Blodgett Forest, El Dorado Co., California, USA
Lasius pallitarsis differs from all other North American Lasius species in the dentition of the mandible. Specifically, L. pallitarsis sports a small tooth along the inner margin of the mandible, just proximal of the junction of the basal and masticatory faces, and visible here as the tooth closest to the head.
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This image was captured with a Canon EOS D60, with a Canon 65/2.8 MPE 1-5x Macro lens.