The present genus is remarkable for its extraordinary resemblance in structure and Coloration to a Drongo or King-Crow (Dicrurus). The plumage is almost entirely black, and the tail forked, owing to the lateral rectrices being turned outwards; the extent to which they diverge is variable, and the median rectrices are straight. All the tail-feathers are nearly equal in length, except the outermost pair, which are much shorter. In other respects there is no important difference from Cacomantis, except that the young only differ from the adults in having a few white spots and less glossy plumage.
The genus ranges throughout the greater part of the Oriental region, a single species occurring in India.