Perittia tectusella is a moth in the Elachistidae family. It was described by Sruoga in 1997. It is found in Central Asia, where it has been recorded from Tajikistan. The wingspan is 6.1-7.7 mm. The forewings are dark greyish-brown, mottled by whitish basal parts of the scales. There are two blurred whitish spots near the dorsum. The hindwings are light brownish-grey. Adults are on wing from late July to early September.