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Subfamily Polycaoninae

Primitive-looking Beetle - Melalgus confertus Primitive-looking Beetle - Melalgus confertus Another beetle that has me stumped.  ID, please. - Melalgus plicatus Another beetle that has me stumped.  ID, please. - Melalgus plicatus Backyard - Polycaon stoutii Large Beetle at porchlight - Polycaon stoutii Bostrichidae? - Melalgus Bostrichidae? - Melalgus
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)
Superfamily Bostrichoidea (Carpet, Powder-post and Death-watch Beetles)
Family Bostrichidae (Horned Powder-post Beetles)
Subfamily Polycaoninae
Explanation of Names
Polycaoninae Lesne 1896
Numbers
2 genera, both represented in our area(1)(2)
Range
warmer Americas & se. Asia(2)
Works Cited
1.World catalogue of Bostrichidae (Coleoptera)
Borowski J., Węgrzynowicz P. 2007. Mantis, Olsztyn, 247 pp.
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.