Three new species of the Onthophagus chevrolati species group are described from Mexico: O. civitasorum Moctezuma and Halffter, sp. n. (Durango); O. neofuscus Moctezuma and Halffter, sp. n. (Jalisco); and O. inecolorum Moctezuma and Halffter, sp. n. (Puebla). The dorsal habitus and genital structures of the new species are figured. The aedeagus and endophallite copulatrix of the holotype of O. pseudofuscus are dissected and figured by the very first time. The identification keys and distribution maps for the O. aureofuscus and O. fuscus species complexes are updated.

墨西哥描述了Onthophagus chevrolati物种组的三个新物种：O。civitasorum Moctezuma和Halffter，sp.。。（Durango）；O. neofuscus Moctezuma和Halffter，sp。。（哈利斯科州）；和O. inecolorum Moctezuma和Halffter，sp。。（普埃布拉）。弄清了新物种的背性习性和生殖器结构。在阳茎和模式标本的endophallite交配O. pseudofuscus解剖并通过第一次想通。为识别键和分布图O. aureofuscus和O.鲇种复合物被更新。