Culiseta arenivaga is a species of mosquito in the family Culicidae found on Fraser Island, Queensland, Australia, in the Australasian biogeographic realm.

[1][2][3] The holotype and paratype specimens were collected in 1967 by Dr. Elizabeth N. Marks who described the new species the following year.

[1] The thorax is a bright light reddish brown, with bare submedian stripes on the scutum and scattered fine black narrow curved scales and bristles on either side.

[1] The abdomen is generally dark-scaled with purplish reflections, with a pale sternite.

[1] The type specimens, all females, were collected during overcast and showery conditions in a forest of hoop pine (Araucaria cunninghamil) planted in carrol (Backhousia myrtifolia) scrub and in close proximity to a fresh water creek fringed by rainforest.