Psilochorus hesperus is a spider found in cellars and rock boulder nooks in the Northwestern United States and in British Columbia.P. Paquin, D.J. Buckle, N. Dupérré & C.D. Dondale. 2010. Checklist of the spiders (Araneae) of Canada and Alaska. Zootaxa 2461:1-170. Adult males have curved spikes protruding forward from their jaws. Common Spiders of North America] page 178
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