Loxostege oberthuralis is a moth in the Crambidae family. It was described by Fernald in 1894. It is found in North America, where it has been recorded from southern California, southern Arizona and southern Nevada. The wingspan is about 32 mm. The forewings are pale pale sulphur yellow, marked with reddish brown. The hindwings are white with a fuscous terminal line. Adults have been recorded on wing from April to May and from August to September.