I first thought these were some type of small wasp, but they are ants! In spring, winged ants will emerge to start new colonies. The female will become the queen of a new colony. Prenolepis imparis (Hymenoptera: Aculeata: Vespoidea: Formicidae: Formicinae: Plagiolepidini). Conway Robinson Memorial State Forest, Prince William County, VA 07 April 2013