Found on its host Black Locust, Robinia pseudoacacia. Length 5 mm. With its orange and black coloration and net-like pattern on the elytra, it sure looks to be a mimic of the very toxic Lycid beetles (Lycidae).BugGuide accountPCCA20080717-3806A
Leaf-mining locust-beetle, Odontota dorsalis, a beetle, b larva, c pupaFigure 226 in Sanderson, E. D. and C. F. Jackson. 1912. Elementary Entomology. Boston, Ginn and Company. Available through the Biodiversity Heritage Library: http://dx.doi.org/10.5962/bhl.title.29213