Tropical America is currently experiencing the establishment of a new apex insect predator, the Paleotropical dragonfly Hemianax ephippiger (Odonata: Aeshnidae). H. ephippiger is migratory and is suggested to have colonised the eastern Neotropics by chance Trans-Atlantic displacement. We report the discovery of H. ephippiger at three new locations in the Caribbean, the islands of Bonaire,…
Detailed descriptions and illustrations are provided of the ultimate instar larvae of Argia medullaris and Argia variegata from Colombia. The principal features are outlined and compared with other species. Argia medullaris differs from other species of the genus by the parallel width of the lateral gills and prominent ligula; the A. variegata larva can be…
Adult female and ultimate stadium larva of Mesagrion leucorrhinum are formally described and illustrated based on material from three locations in Antioquia, Meta and Cundinamarca Departments, Colombia. The species is sexually dimorphic. The ♀ is distinguishable from other related genera by a pair of notches in the prothoracic anterior lobe and shares with Heteropodagrion and…
Orthemis sibylla is shown to be a junior synonym of O. ambirufa, based on a comparison of the holotype male of O. ambirufa with voucher specimens in the UMMZ identified as O. sibylla by Ris and specimens of this species from French Guiana and Venezuela in the RWG collection. Diagnostic characters of the male holotype…