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Sac spiders, Cheiracanthium sp, are readily recognized by their pale colour (fawn, yellow to yellowish green). A salient feature is the arrangement of the legs, two pairs directed forwards and two pairs backwards with the first pair being much longer than the others. The tips of the legs and the mouthparts are usually darkly coloured.
Sac spiders are commonly found outdoors and only one species C. furculatum is regularly found in houses. There they may spend the day in, for example, folds of curtains, bedding and clothing on a clothesline in a soft silk sac-like retreat.