Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Spring 2021 gathering in Louisiana, April 28-May 2. Here's how to add your images.

National Moth Week 2020 photos of insects and people.

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

Discussion, 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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama


Genus Orius

Little biter - Orius tristicolor Bug April 28 - Orius vicinus Orius insidiosus Black plant bug - Orius insidiosus Orius insidiosus Orius Insidious flower bug??  It is the only match I've found - Orius insidiosus Orius - possibly tristicolor? - Orius tristicolor
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Heteroptera (True Bugs)
Infraorder Cimicomorpha
Superfamily Cimicoidea
Family Anthocoridae (Minute Pirate Bugs)
Tribe Oriini
Genus Orius
Explanation of Names
Orius Wolff 1811
8 spp. (of which two introduced) in our area(1)
Revision of our species in(2); key to Canadian species in(3)
Cosmopolitan(4); widespread in NA
can be found anywhere its food is available; common in agricultural settings and weedy areas
insect eggs, aphids, thrips, spider mites, and other small insects
Life Cycle
Development from egg to adult takes at least 20 days; multiple generations per year
Used as biocontrol agents. May bite humans.
Print References
Shapiro J.P., Shirk P.D., Reitz S.R., Koenig R. (2009) Sympatry of Orius insidiosus and O. pumilio (Hemiptera:Anthocoridae) in north central Florida. Florida Entomologist 92: 362-366 (Abstract)
Internet References
Works Cited
1.First North American records for the Palearctic Orius majusculus (Reuter) (Hemiptera: Heteroptera: Anthocoridae)
Henry, T.J. 2008. Proceedings of the Entomological Society of Washington 110(4): 953-959.
2.The genus Orius of the western hemisphere (Hemiptera: Anthocoridae)
Herring, J.L. 1966. Annals of the Entomological Society of America, 59 (6):, 1093-1109.
3.The Insects and Arachnids of Canada Part 4: The Anthocoridae of Canada and Alaska
Leonard A. Kelton. 1978. Supply and Services Canada.
4.Australian Faunal Directory
5.Biological control: A guide to natural enemies in North America