Stockwellius fasciatus Anderson, a new genus and new species of Litosomina, is described from Cerro Campana, Panama. The genus and species are characterized by large size (22 mm), rhomboidal scutellum, elytral pattern with band of condensed golden micropilosity, toothed femora, dorsal apex of rostrum deeply medially emarginate, and the short, dorsally humped rostrum with an elongate patch of dense, golden micropilosity laterally below the dorsal hump. Only a single adult female collected in 1985 is known from this popular collecting locality. No information on natural history is available. A revised key to the genera of Neotropical Litosomina is presented.