The species of Gigantombra and Angulopis encountered in the Caca ulandia area of central Rondonia, Brazil, are reviewed. These include ten species (all new) of Gigantombra (G. microserrata, G. dl:vergens, G. quadramacula, G. ampla, G. fuscafascia, G. silva, G. rondonia, G. obscura, G. pelplexa, G. pUlpura) and one new species of Angulo pis (A. tenuis). Thecla sangala Hewitson (1868) is recognized as having priority over Theela autoelea Hewitson (1863-1878 [1877]), new synonym. Rondonia continues to appear as a center ofthecline endemism and to provide abundant examples of sibling species diversity
