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Genus Phyllophaga - May Beetles

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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 Scarabaeoidea (Scarab, Stag and Bess Beetles)
Family Scarabaeidae (Scarab Beetles)
Subfamily Melolonthinae (May Beetles and Junebugs)
Tribe Melolonthini
Genus Phyllophaga (May Beetles)
Other Common Names
Adults: June Bugs, June Beetles; larvae: White Grubs, True White Grubs
Synonyms and other taxonomic changes
Phyllophaga Harris 1827
Explanation of Names
Greek for 'leaf-eater'
Numbers
>400 spp. n. of Mex. (1), ~840 spp. total (2); at least 54 spp. in FL (3); 35 species in Nebraska (4)
Size
Adult 12-25 mm, larva 20-45 mm
Identification
Revision of our fauna in (5); key to SC species (6)
Species are best identified by examination of genitalia (both males and females can be used). Some external details that can aid in identification [based on a comment by Blaine Mathison] are:

1) complete antennomeres (9 vs 10 segments)
2) dorsal habitus (especially with good view of clypeus)
3) middle and hind tibial spurs
4) middle and hind tarsal claws

These will not always guarantee an ID, but can be very helpful.

Male genitalia:


Female genitalia:
Range
throughout the Americas(2)
Food
Larvae: roots and decaying vegetation in the soil
Adults: leaves of various plants
Print References
(7)
Riley, E.G. 1988. The Phyllophaga of Louisiana (Coleoptera: Scarabaeidae). Unpublished Thesis, Louisiana State University, Baton Rouge. xiv + 436 pp.
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.Generic Guide to New World Scarab Beetles (by Brett Ratcliffe and Mary Liz Jameson)
3.The Scarab Beetles of Florida
Robert Woodruff. 1973. Florida Department of Agriculture and Consumer Services.
4.The Scarabaeoid Beetles of Nebraska
Brett C. Ratcliffe & M.J. Paulsen. 2008. University of Nebraska State Museum, Vol 22, 570 pp.
5.May Beetles of the United States and Canada
Luginbill and Painter. 1953. USDA Technical Bulletin No. 1060.
6.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
Phillip J. Harpootlian. 2001. Clemson University Public Service.
7.Revision of the scarabaeid beetles of the phyllophagan subgenus Listrochelus of the United States, with discussion...
L.W. Saylor. 1940. Proceedings of the United States National Museum, 89(3095): 59-130.