Dichomeris ostensella is a moth in the Gelechiidae family. It was described by Walker in 1864. It is found in Guyana and Brazil (Amazonas). Adults are coal-black, the forewings with a deep cupreous-black patch in the disc and a submarginal band of the same colour. There are two intermediate black cinereous-bordered dots and a few minute black marginal dots. The hindwings are dark cupreous.