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

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Species Exomala orientalis - Oriental Beetle

Same beetle - Exomala orientalis Oriental Beetle (Anomala orientalis)? - Exomala orientalis ID Needed - Exomala orientalis Beetle 1893 - Exomala orientalis Scrab beetle - Exomala orientalis Exomala orientalis Beetle - Exomala orientalis Scarab - Exomala orientalis
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 Rutelinae (Shining Leaf Chafers)
Tribe Anomalini
Genus Exomala
Species orientalis (Oriental Beetle)
Other Common Names
Asiatic Beetle
Synonyms and other taxonomic changes
Anomala orientalis (Waterhouse, 1875)

Phyllopertha orientalis Waterhouse 1875:108
Blitopertha orientalis (Waterhouse), authors
Exomala orientalis (Waterhouse), Baraud 1991, Piattella and Sabatinelli 1994
7-11 mm (1)
Elytra each with 6 deeply grooved striae between humeral umbone (swollen area - striae don't continue over top of swelling) and suture (midline); intervals (area between striae) subequal (almost equal), subsutural (adjacent to suture) interval not much broader or multipunctate; variously marked but often with dark fasciate spots or bands - rarely all black. Pronotum immaculate to black, with or without paired maculae (darkened region).
Introduced from Asia. Asia, Hawaii, eastern coast of the United States from Maine to Georgia, Wisconsin and Missouri. Still spreading in the U.S. It arrived in the United States in the 1920s.
larvae are found in the soil under lawns
adults are occasionally found on flowers such as rose and hollyhock blossoms
adults emerge in late June and July
larvae feed on grass roots just beneath the surface of the ground
adults feed very little
Life Cycle
In mid-summer, eggs are laid in the soil, up to a depth of about 6 inches. These eggs hatch 3 to 4 weeks later and the young grubs ascend and feed on the grass roots near the surface. In late October and November, they descend 12 inches to overwinter. In April, they resurface and resume feeding until the first of June when they go down to a depth of about 6 inches to pupate. They pass through a prepupal period of about 6 days, then pupate, and 2 weeks later the adults emerge. There is one generation each year, although a few individuals do not transform with the others, therefore requiring 2 years for their development. [from Govt. of Connecticut site; see below]
Often considered Exomala sp.
Internet References
common name reference; PDF doc [Asiatic Beetle] (Turfgrass Information File, Michigan State U.)
Discovery in Indiana via Purdue Entomology.
Works Cited
1.Revision of the Scarabaeidae: Anomalinae. 3. A key to the species of Anomala of America north of Mexico
R.W. Potts. 1977. The Pan-Pacific Entomologist, 53: 129-134.