''Ariadna bicolor'' is a

tube-dwelling spider Tube-dwelling spiders (Segestriidae) are a family of araneomorph spiders first described by Eugène Simon in 1893. It consists of five genera, two large and widespread, '' Segestria'' and ''Ariadna'', and three smaller genera, '' Citharoceps'', ...

. Found in North America, the spider's

cephalothorax The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind. (The terms ''prosoma'' and ''opisthosoma'' are equivalent to ''cepha ...

and legs are yellowish-brown and its

abdomen The abdomen (colloquially called the belly, tummy, midriff, tucky or stomach) is the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. The abdomen is the front part of the abdominal segment of the torso. ...

is purplish-brown. John Henry Comstock said that the habitats of the species are remarkable. He brought the spiders from

Ithaca Ithaca most commonly refers to: *Homer's Ithaca, an island featured in Homer's ''Odyssey'' *Ithaca (island), an island in Greece, possibly Homer's Ithaca *Ithaca, New York, a city, and home of Cornell University and Ithaca College Ithaca, Ithaka ...

and made them a home that had blocks nailed together that each had a hole. The spiders used the man-made habitat as a nest. In a test about what species of spider replied the fastest to odors, ''Ariadna bicolor'' responded slowly. When they weren't in their tubes, they responded in 63 seconds to five oils. When they were in their tubes, they didn't respond to the odors at all.

References

Segestriidae Spiders described in 1842 Spiders of North America {{Araneomorphae-stub