PROC. ENTOMOL. SOC. WASH. 81(2), 1979, pp. 304-320 THE GENUS EUDIAGOGUS (COLEOPTERA: CURCULIONIDAE: LEPTOPIINAE), WITH TWO NEW SPECIES ON THE WEED SESBANIA (LEGUMINOSAE) Rose Ella Warner Systematic Entomology Laboratory, IIBIII, Agric. Res., Sci. and Educ. Admin. USDA, % U.S. National Museum of Natural History, Washington, D.C. 20560. Abstract. — In the New World genus Eiidiagogus (Coleoptera: Curculion-idae), two new species, pogo from Georgia and maryae from Florida, are described; the lectotype of E. pallidevittatus is designated; and E. albo-limbatus is synonymized under £. rosenschoeldi. A new key, illustrations, distributions, and host records are given for all six species of Eiidiagogus. The adults of these species defoliate Sesbania, a weed that competes with soybeans. The species of the weevil genus Eiidiagogus live almost exclusively on species of Sesbania (Leguminosae). Sesbania spp., commonly known as hemp sesbania, Drummond rattlebox, purple sesbania, and bagpod sesba-nia, are very troublesome weeds competing with soybeans on several hundred thousand acres in the Mississippi River Delta of Arkansas, Loui-siana, and Mississippi. These weeds produce large quantities of seeds which persist in the soil for years. In 1840, Schoenherr described the new genus Eudiagogus and included three species, episcopalis, type by original designation, from Brazil, rosen-schoeldi Fahraeus from Nova Aurelia [New Orleans, Louisiana, USA] and pulcher Fahraeus from Mexico. Lucas, in 1859, described E. pallidevittatus from Peru. In a discussion of the genus Horn (1876) mentioned but did not formally name two varieties of pulcher, one from Florida and one from Texas. Horn's variety from Florida is described below as a new species. Also a species from Georgia is described as new. Eudiagogus Schoenherr Eudiagogus Schoenherr, 1840:307 [type-species: Promecops episcopalis Schoenherr 1834:164, by original designation].