Scrobipalpa arenaceariella is a moth in the Gelechiidae family. It was described by Powell and Povolný in 2001. It is found in North America, where it has been recorded from California. The length of the forewings is 5.9-6.2 mm for males and 5.1-6.2 mm for females. The ground colour of the forewings are concolorous with a more pronounced indication of brownish lines in the longitudinal wing folds. Sometimes, there is a triad of dark brown stigmata in the cell. The hindwings are pale cinereous. Adults have been recorded on wing in early June and the species probably produces one generation per year.