Genus lERACIDEA, Gould. 
CHARACTERES GENERICI. 
Rostrum, ut in genere Falco dicto ; alis attamen miniis rigidis, remige tertio lotigissimo ; (arsis longio- 
ribus, gracilioribus, et antice squamis hexagonalibus tectis ; digitis gracilioi'ihus, digito postico bre- 
viore, unguibus miniis robustis. 
Bill and general form as in Falco, but the wings are less powerful, and the third quill-feather is the 
longest ; the tarsi also are more elongated, slender, and covered anteriorly with hexagonal scales ; toes 
more feeble, the hind toe shorter, and the claws less robust. 
lERACIDEA BERIGORA. 
lerac. vertice ferruginoso-fusco, plumis lined angustd nigra longitudinaliter notatis ; strigd nigra a 
mandibuld inferiore per genas excurrente ; plumis auricularibus fuscis ; abdomine medio, crissogue 
pallide cervinis, siiigidis plumis lined centrali fused anguste notatis ; lateribus ferruginoso-fuscis, 
guttis jlavescenti-albis notatis ; femoribus extiis fuscis, ferrugineo transversim. fasciatis ; dorso 
medio rifescentifasco, scapular ibiis, tectricibusque alarum fuscis, ferrugineo fasciatis ; caudd fusco, 
ferrugineoque fasciatd ; primariis nigrescenti-fuscis, pogoniis internis notis ovalibus cervinis late 
fasciatis ; rostro plumheo ; pedibus obscure plumbeis. 
Long. tot. 18 unc. ; rostri, 11; alee, caudce, 8; tarsi, 3. 
Crown of the head ferruginous brown, with a fine black line down the centre of each feather ; a 
streak of black from the base of the lower mandible down each side of the cheek ; ear-coverts brown ; 
throat, chest, centre of the abdomen, and under tail-coverts pale buff, with a fine line of brown down 
each side of the shaft of every feather ; flanks ferruginous, each feather crossed with spots of butfy 
white ; thighs dark brown, crossed like the flanks but with redder spots ; centre of the back reddisli 
brown ; scapularies and wing-coverts brown, crossed with conspicuous bars and spots of ferruginous ; 
tail brown, crossed with ferruginous bars, and tipped with light brown ; primaries blackish brown, 
margined on their inner webs with large oval-shaped spots of buff"; bill bluish horn colour; feet lead 
colour. 
Syn. Falco Berigora, Vig. and Horsf. in Linn. Trans., vol. xv. p. 184. 
Remark. This bird in its progress from youth to matvirity is subject to very marked changes of 
plumage : the colouring described above appears to be that of an adult ; but I possess other indivi- 
duals apparently mature, in which the whole of the upper and under surface, except the throat, is of 
an almost uniform deep chocolate brown, with only an indication of the ferruginous bars and spots on 
the back, while the wings and tail are the same as in the adult ; the thighs internally however are 
always buff". 
Habitat, Australia generally. 
