Ants (Family Formicidae)
of Orange County, California (and nearby places)

(Click on images or names to open). Yellow background, exotic species. Useful note on Terminology

Photographed and compiled by Peter J. Bryant (
Department of Developmental and Cell Biology, 
University of California, Irvine, CA
and Ron Hemberger

Species lists in this family from "Spatial patterns of occurrence of the invasive argentine ant (Linepithema humile) and associated impacts on the native ant community in coastal southern California" by Milan Mitrovich, Nature Reserve of Orange County and Robert Fisher, Tritia Matsuda, and Krista Pease, US Geological Survey. November, 2006. Asterisk indicates exotic species. Anatomy
Subfamily Dolichoderinae

Dorymyrmex insanus

Pyramid Ant, Dorymyrmex sp.

Pyramid Ant, Dorymyrmex sp.

Forelius pruinosus
Argentine Ant, Linepithema humile

California Velvety Tree Ant, Liometopum occidentale

Odorous House Ant,
Tapinoma sessile
Dorymyrmex bicolor
Dorymyrmex insanus
Forelius foetidus
Forelius pruinosus
Linepithema humile*
Liometopum occidentale
Tapinoma sessile
Subfamily Ecitoninae    

Legionary Ant,
Neivamyrmex (californicus?)

Neivamyrmex californicus
Neivamyrmex nigrescens
Neivamyrmex opacithorax

Subfamily Formicinae

Rover Ant,
Brachymyrmex patagonicus

Carpenter Ant,
Camponotus dumetorum

Carpenter Ant, Camponotus ochreatus, worker female

Carpenter Ant, Camponotus ochreatus, male

Carpenter Ant, Camponotus ochreatus, queen

Field Ant,
Formica francoeuri

Field Ant,
Formica fusca group

Field Ant,
Formica moki

Honeypot Ant,
Myrmecocystus sp.

Winged Ant,
Nylanderia vividula

False honey Ant,
Prenolepis imparis

Winged Ant,
Pseudomyrmex sp.

Winged Ant,
Liometopum occidentale ?

Brachymyrmex depilis
Camponotus sayi
Camponotus semitestaceus
Camponotus spp. CA-
Camponotus vicinus
Formica francoeuri
Formica moki
Formica neogagates group
Formica xerophila

Myrmecocystus kennedyi
Myrmecocystus mexicanus
Myrmecocystus mimicus
Myrmecocystus semirufus
Myrmecocystus testaceus
Paratrechina c.f. terricola
Polyergus breviceps
Prenolepis imparis
Subfamily Myrmicinae
Acrobat Ant, Crematogaster sp.
Harvester Ant, Messor andrei (worker)

Winged Ant, Messor sp. (male)

Winged Ant, Myrmecina americana

Harvester Ant, Pogonomyrmex californicus subnitidus

Red Imported Fire Ant,
Solenopsis invicta, worker

Red Imported Fire Ant,
Solenopsis invicta, male

Desert Ant, Veromessor pergandei
Cardiocondyla ectopia*
Crematogaster californica
Crematogaster coarctata
Crematogaster hespera
Crematogaster mormonum
Cyphomyrmex wheeleri
Messor andrei
Messor stoddardi
Monomorium ergatogyna
Monomorium minimum
Monomorium pharaonis*
Myrmecina americana
Pheidole cerebrosior
Pheidole clementensis
Pheidole hyatti
Pheidole vistana
Pogonomyrmex rugosus
Pogonomyrmex subnitidus
Solenopsis amblychila
Solenopsis aurea
Solenopsis molesta
Solenopsis xyloni
Temnothorax andrei
Temnothorax nevadensis
Temnothorax nitens
Temnothorax sp CA-
Subfamily Pseudomyrmecinae      

Pseudomyrmex apache