Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Macrodactylus subspinosus - Rose Chafer

Rose Chafer - Macrodactylus subspinosus - male Beetles - Macrodactylus subspinosus - male - female Milkweed-eating Beetles - Macrodactylus subspinosus Rose Chafer Beetle - Macrodactylus subspinosus Rose Chafer - Macrodactylus subspinosus - male - female Beetle  - Macrodactylus subspinosus Macrodactylus subspinosus - male Rose Chafer - Macrodactylus subspinosus
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 Macrodactylini
Genus Macrodactylus (Rose Chafers)
Species subspinosus (Rose Chafer)
Synonyms and other taxonomic changes
Macrodactylus subspinosus (Fabricius)
Orig. Comb: Melolontha subspinosa Fabricius 1775
8-10 mm
very similar to and hard to distinguish from M. angustatus, with which it used to be considered synonymous
e. NA (QC-FL to MN-TX); CO & MT records(1) suspect (Art Evans, pers. comm. to =v= 5.iv.2011)
Old fields, gardens, edges with vines
mostly Jun-Jul (BG data), May-Jul in SC(2)
Adult is herbivore, feeds on wide variety of flowers and foliage.
Life Cycle
Adults emerge in early summer and feed on flowers, some leaves. They live for up to 6 weeks. Mating occurs on food sources. Eggs are laid deep (13-15 cm!) in soil and hatch in one to three weeks. Larvae feed on roots and overwinter deep in soil. Pupation in early spring in the soil, just under the surface.
Adults contain cantharadin, can poison chickens, other birds.
Considered a minor pest species
Internet References
Fact sheet - NCSU
Works Cited
1.The Beetles of Northeastern North America, Vol. 1 and 2.
Downie, N.M., and R.H. Arnett. 1996. The Sandhill Crane Press, Gainesville, FL.
2.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
Phillip J. Harpootlian. 2001. Clemson University Public Service.