''Eudesmia arida'', the arid eudesmia moth, is a moth of the family Erebidae. It was described by Skinner in 1906. It is found from Arizona to Texas and in Mexico.
Its wingspan is 23–30 mm. The forewings are dark gray to blackish with a broad transverse yellow band in the median area and a narrow yellow band in the subterminal area. The hindwings are blackish distally and yellow basally. Adults have been recorded on wing from June to October.
The larvae feed on lichens.