Arulenus is a genus of pygmy grasshopper. , it consists of two species:
Both species are endemic to Mindanao in the Philippines.
Characteristic features of this genus include: the lack of tegmina and of alae, a smooth pronotum with large, slightly wrinkled spines on its discus, and outwardly turned lateral paranotal lobes.
Carl StÃÂ¥l circumscribed Arulenus in 1877 for the species A. validispinus and A. punctatus, which StÃÂ¥l described in the same paper. In 1887, Ignacio BolÃÂvar transferred A. punctatus to its own, new genus Hirrius, giving it the name Hirrius punctatus. Arulenus would be considered a monospecific genus until 2016 with Josip Skejo and Joy Honezza S. Caballero's description of Arulenus miae.