Triarius is a genus of skeletonizing leaf beetles in the family Chrysomelidae. There are about seven described species in Triarius. They are found in North America and Mexico.[1][2][3][4]
Riley, Edward G.; Clark, Shawn M.; Seeno, Terry N. (2003). Catalog of the leaf beetles of America north of Mexico (Coleoptera: Megalopodidae, Orsodacnidae and Chrysomelidae, excluding Bruchinae). Special Publication No. 1. The Coleopterists' Society. ISBN978-0-9726087-1-8.