| Summary: | The Neotropical <i>Mycotretus</i> Lacordaire, 1842 is one of the largest and most widespread genera of the Erotylidae, encompassing more than 200 described species. Among the species with a similar body coloration, there is a “group„ of six valid species—called here the “tiger„ <i>Mycotretus</i>—that possess several pronotal and elytral black spots, as follows: <i>M. tigrinus</i> (Olivier, 1792); <i>M. multimaculatus</i> Taschenberg, 1870; <i>M. centralis</i> Arrow, 1909; <i>M. tigrinoides</i> Mader, 1942; <i>M. tigripennis</i> Mader, 1942; and <i>M. prioteloides</i> Mader, 1942. Different from any other <i>Mycotretus</i> with spots, the spots of the “tiger„ <i>Mycotretus</i> are numerous and are not bilaterally symmetrical in pattern. Here, new geographical records, diagnoses and redescriptions are provided for <i>M. tigrinus</i>, <i>M. centralis</i>, <i>M. tigrinoides</i>, <i>M. tigripennis</i> and <i>M. prioteloides</i>, including the first descriptions of their male and female terminalia. Lectotypes are designated for <i>M. multimaculatus</i>, <i>M. centralis</i>, and <i>M.</i> <i>leopardus</i>. <i>Mycotretus multimaculatus</i> and <i>M. tigrinus pardalis</i> Crotch, 1876 are proposed as new junior synonyms of <i>M. tigrinus</i>. Additionally, the authorship of the name <i>M. leopardus</i> is attributed to Crotch, 1876, because he was the first author to provide a description for that taxon, and the synonymy of <i>M. leopardus</i> and <i>M. conspersus</i> (Germar, 1824) with <i>M. tigrinus</i> (Olivier, 1792) is confirmed.
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