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)
Synonyms and other taxonomic changes
Philochloenia Dejean 1833
Anaeretes Dejean 1836
Dichelonycha Kirby 1837
Explanation of Names
27 spp. in our area(1)
, Evans & Smith(2005)
Elongated and rather flattened scarabs, usually metallic green or brown and covered with a silky pubescence (3)
. Other characters:
first abdominal sternite
mostly visible, not covered by metacoxae
claws cleft at tip
The genus can be separated into two groups ("sulcate" vs. "non-sulcate") based on the presence of a moderately deep longitudinal groove ("sulcus") on the pronotum versus pronotum with only a faintly impressed medial line or none at all.
Photos illustrating some of these characters:
Nearctic: Transcontinental, Canada to Mexico(5)
On shoots and young leaves of herbaceous or woody plants, sometimes on flowers(3)
Typically, late spring(3)
; Apr-Jun in SC(4)
Adults feed in spring on the leaves of trees, frequently conifers, sometimes causing conspicuous defoliation. Larvae feed on roots(6)
Life cycle takes 2-3 years(6)
At least some are both nocturnal and diurnal(3)
; several species come to lights.
LeConte, J.L. (1856) Synopsis of the Melolonthidae of the United States. Jour. Acad. Nat. Sci. of Philadelphia, (2)3, 225-288. (Full Text
Horn, G.H. (1876) Revision of the United States of Ochodaeus and other genera of Scarabaeidae. Trans. Amer. Entomol. Soc., 5,177-197. (Full Text
Fall, H.C. (1901) Notes on Dichelonycha
, with descriptions of new species in other genera. Trans. Amer. Entomol. Soc., 27, 277-310. (Full Text
Saylor L.W. (1945) Revision of the scarab beetles of the genus Dichelonyx
. Bull. Brooklyn Entomol. Soc. 40(5): 137-158. (Full Text
Cornell, James F. (1972). A Taxonomic Review of the Beetle Genus Dichelonyx
Harris in North America (Scarabaeidae: Melolonthinae). Ph.D. Dissertation, Oregon State University, Corvallis. 253 pp. (Full Text
|1.||The Scarabaeoid Beetles of Nebraska|
Brett C. Ratcliffe & M.J. Paulsen. 2008. University of Nebraska State Museum, Vol 22, 570 pp.
|2.||Field Guide to Beetles of California|
Arthur V. Evans and James N. Hogue. 2006. University of California Press.
|3.||A Manual of Common Beetles of Eastern North America|
Dillon, Elizabeth S., and Dillon, Lawrence. 1961. Row, Peterson, and Company.
|4.||Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina|
Phillip J. Harpootlian. 2001. Clemson University Public Service.
|5.||The Beetles of Northeastern North America, Vol. 1 and 2.|
Downie, N.M., and R.H. Arnett. 1996. The Sandhill Crane Press, Gainesville, FL.
|6.||Western Forest Insects|
Furniss, R.L. and Carolin, V.M. 1977. 1977. U.S.D.A. Forest Service Misc. Publ. 1339.