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Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Species Paratrechina longicornis - Longhorn Crazy Ant

Are these crazy ants?  - Paratrechina longicornis ants with very long antennae, and blue/purple blotches - Paratrechina longicornis P. longicornis? - Paratrechina longicornis Formicidae - Paratrechina longicornis Unknown Ant - Paratrechina longicornis - female Unknown Ant - Paratrechina longicornis - female Paratrechina longicornis? - Paratrechina longicornis Formicidae - Paratrechina longicornis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
Superfamily Formicoidea (Ants)
Family Formicidae (Ants)
Subfamily Formicinae
Tribe Lasiini
Genus Paratrechina
Species longicornis (Longhorn Crazy Ant)
Other Common Names
Slender Crazy Ant(1), Black Crazy Ant, Long-legged Crazy Ant
Explanation of Names
Paratrechina longicornis (Latreille 1802)
longicornis 'long-horned'
Bluish reflections are characteristic
adventive and widespread across so. tier of US states (CA-TX-FL), with (indoor?) records as north to se. Canada [map](2)
may be the world's most widespread ant species (Wetterer 2008); native to the Old World tropics (prob. originated from SE Asia or Melanesia)
Life Cycle
common in houses and seems peculiarly adapted to the interior and immediate vicinity of human habitations(2)
Host species for the ant cricket Myrmecophilus americanus
Print References
Trager JC (1984) A revision of the genus Paratrechina (Hymenoptera: Formicidae) of the continental United States. Sociobiology 9: 51-162.
Wetterer JK (2008) Worldwide spread of the longhorn crazy ant, Paratrechina longicornis (Hymenoptera: Formicidea). Myrmecological News 11: 137-149.
Wetterer et al. (1999) Ecological dominance by Paratrechina longicornis (Hymenoptera: Formicidae), an invasive tramp ant, in Biosphere 2. Fla. Entomol. 82: 381-388.
Internet References
Fact sheet (Nickerson & Barbara 2015)(3)
Works Cited
1.Exotic ants in Florida
Deyrup M., Davis L., Cover S. 2000. Trans. Am. Ent. Soc. 126: 293-326.
2.Ward P.S. (2002-) AntWeb
3.University of Florida: Featured Creatures