The genus Tibraca Stål, 1860 is revised, and some taxonomic changes are introduced. The following species are considered to belong in this genus: Tibraca limbaliventris Stål, 1860, T. similima Barber, 1941, and T. exigua sp.n. (from Argentina). Three other species, formerly placed in Tibraca, are considered respectively: T. obscurata Bergroth, 1914, incertae sedis; Mecocephala fusca (Haglund, 1868), comb.n.; Ogmocoris hypomelas (Burmeister, 1835). The genus Ogmocoris Mayr, 1864 is reinstated.
Heteroptera; Pentatomidae; Tibraca; Ogmocoris gen. reval.; taxonomy