Pavement ants have two nodes (bumps between middle and rear body sections). They are light to dark brown with fine grooves lining the head and thorax. Legs and antennae are lighter than the rest of the body. Workers are all one size.
Pavement ants produce small mounds at the entry of their nests. These nests are often located outdoors under stones, pavement cracks, wood, next to buildings and under building foundations. They can enter homes through cracks in the concrete; they will nest in the walls, under floors and around sinks. Pavement ants typically swarm in spring after a rain storm and they can swarm indoors.