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Photo#19766
Ant mimic spider? - Castianeira longipalpa

Ant mimic spider? - Castianeira longipalpa
Milton, Massachusetts, USA
June 8, 2005
Size: 5mm
I'm not sure if this is an ant mimic or a sac spider.

Clubionidae
This spider is probably not a true ant-mimic. Those have highly constricted abdomens and hold first pair of legs upward while ambulating. I submitted somthing similar; black, with lightish outer legs

 
Clubionidae
That's what I thought, but wasn't sure when I saw yours and another that had the same basic body shape. Thanks Tom.

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