Dichomeris argentenigera is a moth in the Gelechiidae family. It was described by Li, Zhen and Kendrick in 2010. It is found in China (Hong Kong, Hubei). The wingspan is 17-19 mm. The forewings are greyish brown with a silvery reflection and with the costal margin and dorsum dark brown. There are dark brown spots at three-fifths and at the end of the cell and there is a faint dark brown spot at two-thirds at the fold, as well as dark brown fascia extending from near the apex to the tornus. The hindwings are grey.