Perilestes Castor and P. Pollux, New Dragonflies from Ecuador, with Notes on P. Kahli (Odonata: Lestidae)

The following descriptions and notes are on material collected by the Indian crew of William Clarke-Macintyre on the headwaters of the Rio Napo, a tributary of the Amazon in the Province of Oriente, Ecuador. It is a region of swift jungle streams at an elevation of 500 to 800 meters above sea-level.