Microcolona transennata is a moth in the family Elachistidae.

The forewings are dark purple-fuscous, the bases of the scales ochreous-whitish.

There is an ochreous-yellowish elongate spot in the disc at one-fourth, preceded by a blackish tuft.

The plical is placed obliquely before the first discal and is partially edged with ochreous-yellowish.

There is an ochreous-yellow line along the posterior part of the fold and an ochreous-yellow dot towards the apex and two or three variable dots or marks in the apical area.