Iowa Insect Information Notes

Guide to Common Ants in Iowa (wingless workers only)

Guide to Common Ants in Iowa (wingless workers only)

Prepared by Donald R. Lewis and Laura Jesse, Department of Entomology, Iowa State University

This document is also available as an easily-printable PDF.

Pharaoh Ant

Pharaoh Ant, Monomorium pharaonis

1/16 inch; 2 nodes, light yellowish red

12 antenna segments, w/ 3 segment club

Larger Yellow Ant

Larger Yellow Ant, Acanthomyops interjectus

1/4 inch; 1 node, Yellow-orange

Very small eyes

Thief Ant

Thief Ant or Grease Ant, Solenopsis molesta

1/16 inch; 2 nodes

Light brown to yellow

10 antenna segments, w/ 2 segment club

Field Ant

Field Ant, Formica spp.

3/8 inch; 1 node

Brown to black

Thorax silhouette uneven in side view

Odorous House Ant

Odorous House Ant, Tapinoma sessile

1/8 inch; 1 node that is not easily seen

Dark brown to black

Abdomen slopes forward over node

Smaller Carpenter Ant

"Smaller" Carpenter Ant Camponotus nearcticus

1/4 - 1/2 inch; 1 node; Brown; red thorax

Evenly rounded thorax

Pavement Ant

Pavement Ant, Tetramorium caespitum

1/16 to 1/8 inch; 2 nodes

Yellowish red; One pair of spines on thorax

Sculptured lines on head

Carpenter Ant

Carpenter Ant, Camponotus pennsylvanicus

1/2 to 3/4 inch; 1 node


Evenly rounded thorax

Updated 07/14/2005 - 10:41am