Odonata observations on the Chagos Archipelago, British Indian Ocean Territory: a review and update

6 Odonata species have been previ- ously recorded from the island atolls of the Chagos Archipelago. 4 of these were recorded during 1996, together with another 2 spp. that were new to the Chagos. Past records are reviewed and updated with the records from the 1996 expedition to give a detailed distribution of the spp. within the Archipelago. The origins of the Chagos Odon. are briefly discussed, together with the habitats occurring on the Archipelago.