An account of the chactid scorpions of Brazilian Amazonia is given and a list of all recorded scorpions in the region is provided. Broteochactas skuki n.sp. is described. The hitherto unknown male of Brotheas paraensis SIMON is described, and one female of Guyanochactas gougei (VELLARD) new combination is described. The known distribution of Brotheas amazonicus LOURENCO, 1988 is expanded to Rondonia and Roraima States