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Xanthogaleruca luteola is the scientific name for the Elm Leaf Beetle. These beetles are about five millimeters in length, and are usually yellow or orange with two black stripes and a spot on either side of their back. The Elm Leaf Beetle was introduced to the United States from Europe around 1834, and has since spread to most of the country. Adult Elm Leaf Beetles and their larvae are pests, feeding on elm tree foliage.

Photo Courtesy of: Oklahoma State University Department of Entemology and Plant Pathology http://www.ento.okstate.edu/4H-FFA/coleoptera2.htm

  Source: R. Arnette, Jr. 1980. How to know the beetles.