Merimnetria ichthyochroa is a moth of the Gelechiidae family. It is endemic to Molokai, Hawaii. The wingspan is about 16 mm. The forewings are rather shining, whitish cinereous (ash gray), but showing a slight ferruginous reflection in certain lights. There is a broad triangular ferruginous costal blotch, commencing at one-fourth, descends outward to the middle of the fold and is then diffused upward to the commencement of the costal cilia, a few dark ferruginous scales about the apex and termen precede the leaden gray cilia which have also in some lights a reddish brown reflection. The hindwings are dark brownish gray.