Cheiracanthiidae
(Prowling Spiders)

Picture ID 16104

Picture of Cheiracanthiidae (Prowling Spiders) - Female - Ventral

Comments & ID Thoughts

Hi folks,

Have been having mysterious bites everytime I am on my upper outdoor deck. This *ahem...lady? has been spotted a few times coming down from the ceiling on her web at night. Finally caught *her and was thinking she is a yellow sac spider? I am concerned about the possibility of a nest somewhere and if these things take a nip atcha are they mildly painful and stupid itchy and take forever to heal? All help appreciated! Thank you

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ItsyBitsy

Hi, multiple bites are usually from blood sucking insects. You seem to have guessed the right family and may well have the right species. When they’re found indoors they’re usually Cheiracanthium mildei. Outdoors there are a few other similar looking species in the family. I don’t know how you would react to a bite, reactions can vary.

ItsyBitsy

If you’re falling asleep and rolling on them or swatting them it could happen. Or maybe it’s biting flies. I would just relocate them a good distance from the house. If you have any leaf litter or weeds nearby clearing that out too could reduce their numbers around the house.

Additional Pictures

Picture of Cheiracanthiidae (Prowling Spiders) - Dorsal Enlarge Picture
Picture of Cheiracanthiidae (Prowling Spiders) - Dorsal Enlarge Picture
Picture of Cheiracanthiidae (Prowling Spiders) - Male - Dorsal Enlarge Picture
Picture of Cheiracanthiidae (Prowling Spiders) - Dorsal Enlarge Picture