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Photo#23631
Black and Red Ant - Formica obscuriventris

Black and Red Ant - Formica obscuriventris
Milton, Massachusetts, USA
July 6, 2005
Size: 6mm

Could be F. integra
I don't see any hint of the erect setae on the middle and hind tibiae that characterize F. obscuriventris. Also, what I can see of the clypeal cross section doesn't appear boxy enough. A higher-res image would help, if you have one, Tom.

 
Replaced with larger image
Hope this shows enough detail.

species
More specifically, this is Formica obscuriventris.
To see more great photos of ants of all sorts of species, see http://myrmecos.net/

 
Formica obscuriventris
Thanks for the identification. It matches up nicely with the Myrmecos.net picture.

Formica sp.
This is probably a species of Formica, some of which build huge mounds of fir needles.

 
Formica
Thanks for the ID Eric.

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