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

See Moth submissions from National Moth Week 2023

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

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


Genus Trichiotinus

Flower Scarab - Trichiotinus rufobrunneus Trichiotinus - Trichiotinus viridans Trichiotinus larva - Trichiotinus lunulatus Beetle - Trichiotinus assimilis Scarab - Trichiotinus 3035804 Tricky - Trichiotinus texanus insectsmall - Trichiotinus Trichiotinus  - Trichiotinus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
Superfamily Scarabaeoidea
Family Scarabaeidae (Scarab Beetles)
Subfamily Cetoniinae (Fruit and Flower Chafers)
Tribe Trichiini
Genus Trichiotinus
Other Common Names
Hairy Flower Scarabs
Synonyms and other taxonomic changes
Trichiotinus Casey 1915
8 spp., all in our area(1)
7‒12 mm
Very hairy on abdomen —hair often poking out prominently from under the elytra.
key to se. spp. in (2)
Species identification requires close examination. Range info can be useful. Two inormal groups:
Pronotum brown or black, elytra brown/black center, white stripes along sides: assimilis —mostly northern and western; affinis —similar to piger but elytral intervals 2 & 4 shiny, with scattered large punctures, look same as slightly elevated and convex intervals 3 & 5, and pygidium distinctly and closely rugose; piger —like affinis but intervals 2 & 4 finely and densely punctate, less shiny than distinctly elevated intervals 3 & 5; pygidium medially distinctly setose, noncretaceous surface with irregular rugae usually separated by ≤0.2 mm in median area; rufobrunneus —very brown, FL endemic; texanus TBA
Pronotum green, elytra brown to green in varying degrees, with no or weak white bars: bibens —elytra brown with green tinge, flies in mid-late summer; lunulatus —elytra brighter green than in bibens, flies in late spring and early summer [overlooked in(3)]; viridans TBA
Nearctic genus (US and adjacent Canada)(1): T. affinis se. Canada to FL‒AL; T. assimilis - Canada; n. & w. US (ME‒ID‒NM‒AZ); T. bibens e. US (NY‒MI to n.GA‒AL); T. lunulatus se. US (MD‒FL to OK‒TX); T. piger Canada; e. US (ME‒NE to FL‒AZ); T. rufobrunneus FL; T. texanus KS‒TX‒NM; T. viridans Canada; upper midwest (MI‒WI‒KS)
Range maps:
Larvae in rotting wood(4), adults visit flowers (Queen Anne's Lace, New Jersey Tea, Hydrangea, Dogwood, Indian Hemp…)
Print References
Hoffman C. (1935) The biology and taxonomy of the genus Trichiotinus (Scarabaeidae-Coleoptera). Entomologica Americana 15: 134‒209 (Full text)
Works Cited
1.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
2.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
Phillip J. Harpootlian. 2001. Clemson University Public Service.
3.The Beetles of Northeastern North America, Vol. 1 and 2.
Downie, N.M., and R.H. Arnett. 1996. The Sandhill Crane Press, Gainesville, FL.
4.Peterson Field Guides: Beetles
Richard E. White. 1983. Houghton Mifflin Company.