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Genus Trichiotinus

Beetles - Trichiotinus rufobrunneus 6013390 Trichiotinus affinis? - Trichiotinus viridans beetle - Trichiotinus texanus Trichiotinus - Trichiotinus viridans Striped Chafer - Trichiotinus assimilis Bug_beetle - Trichiotinus assimilis Trichiotinus affinis bee mimic beetle - Trichiotinus assimilis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
Superfamily Scarabaeoidea (Scarab, Stag and Bess Beetles)
Family Scarabaeidae (Scarab Beetles)
Subfamily Cetoniinae (Fruit and Flower Chafers)
Tribe Trichiini
Genus Trichiotinus
Other Common Names
Hairy Flower Scarabs, Flower Beetles, Bee-Like Flower Scarab (used by Papp (1) for T. piger)
Synonyms and other taxonomic changes
Trichiotinus Casey 1915
8 spp. in our area(2)
7-12 mm
Very hairy on abdomen--the hairs often poking out prominently from under the elytra. Perhaps mimic bees (pattern, buzzy flight).
Species identification requires close examination [key to se. spp. in(3)]. Range info below can be useful. Visually there are two 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 and 4 shiny, with scattered large punctures, look same as slightly elevated and convex intervals 3 and 5, and pygidium distinctly and closely rugose; piger - very similar to affinis, but intervals 2 and 4 finely and densely punctate, less shiny than distinctly elevated and convex intervals 3 and 5; pygidium medially distinctly setose, noncretaceous surface with irregular rugae usually separated by less than or equal to 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(4)]; viridans - TBA
Nearctic genus (US and adjacent Canada)(2): 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:
Open areas with flowers near woodlands
Spring-summer (Apr-Aug)
Adults take pollen and/or nectar from such flowers as Queen Anne's Lace, New Jersey Tea, hydrangea, Dogwood, and Indian Hemp. Also feed on vegetative parts?
Life Cycle
Larvae in rotting wood(5), adults visit flowers
Print References
Hoffman, Clarence (1935). The Biology and Taxonomy of the Genus Trichiotinus (Scarabaeidae-Coleoptera). Entomologica Americana 15(4): 134-209 (BHL link)
Works Cited
1.Introduction to North American Beetles
Charles S. Papp. 1984. Entomography Pubns.
2.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.
3.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
Phillip J. Harpootlian. 2001. Clemson University Public Service.
4.The Beetles of Northeastern North America, Vol. 1 and 2.
Downie, N.M., and R.H. Arnett. 1996. The Sandhill Crane Press, Gainesville, FL.
5.Peterson Field Guides: Beetles
Richard E. White. 1983. Houghton Mifflin Company.