The two birds for which the above generic name is proposed, in addition to a peculiar style of coloration, are characterized by the very large operculum over the nostril. The bill is very strong, with the culmen gently curved throughout, and the rictal bristles are weak. The feathers of the forehead are harsh to the touch. The feathers of the crown are somewhat ample, and no doubt in life when erected form a short crest, as represented by Godwin-Austen in his plate of T. oglii.
The type of this genus is T. guttata, which I at one time classed with Stachyrhis, but erroneously as I now see.
Key to the Species.
a. Wings and tail plain………………T. guttata, p. 155.
b. Wings and tail barred with brown………………T. oglii, p. 156.