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Voliba psammoessa is a moth in the Crambidae family. It was described by Turner in 1908. It is found in Australia, where it has been recorded from Queensland.
The wingspan is 12-13 mm. The forewings are whitish, finely irrorated with ochreous-fuscous and with dark-fuscous markings. There is a dot on the base of the costa and a fine transverse fascia, as well as a pale-centred discal ring beyond the middle, connected by a fine dentate line with the dorsum. There is also a line from the costa, at first straight, then describing a small outward curve, and ending above the tornus. There is a fine terminal line not reaching tornus. The hindwings are whitish, with a pale-fuscous suffusion towards the apex, containing an obscure fuscous line. There is also a short dark-fuscous streak from the tornus.