Coptotelia nigriplaga is a moth in the Depressariidae family. It was described by Dognin in 1904. It is found in Colombia and Ecuador. The wingspan is 19-20 mm. The forewings are crimson, suffusedly spotted with yellow between the veins and with a rather dark lilac-fuscous band along the costa from the base to three-fifths, then abruptly bent down to the middle of the disc, and again angulated to the costa beyond the middle, its median section including a subcostal spot of groundcolour, and an oval semitransparent white crimson-edged spot in the disc. The costal edge is shortly white before the middle and at three-fourths and the dorsal area more or less spotted indistinctly with fuscous, sometimes with a streak from the disc to the dorsum at one-third. There is an oval semitransparent whi