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For Insects, Spiders & Their Kin
For the United States & Canada

Genus Polyphylla - Lined June Beetles

Lined June Beetle - Polyphylla occidentalis Polyphylla sp - Polyphylla diffracta - male Ten-lined June Beetle - Polyphylla decemlineata - male polyphylla decemlineata  - Polyphylla decemlineata Polyphylla variolosa  Polyphylla crinita or P. decemlineata? - Polyphylla decemlineata - female Polyphylla decemlineata - Ten-lined June Beetle - Polyphylla decemlineata Polyphylla decemlineata
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 Melolonthinae (May Beetles and Junebugs)
Tribe Melolonthini
Genus Polyphylla (Lined June Beetles)
Synonyms and other taxonomic changes
=Macranoxia Crotch 1873, Polylamina Hardy 1974
32 spp. in our area, 34 in the New World (all in the nominotypical subgenus)(1); 4 spp. range north into Canada(2)
25-35 mm
Large June beetles, most with obvious white scales on elytra often forming stripes. Species identification often difficult
Holarctic; in the New World, so. Canada to Honduras(1)(3), most species in w. NA
Forests and orchards. Some species are found in sand dunes.
Early summer
Adults feed on tree foliage; larvae feed on roots of shrubs/trees
Life Cycle
Eggs are laid on soil near host plants; larvae reach maturity in 2-3 years and pupate in underground chambers
Adults come to lights
Print References
La Rue, D.A. 1998. Notes on Polyphylla Harris with a description of a new species. (Coleoptera: Scarabaeidae: Melolonthinae). Insecta Mundi 12(1 & 2): 23–37. (4)
Young, R.M. 1988. A monograph of the genus Polyphylla Harris in America north of Mexico (Coleoptera: Scarabaeidae: Melolonthinae). Bulletin of The University of Nebraska State Museum, Lincoln. 11(2): 1-116. (5)