, gladiator spiders and ogre-faced spiders,[2] is a genus of net-casting spiders that was first described by W. S. MacLeay in 1839.[3] Its distribution is widely tropical and subtropical. They catch their prey using a specially spun "net". The name is derived from the Greek δεινός (deinos), meaning "fearful", and opis, meaning "appearance", referring to their ogre-like faces. The spelling "Dinopis" is also found, but is regarded as an "unjustified emendation".[1]