The genus Tesia of Hodgson was made to embrace several species of birds which are not now considered congeneric; but as Tesia cyaniventris was the first species enumerated by him, it may fairly be considered the type, and as such I adopt it.
In Tesia the bill is rather more than half the Length of the head, broad at the base, flattened, and blunt. The wings are excessively short and rounded, the tail extremely short, and the tarsi very long.
Tesia contains one Indian species, which inhabits the Himalayas and the Eastern hill-ranges. In this genus the sexes are differently coloured, and the young bird does not resemble the female so closely as is usual in the other genera of Crateropodidae. The plumage of the young, however, is perfectly plain and bears no signs of spots, streaks, or bars.