Judolia instabilis is a species of beetle in the family Cerambycidae. It was described by Haldeman in 1847.Bezark, Larry G. A Photographic Catalog of the Cerambycidae of the World . Retrieved on 22 May 2012. Their appearance ranges from black with yellow spots to full black in color. They range in size from 6 mm to 15 mm in length. They inhabit the U.S and Canada.
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