Jalmenus aridus

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Subclassis: Pterygota
Divisio: Neoptera
Subdivisio: Endopterygota
Superordo: Panorpida
Ordo: Lepidoptera
Subordo: Glossata
Infraordo: Heteroneura
Divisio: Ditrysia
Sectio: Cossina
Subsection: Bombycina
Superfamilia: Papilionoidea
Series: Papilioniformes
Familia: Lycaenidae
Subfamilia: Theclinae
Tribus: Zesiini
Genus: Jalmenus
Species: J. aridus

The Inland Hairstreak or Desert Blue (Jalmenus aridus) is a butterfly of the Lycaenidae family. It is only known from the area near Kalgoorlie in Western Australia, and is considered to be endangered species

The wingspan is about 25 mm.

The larvae feed on the leaves and flowers of Senna nemophila and Acacia tetragonophylla.

The Caterpillars are attended by the ant species Froggatella kirbii.