Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Genus Calopteron

Net-winged Beetle - Calopteron reticulatum Banded Net-wing - Calopteron reticulatum Calopteron reticulatum? - Calopteron reticulatum End Band Net-wing (Calopteron terminale) - Calopteron terminale Calopteron terminale - End Band Net-wing? - Calopteron net-winged beetle? - Calopteron terminale Net-winged Beetle - Calopteron Calopteron reticulatum or terminale - Calopteron - male - female
Classification
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 Elateriformia)
Superfamily Elateroidea (Click, Firefly and Soldier Beetles)
Family Lycidae (Net-winged Beetles)
Subfamily Lycinae
Tribe Calopterini
Genus Calopteron
Explanation of Names
Calopteron Guérin-Méneville 1830 [Laporte de Castelnau 1838 in(1)]
'beautiful wing'
Numbers
3 spp. in our area, ~150 total(1)
Size
9-18 mm(2)
Identification
Large, boldly-marked net-winged beetles with broad, delicate elytra, flared out towards the rear.
Keys to spp. in(3)(pl. XXV) and(4) may not apply to all specimens
Range
New World; in our area, eastern (NB-FL to MB-TX)(1)(5)
Habitat
adults on flowers and vegetation, esp. near water(2)
C. reticulatum found on goldenrods, etc. in late summer, also in woodlands; C. discrepans and terminale are woodland species.
Season
late spring & summer(2)
Food
adults take nectar; larvae prey on small arthropods under bark, or perhaps slime molds, fungi and fermenting plant juices.
Life Cycle
Eggs laid on bark of dead or injured trees. Larvae feed on insects under bark and pupate there.
Larvae found in rotten logs, under loose bark and, sometimes in soil or leaf litter, usually in groups.
1 and 2. Larvae. 3. Pupa. 4. Mating, female and 2 males
Remarks
Like other members of the Lycidae family, they contain a toxic compound, an acetylenic acid. They are rejected by thrushes, wolf spiders, and orb-weaving spiders. T. Eisner, Defensive Chemistry of Lycid Beetles and of Mimetic Cerambycid Beetles that Feed on Them.

Some moths mimic these beetles
See Also
Another lycid, presumably part of the same mimicry complex


A cerambycid that feeds on lycid beetles


Moths that apparently mimic these beetles: Pyromorpha (esp. P. dimidiata), Lycomorpha (esp. L. pholus)

Another possible mimic Neoalbertia constans

And, perhaps

Internet References
Chemoecology. Eisner, T et al. Defensive Chemistry of Lycid Beetles and of Mimetic Cerambycid Beetles that Feed on Them
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.Beetles of Eastern North America
Arthur V. Evans. 2014. Princeton University Press.
3.A Manual of Common Beetles of Eastern North America
Dillon, Elizabeth S., and Dillon, Lawrence. 1961. Row, Peterson, and Company.
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.Checklist of beetles (Coleoptera) of Canada and Alaska. Second edition
Bousquet Y., Bouchard P., Davies A.E., Sikes D.S. 2013. ZooKeys 360: 1–402.