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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 Callidium violaceum - Violet Tanbark Beetle

Metallic Blue Beetle. - Callidium violaceum Metallic Blue Beetle. - Callidium violaceum Metallic Blue Beetle. - Callidium violaceum Blueish Purple Beetle - Callidium violaceum Unknown Bark Beetle? - Callidium violaceum - female Callidium violaceum Callidium violaceum Callidium violaceum
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)
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Longhorn and Leaf Beetles)
Family Cerambycidae (Longhorn Beetles)
Subfamily Cerambycinae
Tribe Callidiini
Genus Callidium
Species violaceum (Violet Tanbark Beetle)
Synonyms and other taxonomic changes
=janthinum LeConte; may be synonymous with C. testaceum (R.A. Haack, pers. comm. to =v=)
Explanation of Names
Callidium violaceum (Linnaeus 1758)
extremely variable: 8-18 mm in the native range[9-15 mm in NA per(1)]
adventive in NA (ne. US & adjacent Canada) - Map (1)(2)(3)(4); native to the Palaearctic
under bark of dry conifers(1)
NB: not mentioned in(5)(6)
Internet References
Works Cited
1.Field Guide to Northeastern Longhorned Beetles (Coleoptera: Cerambycidae)
Douglas Yanega. 1996. Illinois Natural History Survey.
2.Diversity of non-native terrestrial arthropods on woody plants in Canada
Langor D.W., DeHaas L., Foottit R.G. 2009. Biological Invasions 11(1): 5-19.
3.Distributional and host records of Cerambycidae (Coleoptera) associated with Cupressaceae in New England,New York, and New Jersy
Maier C.T. . 2009. Proceedings of the Entomological Society of Washington 111(2): 438-453.
4.Global Biodiversity Information Facility (GBIF)
5.Guide to insect borers in North American broadleaf trees and shrubs
Solomon, J.D. 1995. USDA Forest Service Agriculture Handbook. 735 pp.
6.Exotic bark- and wood-boring Coleoptera in the United States: recent establishments and interceptions
Haack R.A. 2006. Can. J. For. Res. 36(2): 269–288.