Mothonica cubana is a moth of the family Depressariidae.

The forewings are white sprinkled with brown scales and with an indistinct brown triangular area on the costa at the basal one-third.

There is a larger, more distinct brown triangular area on the costa at one-half and an outwardly curving transverse line from the costal two-thirds to the dorsum before the tornus, composed of a series of fuscous dashes.

The larvae bore the seeds of Copernicia glabrescens.

This article on a moth of the subfamily Stenomatinae is a stub.