In this sub-family, as in the Anserinæ, the sexes are nearly alike in colour.
The species of this Sub-family are confined to the island of Madagascar.
That sub-family is the Ocnerodrilinae which is American and African in range.
They commence with a section or sub-family of which the type is the Hartebeest.
This sub-family contains a number of genera from Madagascar, viz.