Autosticha naulychna is a moth in the Autostichidae family. It was described by Meyrick in 1908. It is found in Sri Lanka. The wingspan is 15-16 mm. The forewings are rather dark purplish-grey with an orange-yellow basal patch, the outer edge running from one-third of the costa to one-fourth of the dorsum, the extreme costal edge dark fuscous. There is a small round yellow-whitish spot in the disc at two-thirds. The hindwings are rather dark grey.