Dichomeris leucostena is a moth in the family Gelechiidae. It was described by Thomas de Grey, 6th Baron Walsingham, in 1911. It is found in Mexico (Guerrero).[1]
The wingspan is about . The forewings are brownish fuscous, darker on the basal third than beyond it, with a broad darkened oblique shade parallel with the termen at three-fourths, and a small dark spot about the upper angle of the cell. There is a broad white band along the costa, including at its origin the whole base of the wing, except for a short dark streak along the extreme costa, and gradually attenuate to its apex at the commencement of the costal cilia. The hindwings are pale greyish.[2]