_Be-wö-wen_, Aborigines of the lowland and mountain districts of Western Australia. _Worle_, Aborigines of King George’s Sound. _Wood Swallow_ of the colonists. This Wood Swallow has been long known to ornithologists, but unfortunately under so many generic and specific appellations, that it may be cited as an instance of the manner in which our science has been burthened with useless names, thereby producing an inextricable confusion, and which in this instance, by a reference to Latham’s accurate description, and the slightest care on the part of other writers, might have been avoided. No other species of the Australian _Artami_ with which I am acquainted possesses so wide a range from east to west as the present; the whole of the southern portion of the continent, as well as the island of Van Diemen’s Land, being alike favoured with its presence. The extent of its range northward has not yet been satisfactorily ascertained, beyond the certainty that it has not hitherto been received in any collection from the north coast. It may be regarded as strictly migratory in Van Diemen’s Land, where it arrives in October, the beginning of the Australian summer, and after rearing at least two broods departs again northwards in November. On the continent a scattered few remain throughout the year in all the localities favourable to its habits, the number being regulated by the supply of insect food necessary for their subsistence. I may here observe, that specimens from Swan River, South Australia and New South Wales present no difference either in size or colouring, while those from Van Diemen’s Land are invariably larger in all their admeasurements, and are also of a deeper colour; I regard them, however, as mere varieties of each other, the greater size of the latter being doubtless caused by the superabundance of food which this more southern and humid climate affords.