Blastobasis tarda is a moth of the family Blastobasidae.

It is found in Australia in Queensland and New South Wales..

It is an introduced species in North America, where it has been found in southern California.

[1][2] There is a species in New Zealand that is very similar in appearance to B. tarda that has yet to be formally described.

This article relating to the genus Blastobasis is a stub.