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BugGuide Gathering
Smoky Mountains
University of Tennessee Biological Field Station
August 8-10, 2008
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Photos from the last gathering (Minnesota 2007)

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Genus Polyphylla - Lined June Beetles

Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Longhorn, Leaf and Snout Beetles)
Superfamily Scarabaeoidea (Scarab, Stag and Bess Beetles)
Family Scarabaeidae (Scarab Beetles)
Subfamily Melolonthinae (May Beetles and June Bugs)
Tribe Melolonthini
Genus Polyphylla (Lined June Beetles)
Other Common Names
Ten-lined June Beetle (T. decemlineata)
Numbers
Nearctica.com lists 28 species.
Arnett, p. 417, lists 29 species (1)
Size
Circa 25-35 mm
Identification
Large June beetles, most with obvious white scales on elytra often forming stripes. Species identification may be difficult?
Range
Most species in western North America. P. decemlineata in west and north-central states. P. diffracta in oak/pinyon pine forests of southwest. P. crinita widespread in west.
Habitat
Forests, orchards
Season
Early summer, to July
Food
Adults feed on tree foliage, thus sometimes called "chafers".
Life Cycle
Eggs are laid on soil near host plants. Larvae hatch, burrow down and feed on roots of shrubs, trees, require 2-3 years to reach maturity. Pupation is in underground chambers. Adults come to lights.
Print References
Harpootlian, P. occidentalis & comes (2)
Papp, p. 187, figs. 636-637, P. crinita (3)
Powell and Hogue, p. 276, late 14c--P. decemlineata (4)
Borror and White, p. 144, plate 7--P. decemlineata (5)
Arnett pp. 177-178 (6)
Milne, p. 561, fig. 242--P. decemlineata (7)
Swan and Papp, p. 433, fig. 902--P. crinita (8)
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
By Ross H. Arnett
2.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
By Phillip J. Harpootlian
3.Introduction to North American Beetles
By Charles S. Papp
4.California Insects
By Jerry A. Powell, Charles L. Hogue
5.Peterson Field Guides: Beetles
By Richard E. White
6.How to Know the Beetles
By Ross H. Arnett, N. M. Downie, H. E. Jaques
7.National Audubon Society Field Guide to Insects and Spiders
By Lorus and Margery Milne
8.The Common Insects of North America
By Lester A. Swan, Charles S. Papp