Except for catalog listings, Aleochara repetita Sharp, from Panamá and Brazil (Pará), has not been studied since its original description in 1887. Here, we record it again from Pará and two additional Brazilian states, Distrito Federal and Paraná. After examination of the type material, the species is transferred to the subgenus Xenochara Mulsant and Rey. Aleochara repetita is very similar to Aleochara opacula Bernhauer, from which it differs by the strongly sinuate and deeply U-shaped posterior margin of tergite VIII of the female and the spermatheca with a somewhat globose chamber. Here, for the first time, the male and female genitalia of the species are illustrated.