Dryobius sexnotatus
Six-banded longhorn beetle

Key Characteristics

The six-banded longhorn beetle is a medium-sized, 0.75 to 1 inch (1.9-2.5 cm) elongated black beetle distinctly marked with 8 yellow bands: 2 on the head, 2 on the pronotum, and four on the elytra (outer wing coverings). The antennae are long and curving.

Status and Rank

  • State Status: T
  • State Rank: SH
  • Global Rank: GNR


No known occurrences in Michigan

Updated 5/15/2018. Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.


It inhabits mature hardwood forests with large, overmature trees (especially elm, maple, and beech used by wood-boring larvae). Feeding continues until after trees die and bark has fallen off.

Natural Community Types


For each species, lists of natural communities were derived from review of the nearly 6,500 element occurrences in the MNFI database, in addition to herbarium label data for some taxa. In most cases, at least one specimen record exists for each listed natural community. For certain taxa, especially poorly collected or extirpated species of prairie and savanna habitats, natural community lists were derived from inferences from collection sites and habitat preferences in immediately adjacent states (particularly Indiana and Illinois). Natural communities are not listed for those species documented only from altered or ruderal habitats in Michigan, especially for taxa that occur in a variety of habitats outside of the state.

Natural communities are not listed in order of frequency of occurrence, but are rather derived from the full set of natural communities, organized by Ecological Group. In many cases, the general habitat descriptions should provide greater clarity and direction to the surveyor. In future versions of the Rare Species Explorer, we hope to incorporate natural community fidelity ranks for each taxon.


Avoid large-scale timber harvests and retain large, overmature trees and dead snags in floodplains and mesic forests.

Active Period

Active from fourth week of April to fourth week of September

Survey Methods

Actively search trees by looking under loose bark for adults.

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at http://mnfi.anr.msu.edu/explorer [Accessed Sep 25, 2018]


Survey References

Technical References

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