Elga is a dragonfly genus consisting of two species. The genus belongs to the subfamily Brachydiplacinae and was described in 1909 by Friedrich Ris. The previously undescribed species Elga leptostyla served as the generotype. The range extends from Panama to Perú and Brazil.
Elga species are comparatively small dragonflies, reaching lengths between 26 and 28 millimetres. The abdomen and thorax are black. On the sides of the thorax and on the segments one to seven there are yellowish spots. The cerci are almost cylindrical. Their wings are dark and very broad. It differs from the other genera in that the compound eyes do not touch.
The imagines of the genus Elga live along running waters within forests.
The following species are included in the genus Elga:
- Elga leptostyla
- Elga newtonsantosi
- Garrison, von Ellenrieder, Louton: Dragonfly Genera of the New World. The Johns Hopkins University Press, Baltimore 2006, ISBN 0801884462, p. 239(PDF file).