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Photo#177283
Western Black Widow? - Latrodectus hesperus - female

Western Black Widow? - Latrodectus hesperus - Female
St. George, Washington County, Utah, USA
April 12, 2008
Small black widow found amoung garden stones.

Images of this individual: tag all
Western Black Widow? - Latrodectus hesperus - female Western Black Widow? - Latrodectus hesperus - female

Nice images!!
I assume that this is a female?

 
Female...
Yes, this was a female. Luckily she was turning in the web so it enabled me to get a shot of both sides.

 
Cool!
A minor point - you can click the "female" box on submission of a photo (or you can "edit" it after submitting) to clarify that point... Hope that someone will be able to confirm Western Black Widow.

In the mean time, not sure if you looked at the INFO tab for Lactrodectus - it has a lot of great info. on widow spiders, incl. that "juveniles of both sexes resemble the male", so this must be an adult female?

http://bugguide.net/node/view/1999

 
Edited.
I edited it to show adult female and I appreciate the information you posted. I did look through the guide photos but found nothing with the weird back coloring. The hourglass certainly depicts western black widow, I think.

 
Subadult.
This might well be a subadult female. I have not seen mature western widows with any bold markings other than the hourglass.

 
Gone the next day.
She was not in the web the next day and there was a skeleton of a spider in there but it didn't appear to be as large as the widow. Her web was still intact. Maybe she was molting somewhere? She was rather small for any black widows I had seen before.

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