Thirty-two species of Mangora are found in the region under consideration. Three temperate species extend their ranges into northern Mexico, three Mexican species extend into the Southwest, and four species extend into South America. Only one species, M. melanocephala from Central America and South America, is both widespread and common. One species is found in the West Indies, including Trinidad. Of the 32 species, 15 are new. Six new synonyms are found. A few synapomorphies place Mangora close to Araneus.