Perithemis rubita spec. nov., a new dragonfly from Ecuador (Anisoptera: Libellulidae)

P. rubita sp.n, (holotype <J, allotype $; Fla St. Coll. Arthropods, Gainesville, USA) from Lake Taracoa nr Primavera, Napo Prov., Ecuador, is described and illustrated. It is closely related to P. thais Kirby and P. cornelia Ris, but differs from both in having 2- or 3-celled forewing triangles, 3-celled forewing subtriangles, and red venation proximal to the level of the pterostigma. P. rubita was found in shady lowland tropical swamp forest adjacent to eutrophic lakes near the Napo River. The egg and second instar larva are described.