A small (c.1.5-2.5mm) barkfly. A single outdoor record from Scotland.
As with all Lachesilla species the forewing is completely hairless. Unlike L. pedicularia the wings do not have any characteristic features and the abdomen does not have brown stripes (see also L. greeni).
Female
The subgenital plate has two lobes at the apex (cf. L. pedicularia and L. greeni). Compare with similar species
