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TaxonomyBrowse
Info
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Species Megacyllene robiniae - Locust Borer

Locust Borer - Megacyllene robiniae Black & Yellow Beetle - Megacyllene robiniae Locust Borer - Megacyllene robiniae Locust Borer - Megacyllene robiniae Locust Borer - Megacyllene robiniae Locust borer - Megacyllene robiniae Locust Borer - Megacyllene robiniae - Megacyllene robiniae Long horned face mask beetle - Megacyllene robiniae
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)
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Longhorn and Leaf Beetles)
Family Cerambycidae (Longhorn Beetles)
Subfamily Cerambycinae
Tribe Clytini
Genus Megacyllene
Species robiniae (Locust Borer)
Explanation of Names
Megacyllene robiniae (Forster 1771)
robiniae = 'of Robinia' (refers to a host tree)
Size
11-28 mm(1)
Identification
has all yellow elytral markings (1)
metepisternum (region betw. 2nd & 3rd hind leg) nearly completely covered in yellow pubescence (2)
Range
widely dist., wherever people have planted Black Locust (Robinia pseudoacacia).(3)(1)
Habitat
Adults common on goldenrod Aug-Oct
Season
mostly Aug-Oct (BG data)
Food
Larvae feed on Black Locust (Robinia pseudoacacia). (Honey Locust (Gleditsia triacanthos) is not affected.)
Adults feed on pollen, particularly goldenrod (Solidago spp.).
Life Cycle
Eggs are laid in the fall. Newly emerged larvae hibernate under bark, tunnel in spring, making tunnels about 10 cm long and 6 mm wide, pupate late Jul/early Aug; adults emerge late Aug-Sep.
Larva & pupa
Remarks
Considered a serious pest of Black Locust; previously weakened or damaged trees are often killed by the larvae. Previously confined to the native range of Black Locust in the northeast, it has spread with the trees throughout the US and parts of Canada. Black Locust is used for reclamation and similar projects where trees are likely to be stressed and thus more vulnerable to damage.
See Also
Placosternus difficilis (Chevrolat)
- Range: so. US
sutural one-third of elytron with distinct, abrupt depression margined by a slight carina (or ridge) (2)
Internet References
Utah State Univ. Extension (Karren & Roe 2002)
Works Cited
1.Field Guide to Northeastern Longhorned Beetles (Coleoptera: Cerambycidae)
Douglas Yanega. 1996. Illinois Natural History Survey.
2.Illustrated Key to the Longhorned Woodboring Beetles of the Eastern United States
Steven W. Lingafelter. 2008. Coleopterists Society.
3.Checklist of beetles (Coleoptera) of Canada and Alaska. Second edition
Bousquet Y., Bouchard P., Davies A.E., Sikes D.S. 2013. ZooKeys 360: 1–402.