Osca lata, the coliguacho or black horse fly, is a large horse fly whose range includes southern Chile and southern Argentina.

[4][5][6] The fly has a striking reddish-orange coloration on the side of its thorax and abdomen.

It is generally around 2 cm.

[7] Like most species of horse flies, the females of Scaptia lata need to feed on mammalian blood before they can produce eggs.

This article related to members of the fly superfamily Tabanoidea is a stub.