Image database of the ants (Hymenoptera: Formicidae) of Cowling Arboretum and McKnight Prairie, Carleton College, Northfield, Minnesota

Taxa are listed alphabetically by species, species group or subgenus, genus, tribe, and finally subfamily. Although the taxanomic rank of tribe is not very meaningful (Bolton 1994, 1995), and was removed in the Dolichoderinae because it was meaningless (Shattuck 1994), we nevertheless group genera by tribe (when possible) because it is interesting to see how these taxa at least historically have been understood to be related. Full face and profile views of the three castes (worker, female reproductive, and male reproductive) are shown when available for each species.

All nomenclature follows Bolton (1995) except Formica incerta Buren, which Creighton (1950) made a junior synonym of F. nitidiventris Emery. James Trager identified specimens which we collected as F. incerta and F. nitidiventris. We follow his identification.

Note that the species shown in these images are not definitively identified but are shown to give an idea of what species in each particular genus or species group looks like. The identities of the Myrmica species pictured are especially unclear because no good key is available. Myrmica specimens were preliminarily identified using material deposited by Adre Francouer in the U. of Minnesota insect collection, although a revision of the genus is yet to be published.
Formica pergandei, a facultative slave-maker, and F. nitidiventris, one of its common slaves

Subfamily Dolichoderinae Forel

Tapinoma Foerster

Subfamily Formicinae Latreille

Tribe Camponotini Forel

Camponotus Mayr

Tribe Formicini Latreille

Formica Linnaeus

neogagates species group

pallidefulva species group

rufa species group

sanguinea species group

Tribe Lasiini

Acanthomyops Mayr

Lasius Fabricus

Paratrechina Motschoulsky

Prenolepis Mayr

Subfamily Myrmicinae Lepeletier de Saint-Fargeau

Tribe Crematogastrini Forel

Crematogaster Lund

Tribe Formicoxenini Forel

Leptothorax Mayr

Tribe Myrmicini Lepeletier de Saint-Fargeau

Myrmica Latreille

Tribe Pheidolini Emery

Aphaenogaster Mayr

Pheidole Westwood

Tribe Solenopsidini Forel

Monomorium Mayr

Solenopsis Westwood

Tribe Stenammini Ashmead

Stenamma Westwood

Subfamily Ponerinae Lepeletier de Saint-Fargeau

Tribe Ponerini Lepeletier de Saint-Fargeau

Ponera Latreille

Please send any questions or comments regarding these pages to Tim Linksvayer (
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