The White-fronted Falcon is not a migratory species in any of the colonies. I succeeded in finding several of its nests, both in Van Diemen’s Land and on the continent: the situations of all those I observed were near the tops of the most lofty and generally inaccessible trees; they were rather large structures, being fully equal in size to that of a Crow, slightly concave in form, outwardly built of sticks, and lined with the inner bark of trees and other soft materials: the eggs are either two or three in number, of a light buff, blotched and marbled all over with dark buff, one inch and ten lines long by one inch and four lines broad. The stomach is rather muscular and capacious, and its food consists of small birds and insects. Forehead greyish white; crown of the head, cheeks, ear-coverts, and all the upper surface uniform dark bluish grey; internal webs of the primaries, except the tips, numerously barred with oval-shaped markings of buff; two centre tail-feathers grey, transversely barred with obscure markings of black; the remainder of the feathers on each side alternately barred with lines of dark grey and reddish chestnut; throat and chest white, tinged with buff, the feathers of the chest marked down the centre with a stripe of brown; the whole of the under surface and thighs dull reddish orange; irides blackish brown; bill bluish lead-colour, becoming black at the tip; cere, base of the upper mandible, legs and feet yellow; claws black. The sexes exhibit the usual difference in size, the female being much the largest. The plumage of the young differs from that of the adult in being more rusty and the markings less defined, in the feathers of the wings and tail being margined with rufous, and in the whole of the under surface being washed more deeply with rufous than the adult. The Plate represents an adult and young bird of the natural size. [Illustration: IERACIDEA BERIGORA. _J. Gould and H. C. Richter del et lith._ _C. Hullmandel Imp._ ] IERACIDEA BERIGORA. Brown Hawk. _Falco Berigora_, Vig. and Horsf. in Linn. Trans., vol. xv. p. 184. _Ieracidea Berigora_, Gould, Syn. Birds of Australia, Part III. _Berigora_, Aborigines of New South Wales. _Orange-speckled Hawk_ of the Colonists. _Brown Hawk_, Colonists of Van Diemen’s Land.