Jalmenus daemeli, the Daemel's blue, Dämel's blue or emerald hairstreak, is a butterfly of the family Lycaenidae, and was first described in 1879 by Georg Semper[1][2] It is endemic to the Australian states of New South Wales and Queensland, where it is found in coastal areas.

[1] It is named after Eduard Dämel, the collector the type series (with Amalie Dietrich).

[3] The larvae feed on a wide range of plants, including Acacia species, Eucalyptus melanophloia and Heterodendrum diversifolium.

[3] The caterpillars are attended by the ant species Iridomyrmex rufoniger.

This Theclinae-related article is a stub.