Perioristica is a genus of moth in the family Gelechiidae. It contains the species Perioristica chalcopera, which is found in Mexico (Guerrero). The wingspan is about 10 mm. The forewings are bronzy-brown, overlaid on the basal half with a greenish grey iridescent sheen, the outer edge of which is obliquely terminated a little before the middle of the costa, and throws out a short white streak along the cell. Above this is a slender, oblique, detached white streaklet, and an outwardly oblique white costal streak, more or less connected by scattered whitish scales at its apex with the apex of the median streak, and again to the apex of a similar streak a little above the dorsum. At four-fifths is a second, short, straight white costal streak, loosely connected by scattered scales, at its ap