10. Falco frontatus, _Gould_ Vol. I. Pl. 10. _Falco lunulatus_, Lath. Ind. Orn. Suppl., p. xiii.? _Sparvius lunulatus_, Vieill. Nouv. Dict. d’Hist. Nat., tom. x. p. 324. _Falco longipennis_, Swains. Anim. in Menag., p. 341.? —— _subbuteo_, Brehm, Isis, 1845, p. 347.? —— (_Hypotriorchis_) _frontatus_, Kaup, Isis, 1847, p. 65. A little Falcon with the habits of the Hobby and Merlin combined; found in all parts of Australia to the southward of the 25th degree of S. lat.; among other birds it preys upon the Quails and the little Partridges belonging to the genus _Synoïcus_. Genus IERACIDEA, _Gould_. Generic characters. _Bill_ and general form of _Falco_, but the _wings_ less powerful, and the third quill-feather the longest; _tarsi_ more elongated, slender, and covered anteriorly with hexagonal scales; _toes_ more feeble, the hind-toe shorter, and the _claws_ less robust. So far as our present knowledge extends, the members of this genus are only three in number, all of which are confined to Australia and New Zealand. 11. Ieracidea Berigora Vol. I. Pl. 11. _Ieracidea Berigora_, Kaup, Class, der Säug. und Vög., p. 112. Professor Kaup considers this species and the succeeding one, _I. occidentalis_, to be identical, but having had numerous opportunities of observing them, I am satisfied that they are distinct; and in confirmation of this opinion I may state that the _I. Berigora_, which is from the eastern coast, is always the largest, has the cere blue-grey, and the plumage of the adult light brown, sparingly blotched with white on the breast; while the _I. occidentalis_, from the western coast, is a more delicately formed bird, has the cere yellow and the breast white, with faint lines of brown down the centre of each feather. 12. Ieracidea occidentalis, _Gould_ Vol. I. Pl. 12. Genus TINNUNCULUS, _Vieill_. 13. Tinnunculus Cenchroïdes Vol. I. Pl. 13. _Cerchneis immaculatus_, Brehm, Isis. A beautiful representative of the Kestrils of Europe and India, where, as well as in Africa and in most parts of America, members of this group are to be found. The range of the _Tinnunculus Cenchroïdes_ extends over the whole of the southern parts of Australia, and that it extends far towards the northern portion of the country is proved by Mr. Gilbert having found it, as well as its nest, during the expedition of Dr. Leichardt from Moreton Bay to Port Essington.