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Photo#339210
Mordellistena pustulata - Mordellina pustulata

Mordellistena pustulata - Mordellina pustulata
Medford, (~25 miles east of Philadelphia, PA) Burlington County, New Jersey, USA
August 17, 2009
According to Liljeblad, Mordellistena pustulata is supposed to have "Posterior tibiae with three short, oblique, parallel ridges, subapical not included; first segment of posterior tarsi with three, second with two ridges." (or 3,3,2, as I like to express them) "In very small individuals there may be only two ridges and a rudimentary third ridge."

Size: "2-4mm to apices of elytra".
I measure about 2.5mm for this one (in tuck position as imaged). So I guess that's on the "very small" end of the scale.

I think I see the 3,3,2 ridge pattern (remember, don't count the ridge on or just in front of the apex of each segment - often more resembles row of seta extending beyond apex. This beetle as a large subapical one on the tibia), although the last ridge of each segment appears somewhat reduced - nearly "rudimentary".

Comments welcome :)

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Mordellistena pustulata - Mordellina pustulata Mordellistena pustulata - Mordellina pustulata