Three new species of Acanthocinini are described: Pseudosparna swifti sp. nov., from Costa Rica; Pseudosparna paulista sp. nov., from Brazil; and Xenocona chulumani sp. nov., from Bolivia. A new genus of Acanthocinini is described to include Pseudolepturges caesius Monné & Monné, 2007, and it is included in a previous key.