Neachrostia Hampson

Type species: brunneiplaga Swinhoe, India.

This is another genus consisting of small brown species with some general resemblance to the lithosiine genus Eugoa or the Micronoctuidae, being associated with Tolpia Walker of that family in the current BMNH arrangement. The forewing radial sector veins are reduced to four, with the anterior two arising independently from the cell, and the posterior two being stalked. The hindwing venation is also reduced, with Rs and M1 stalked, M2 weak, and the veins at the posterior angle of the cell reduced from three to two.

The male genitalia are distinctive and share some features with those of Anachrostis, as in the two Japanese species illustrated by Sugi in Inoue et al. (1982). There is similar bilateral asymmetry to the valves, particularly in the slender processes arising from the centre of the costal margin, but the tegumen is shorter, less strongly modified, and the uncus is longer, apically swollen and setose. These Japanese species are similar in facies to the type species, with brown forewings crossed by finely darker but irregular fasciae.

Poole listed six tropical Oriental species in addition to the two Japanese ones. There are also two included from Afghanistan and Pakistan, but, of these, lobbichleri Wiltshire appears unrelated to the Japanese species. The Bornean species below has not been dissected, awaiting a general revision of this generic complex.