About Segestria senoculata (Linnaeus, 1758)
Segestria senoculata, commonly called the snake-back spider, is a spider species in the family Segestriidae. This species has a Palearctic distribution. Individuals reach a body length of approximately 9 mm. Its common name comes from a row of black spots along the back of its grey abdomen; these spots are thought to resemble the scale patterns on some snakes. In some specimens, these markings fuse together into a single solid band. The spider has an elongated, shiny dark brown carapace, and pale brown legs marked with darker rings. Like other species in Segestriidae, this spider builds a tubular web within a crevice. It darts out of the web to capture prey that crosses trip lines that fan out from the tube's entrance. In Great Britain, Segestria senoculata is the only recorded prey for the pepsid spider wasp Dipogon subintermedius.
