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Photo#143221
Common house spider - Parasteatoda tepidariorum

Common house spider - Parasteatoda tepidariorum
Medford, Middlesex County, Massachusetts, USA
September 5, 2007
Size: ~ 2mm
This small spider was seen in a very large web. The image has been rotated 180 degrees for easier identification.

Looks to me like

 
I agree with Ashley
on Achaearanea tepidariorum. This is a very common species. They are all over the exterior of my house, and in my basement, and I usually run across one of these wherever I seem to go. They're cool spiders, though!

 
Thanks
This one was in the woods on a fence post.

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