Cytological notes on five dragonfly species from Uruguay

Notes on karyotype morphology are given and micrographs are provided of the following 5 spp. from Uruguay, South America, 3 of which (asterisked) have not been previously examined cytologically: Coenagrionidae: Ischnura fluviatilis Sel. (n $ = 14, mT)\ Libellulidae: Perithemis mooma Kirby (n $ = 13, m), Erythrodiplax atroterminata Ris* (2n $ = 26), E. chromoptera Borror* (n <J = II, m), and E. nigricans (Ramb.)* (n = 13, m).