Steatoda grossa
(False Black Widow)

Picture ID 75501

Picture of Steatoda grossa (False Black Widow) - Dorsal

Comments & ID Thoughts

took this in house. we did bug bomb before moving in. now these spiders are coming upstairs from the basement. there's a lot of overgrown brush around the house that needs to be removed. spider looks black, but in bright light they look brownish. do you think we can spray on our own or is professional better. thanks for any info.

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ItsyBitsy

The one on the right is a False Black Widow (Steatoda grossa). I can’t see the other well enough to say whether or not it’s the same with certainty. They’re common in homes and not a cause for poison – they prey on less desirable things. If you’re seeing a lot of them you can reduce their numbers by sealing cracks around floors, doors, windows, foundation etc., vacuum everywhere and empty the canister outside.

Additional Pictures

Picture of Steatoda grossa (False Black Widow) - Male - Dorsal Enlarge Picture
Picture of Steatoda grossa (False Black Widow) - Dorsal Enlarge Picture
Picture of Steatoda grossa (False Black Widow) - Male - Dorsal Enlarge Picture
Picture of Steatoda grossa (False Black Widow) - Dorsal Enlarge Picture