The brown recluse or fiddleback/violin spider gets its common names from its coloration and reclusive habits or the dark violin/fiddle-shaped marking on the top of the cephalothorax. Members of the genus Loxosceles occur in southern Europe temperate Africa and in North Central and South America.
Adults usually about 1/4"-1/2" (6-12 mm) in body length (L. laets about 1/25mm). color tan to dark brown with a darker fiddle-shaped marking on dorsum or top of cephalothorax whose neck points towards abdomen. Uniquely with 6 eyes arranged in 3 groups of 2 (diads) in a semicircle.
Outside brown recluse spiders are typically found around rocks piles of inner tubes utility boxes woodpiles under bark etc. These spiders have been found in such places as outside rodent bait stations and infesting cedar shake roofs.