Ants

Common pest species found in New York:

Odorous House Ant

Tapinoma sessile

Size: Workers are 1/8 inch long (3 mm); swarmers are 1/4 inch long (6 mm)

Color: Brown to black

Shape: Slender, segmented body with a narrow waist (no visible nodes), bent antennae, and 6 legs

Legs: 6 legs

Antennae: Elbowed antennae; not clubbed

Body: Narrow waist (petiole) with 1 node that is hidden by the abdomen and is not visible from above

Wings: Swarmers have 2 sets of transparent wings; the forewings are longer than their hindwings

Pavement Ant

Tetramorium caespitum

Size: Workers are 3/16 inch long (4 mm); swarmers are 1/4 inch long (6 mm)

Color: Dark brown to black

Shape: Slender, segmented body with a narrow waist (2 nodes), bent antennae and 6 legs

Legs: 6 legs

Antennae: Elbowed antennae; appears thicker at the tips (3-segmented club)

Body: Narrow waist with 2 nodes; under a microscope you can see tiny grooves on the head and thorax

Stinger: Workers have a small stinger but cannot easily penetrate human skin

Wings: Swarmers have 2 sets of transparent wings; the forewings are longer than their hindwings

Black Carpenter Ant

Camponotus pennsylvanicus

Size: Workers range from 1/4 to 1/2 inch long (6–13 mm); swarmers are 4/5 inch long (20 mm)

Color: Dull black

Shape: Slender, segmented body with a narrow waist (1 node), bent antennae, and 6 legs

Legs: 6 legs

Antennae: Elbowed antennae; not clubbed

Head: Large mandibles that can chew through wood; may bite when threatened

Body: Narrow waist consisting of 1 node between the thorax and abdomen; thorax is smooth and evenly-rounded; abdomen is covered in whitish or yellowish hairs

Wings: Swarmers have 2 sets of yellowish, transparent wings; the forewings are longer than their hindwings