RESUMO: The Cis tricornis species group has been regarded as an artificial aggregation of seven described species, predominantly Neotropical, with one species from the Nearctic region. These species only marginally conform to the diagnostic limits of the genus Cis Latreille, 1797 and partially resemble the genus Grossicis Antunes-Carvalho, Sandoval-Gómez & Lopes-Andrade, 2012. Here, we review the species previously included in the tricornis group and describe two new genera: Sacis gen. nov., with the type species Sacis guarani (Borlini & Lopes-Andrade, 2023) comb. nov., also comprising Sacis amazonicus (Lopes-Andrade & Sandoval-Gómez, 2017) comb. nov., Sacis caipora (Borlini & Lopes-Andrade, 2023) comb. nov., and Sacis tricornis (Gorham, 1883) comb. nov. from the Neotropical region; and Urupecis gen. nov., with the type species Urupecis delicatulus (Jacquelin-Duval, 1857) comb. nov., also including Urupecis nasicornis (Reitter, 1878) comb. nov. from the Neotropical region and Urupecis miles (Casey, 1898) comb. nov. from the Nearctic region. Four species are redescribed: S. tricornis, U. delicatulus, U. miles and U. nasicornis. Updated diagnoses are provided for all studied species, along with a diagnostic chart summarizing the morphological characteristics of the genera, and identification keys for the new genera and their included species. Additionally, lectotypes are designated for Ceracis tricornis Gorham, 1883, and Cis nasicornis Reitter, 1878.