Fritziella Marsh and shawius marsh are two distinctive monotypic doryctine genera described from south America".Fritziella superficially resembies hecabolus Curtis, but can be identified by the absence of a ventral tooth or tubercule at the base of the hind coxae, and by the hind femora not being swollen. shawius can be easily distinguished from all other doryctine genera in the neotropical region by its yellow andswollen parastigma in the fore wing. currently, both genera are known to occur in brazil and one or two undescribed species of shawius have been mentioned fro argentina. rhoptrocentrus marshall includes three current valip species and is known from the Nearctic, palearctic, oriental and Australian regions, but there are no references of the genus for the neotropical region