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Members of the genera Neoxestus Crotch (1876) and Xalpirta, n. gen., are revieewed. Neoxestus is an endemic Chlean genus of flightless species. Xalpirta has 9 species restricted to southern South American, most of which are found only in Chile. New species described are Neoxestus cauquenes, N. lucile, N. nahuelbuta, N. nonguen, N. norma, Xalpirtaelsa, X. stellaris, X. arnetti, and X. peckorum. A new name, Xalpirtaguerini, nom. nov., is proposed for the species Triplaxbicolor Guerin (1952). Diagnoses, keys to species, maps and illustrations are provided for the genera and species.