Latrodectus
(Widow Spiders)

Picture ID 8126

Picture of Latrodectus (Widow Spiders) - Dorsal,Webs

Comments & ID Thoughts

Hi again, this is the spider from the mail box. Color has somewhat decay after 1 week and RAID spider killer. Is it a better the picture for ID purposes?

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ItsyBitsy

Hi, this is a Widow. Given the condition it’s in I’m not sure if it’s a dark Brown Widow (L. geometricus) or a Western Black Widow (L. hesperus). Both can have striped legs like that.
https://bugguide.net/node/view/442833/bgimage
https://bugguide.net/node/view/1191698/bgimage

Also for future reference Brown Widows have distinctive spiky egg sacs:
https://bugguide.net/node/view/1143026/bgimage

Edit: Leaning Brown Widow, I’d need to spend some more time comparing the two.

ItsyBitsy

Yes, widows can have spots too … they’re usually red or orange though. Yellow sounds more like a Brown Widow.

Western Black Widow: https://bugguide.net/node/view/1279380/bgimage
Southern Black Widow: https://bugguide.net/node/view/970516
Brown Widow: https://bugguide.net/node/view/1127942/bgimage

Additional Pictures

Picture of Latrodectus spp. (Widow Spiders) - Dorsal Enlarge Picture
Picture of Latrodectus spp. (Widow Spiders) - Dorsal Enlarge Picture
Picture of Latrodectus spp. (Widow Spiders) - Male - Dorsal Enlarge Picture
Picture of Latrodectus spp. (Widow Spiders) - Male - Penultimate,Ventral Enlarge Picture