Five new species of Trigonopeltastes Burmeister and Schaum from Central America with new country records for other New World Trichiini (Coleoptera, Scarabaeidae, Cetoniinae).

Five new species of Trigonopeltastes Burmeister and Schaum, 1840 are described: Trigonopeltastes arborfloricola sp. n. from Nicaragua, Trigonopeltastes formidulosus sp. n. from Costa Rica, Trigonopeltastes henryi sp. n. from Costa Rica, Trigonopeltastes mombachoensis sp. n. from Nicaragua, and Trigonopeltastes warneri sp. n. from Belize and Guatemala. An updated key to species of Trigonopeltastes is presented. Trigonopeltastes nigrinus Bates, 1889 and Trigonopeltastes carus Bates, 1889 are placed in synonymy with Trigonopeltastes geometricus Schaum, 1841, syn. n.. The males of Trigonopeltastes aurovelutinus Curoe, 2011 and Trigonopeltastes simplex Bates, 1889 are described for the first time. New country records are given for the following: Giesbertiolus ornatus Howden, 1988: Costa Rica; Paragnorimus sambucus Howden, 1970: Guatemala; Trichiotinus bibens (Fabricius, 1775): Canada; Trigonopeltastes archimedes Schaum, 1841: Guatemala and Costa Rica; Trigonopeltastes frontalis Bates, 1889: Belize, Guatemala, and Honduras; Trigonopeltastes glabellus Howden, 1988: Guatemala; Trigonopeltastes geometricus Schaum, 1841: Honduras; Trigonopeltastes sallaei sallaei Bates, 1889: Guatemala and Honduras; Trigonopeltastes simplex Bates, 1889: Mexico; Trigonopeltastes variabilis Howden, 1968: Honduras.