''Mimachrostia costafasciata'' is a moth of the family

Erebidae The Erebidae are a family of moths in the superfamily Noctuoidea. The family is among the largest families of moths by species count and contains a wide variety of well-known macromoth groups. The family includes the underwings ('' Catocala'') ...

first described by Michael Fibiger in 2008. It is known from northern Vietnam. Adults have been found in September. The wingspan is about 15 mm. The forewing is relatively narrow and light brown, with prominent black spots only at the costa and a hardly visible narrow, beige reniform stigma. The antemedian and postmedian lines are well marked only at the costa. The subterminal line is indistinct. The terminal line is marked by brown interveinal spots. The hindwing is greyish brown with an indistinct discal spot. The underside of the upper forewing is part brownish, but otherwise grey brown, without a pattern. The underside of the upper hindwing is brownish, although the lower part is light grey, with a postmedian line and a discal spot.

References

* Micronoctuini Moths described in 2008 {{Micronoctuini-stub